java -Xmx8000000000 -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 ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_false-unreach-call1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:40:45,203 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:40:45,205 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:40:45,217 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:40:45,218 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:40:45,219 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:40:45,220 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:40:45,222 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:40:45,224 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:40:45,224 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:40:45,225 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:40:45,226 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:40:45,227 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:40:45,228 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:40:45,229 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:40:45,230 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:40:45,230 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:40:45,232 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:40:45,234 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:40:45,236 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:40:45,237 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:40:45,238 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:40:45,241 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 22:40:45,241 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 22:40:45,241 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 22:40:45,242 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 22:40:45,243 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 22:40:45,244 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 22:40:45,245 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 22:40:45,246 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 22:40:45,246 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 22:40:45,247 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-06 22:40:45,250 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 22:40:45,265 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:40:45,265 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:40:45,266 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:40:45,266 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:40:45,267 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:40:45,267 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:40:45,267 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:40:45,267 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:40:45,268 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:40:45,268 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:40:45,268 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:40:45,268 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:40:45,268 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:40:45,268 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:40:45,269 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:40:45,269 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:40:45,269 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:40:45,269 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:40:45,269 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:40:45,270 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:40:45,270 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:40:45,270 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:40:45,270 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:40:45,270 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:40:45,271 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:40:45,271 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:40:45,271 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:40:45,271 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:40:45,315 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:40:45,332 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:40:45,336 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:40:45,338 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:40:45,338 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:40:45,339 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_false-unreach-call1.i [2018-11-06 22:40:45,405 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce245d34/9ab6afc503ba40b19f2766abd0c86ba8/FLAG16fa9a952 [2018-11-06 22:40:45,890 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:40:45,890 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_false-unreach-call1.i [2018-11-06 22:40:45,896 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce245d34/9ab6afc503ba40b19f2766abd0c86ba8/FLAG16fa9a952 [2018-11-06 22:40:45,910 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce245d34/9ab6afc503ba40b19f2766abd0c86ba8 [2018-11-06 22:40:45,919 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:40:45,921 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:40:45,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:40:45,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:40:45,926 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:40:45,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:40:45" (1/1) ... [2018-11-06 22:40:45,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4688d22a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:45, skipping insertion in model container [2018-11-06 22:40:45,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:40:45" (1/1) ... [2018-11-06 22:40:45,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:40:45,964 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:40:46,207 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:40:46,211 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:40:46,232 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:40:46,255 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:40:46,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:46 WrapperNode [2018-11-06 22:40:46,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:40:46,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:40:46,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:40:46,257 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:40:46,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:46" (1/1) ... [2018-11-06 22:40:46,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:46" (1/1) ... [2018-11-06 22:40:46,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:40:46,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:40:46,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:40:46,302 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:40:46,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:46" (1/1) ... [2018-11-06 22:40:46,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:46" (1/1) ... [2018-11-06 22:40:46,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:46" (1/1) ... [2018-11-06 22:40:46,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:46" (1/1) ... [2018-11-06 22:40:46,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:46" (1/1) ... [2018-11-06 22:40:46,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:46" (1/1) ... [2018-11-06 22:40:46,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:46" (1/1) ... [2018-11-06 22:40:46,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:40:46,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:40:46,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:40:46,336 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:40:46,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:40:46,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:40:46,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:40:46,662 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:40:46,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:40:46 BoogieIcfgContainer [2018-11-06 22:40:46,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:40:46,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:40:46,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:40:46,667 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:40:46,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:40:45" (1/3) ... [2018-11-06 22:40:46,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dca8830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:40:46, skipping insertion in model container [2018-11-06 22:40:46,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:46" (2/3) ... [2018-11-06 22:40:46,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dca8830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:40:46, skipping insertion in model container [2018-11-06 22:40:46,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:40:46" (3/3) ... [2018-11-06 22:40:46,671 INFO L112 eAbstractionObserver]: Analyzing ICFG diamond_false-unreach-call1.i [2018-11-06 22:40:46,681 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:40:46,689 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:40:46,709 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:40:46,742 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:40:46,743 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:40:46,743 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:40:46,744 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:40:46,744 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:40:46,744 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:40:46,744 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:40:46,744 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:40:46,744 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:40:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-11-06 22:40:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-11-06 22:40:46,767 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:46,768 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-11-06 22:40:46,771 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:46,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:46,777 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2018-11-06 22:40:46,781 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:46,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:46,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:46,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:46,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:46,898 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:40:46,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:40:46,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:40:46,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:40:46,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:40:46,920 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-11-06 22:40:46,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:46,936 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-11-06 22:40:46,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:40:46,938 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-11-06 22:40:46,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:46,947 INFO L225 Difference]: With dead ends: 21 [2018-11-06 22:40:46,947 INFO L226 Difference]: Without dead ends: 9 [2018-11-06 22:40:46,951 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:40:46,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-11-06 22:40:46,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-11-06 22:40:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-06 22:40:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-11-06 22:40:46,987 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-11-06 22:40:46,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:46,988 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-11-06 22:40:46,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:40:46,989 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-11-06 22:40:46,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-11-06 22:40:46,989 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:46,989 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:46,990 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:46,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:46,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1805929617, now seen corresponding path program 1 times [2018-11-06 22:40:46,991 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:46,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:46,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:46,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:46,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:47,243 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:40:47,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:40:47,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:40:47,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:40:47,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:40:47,246 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-11-06 22:40:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:47,377 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2018-11-06 22:40:47,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:40:47,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-11-06 22:40:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:47,380 INFO L225 Difference]: With dead ends: 16 [2018-11-06 22:40:47,380 INFO L226 Difference]: Without dead ends: 12 [2018-11-06 22:40:47,381 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:40:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-06 22:40:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-11-06 22:40:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-06 22:40:47,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-11-06 22:40:47,386 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2018-11-06 22:40:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:47,386 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-11-06 22:40:47,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:40:47,387 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-11-06 22:40:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-06 22:40:47,387 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:47,388 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:47,388 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:47,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:47,389 INFO L82 PathProgramCache]: Analyzing trace with hash -992266740, now seen corresponding path program 1 times [2018-11-06 22:40:47,389 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:47,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:47,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:47,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:47,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:47,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:47,516 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:47,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:47,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:47,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:47,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-06 22:40:47,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 22:40:47,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 22:40:47,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:40:47,657 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2018-11-06 22:40:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:47,721 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-11-06 22:40:47,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:40:47,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-11-06 22:40:47,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:47,724 INFO L225 Difference]: With dead ends: 19 [2018-11-06 22:40:47,724 INFO L226 Difference]: Without dead ends: 15 [2018-11-06 22:40:47,725 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:40:47,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-06 22:40:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-11-06 22:40:47,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-06 22:40:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-11-06 22:40:47,730 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-11-06 22:40:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:47,732 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-11-06 22:40:47,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 22:40:47,732 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-11-06 22:40:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-06 22:40:47,733 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:47,733 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:47,733 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:47,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:47,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1049525042, now seen corresponding path program 1 times [2018-11-06 22:40:47,737 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:47,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:47,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:47,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:47,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:47,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:47,885 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:47,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:47,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:47,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:47,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-06 22:40:47,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 22:40:47,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 22:40:47,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:40:47,991 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2018-11-06 22:40:48,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:48,137 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-11-06 22:40:48,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:40:48,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-11-06 22:40:48,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:48,138 INFO L225 Difference]: With dead ends: 21 [2018-11-06 22:40:48,139 INFO L226 Difference]: Without dead ends: 17 [2018-11-06 22:40:48,140 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:40:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-06 22:40:48,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-11-06 22:40:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-06 22:40:48,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-11-06 22:40:48,143 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-11-06 22:40:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:48,144 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-11-06 22:40:48,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 22:40:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-11-06 22:40:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:40:48,145 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:48,145 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:48,145 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:48,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:48,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1039690063, now seen corresponding path program 2 times [2018-11-06 22:40:48,146 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:48,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:48,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:48,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:48,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:48,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:48,408 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:48,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:40:48,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:40:48,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:48,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:48,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:48,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-06 22:40:48,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:40:48,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:40:48,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:40:48,464 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2018-11-06 22:40:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:48,522 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2018-11-06 22:40:48,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:40:48,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-06 22:40:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:48,524 INFO L225 Difference]: With dead ends: 24 [2018-11-06 22:40:48,525 INFO L226 Difference]: Without dead ends: 20 [2018-11-06 22:40:48,525 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:40:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-06 22:40:48,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-11-06 22:40:48,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-06 22:40:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2018-11-06 22:40:48,530 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2018-11-06 22:40:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:48,530 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2018-11-06 22:40:48,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:40:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2018-11-06 22:40:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:40:48,531 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:48,531 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:48,531 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:48,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:48,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1096948365, now seen corresponding path program 1 times [2018-11-06 22:40:48,532 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:48,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:48,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:48,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:48,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:48,671 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:40:48,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:40:48,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:40:48,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:40:48,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:40:48,672 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2018-11-06 22:40:48,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:48,748 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-11-06 22:40:48,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:40:48,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-11-06 22:40:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:48,750 INFO L225 Difference]: With dead ends: 33 [2018-11-06 22:40:48,750 INFO L226 Difference]: Without dead ends: 26 [2018-11-06 22:40:48,752 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:40:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-06 22:40:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-11-06 22:40:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-06 22:40:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-11-06 22:40:48,760 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2018-11-06 22:40:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:48,761 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-11-06 22:40:48,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:40:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-11-06 22:40:48,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:40:48,762 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:48,763 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:48,763 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:48,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1719748433, now seen corresponding path program 2 times [2018-11-06 22:40:48,765 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:48,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:48,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:48,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:48,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:48,867 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:40:48,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:40:48,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:40:48,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:40:48,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:40:48,869 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2018-11-06 22:40:48,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:48,938 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-11-06 22:40:48,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:40:48,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-11-06 22:40:48,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:48,940 INFO L225 Difference]: With dead ends: 33 [2018-11-06 22:40:48,940 INFO L226 Difference]: Without dead ends: 26 [2018-11-06 22:40:48,941 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:40:48,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-06 22:40:48,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-11-06 22:40:48,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-06 22:40:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-11-06 22:40:48,950 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2018-11-06 22:40:48,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:48,950 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-11-06 22:40:48,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:40:48,952 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-11-06 22:40:48,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:40:48,953 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:48,953 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:48,953 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:48,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:48,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1777006735, now seen corresponding path program 2 times [2018-11-06 22:40:48,954 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:48,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:48,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:48,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:48,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:49,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:49,165 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:49,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:40:49,186 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:40:49,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:49,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:49,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:49,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-06 22:40:49,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:40:49,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:40:49,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:40:49,240 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-11-06 22:40:49,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:49,322 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-11-06 22:40:49,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:40:49,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-06 22:40:49,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:49,323 INFO L225 Difference]: With dead ends: 30 [2018-11-06 22:40:49,323 INFO L226 Difference]: Without dead ends: 26 [2018-11-06 22:40:49,324 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:40:49,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-06 22:40:49,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-11-06 22:40:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-06 22:40:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-11-06 22:40:49,329 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2018-11-06 22:40:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:49,330 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-11-06 22:40:49,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:40:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-11-06 22:40:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-06 22:40:49,331 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:49,331 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:49,331 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:49,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:49,332 INFO L82 PathProgramCache]: Analyzing trace with hash -783665172, now seen corresponding path program 3 times [2018-11-06 22:40:49,332 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:49,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:49,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:49,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:49,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:49,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:49,536 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:49,545 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:40:49,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-06 22:40:49,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:49,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:49,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:49,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-06 22:40:49,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 22:40:49,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 22:40:49,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:40:49,605 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2018-11-06 22:40:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:49,992 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-11-06 22:40:49,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:40:49,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-11-06 22:40:49,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:49,995 INFO L225 Difference]: With dead ends: 33 [2018-11-06 22:40:49,995 INFO L226 Difference]: Without dead ends: 29 [2018-11-06 22:40:49,995 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:40:49,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-06 22:40:50,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2018-11-06 22:40:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-06 22:40:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-11-06 22:40:50,009 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2018-11-06 22:40:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:50,010 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-11-06 22:40:50,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 22:40:50,010 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-11-06 22:40:50,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-06 22:40:50,014 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:50,015 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:50,015 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:50,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:50,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1779147282, now seen corresponding path program 3 times [2018-11-06 22:40:50,016 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:50,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:50,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:50,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:50,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:50,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:50,569 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:50,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:40:50,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-06 22:40:50,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:50,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:50,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:50,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-06 22:40:50,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 22:40:50,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 22:40:50,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:40:50,626 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2018-11-06 22:40:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:50,736 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-11-06 22:40:50,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:40:50,736 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-11-06 22:40:50,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:50,737 INFO L225 Difference]: With dead ends: 36 [2018-11-06 22:40:50,737 INFO L226 Difference]: Without dead ends: 32 [2018-11-06 22:40:50,738 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:40:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-06 22:40:50,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-11-06 22:40:50,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-06 22:40:50,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-11-06 22:40:50,744 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 16 [2018-11-06 22:40:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:50,745 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-11-06 22:40:50,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 22:40:50,745 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-11-06 22:40:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-06 22:40:50,746 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:50,746 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:50,746 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:50,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:50,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1408055087, now seen corresponding path program 4 times [2018-11-06 22:40:50,747 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:50,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:50,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:50,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:50,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:51,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:51,093 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:51,104 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:40:51,115 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:40:51,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:51,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:51,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:51,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-06 22:40:51,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:40:51,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:40:51,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:40:51,157 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 7 states. [2018-11-06 22:40:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:51,290 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-11-06 22:40:51,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:40:51,291 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-11-06 22:40:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:51,292 INFO L225 Difference]: With dead ends: 39 [2018-11-06 22:40:51,292 INFO L226 Difference]: Without dead ends: 35 [2018-11-06 22:40:51,293 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:40:51,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-06 22:40:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-11-06 22:40:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-06 22:40:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-11-06 22:40:51,298 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 19 [2018-11-06 22:40:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:51,298 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-11-06 22:40:51,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:40:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-11-06 22:40:51,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-06 22:40:51,300 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:51,300 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:51,300 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:51,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:51,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1123673519, now seen corresponding path program 4 times [2018-11-06 22:40:51,301 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:51,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:51,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:51,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:51,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:51,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:51,492 INFO L225 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 [2018-11-06 22:40:51,501 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:40:51,521 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:40:51,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:51,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:51,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:51,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-06 22:40:51,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:40:51,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:40:51,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:40:51,574 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 7 states. [2018-11-06 22:40:51,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:51,688 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-11-06 22:40:51,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:40:51,689 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-11-06 22:40:51,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:51,690 INFO L225 Difference]: With dead ends: 42 [2018-11-06 22:40:51,691 INFO L226 Difference]: Without dead ends: 38 [2018-11-06 22:40:51,691 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:40:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-06 22:40:51,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-11-06 22:40:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-06 22:40:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-11-06 22:40:51,697 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 19 [2018-11-06 22:40:51,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:51,697 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-11-06 22:40:51,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:40:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-11-06 22:40:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-06 22:40:51,698 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:51,698 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:51,699 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:51,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:51,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1104653876, now seen corresponding path program 5 times [2018-11-06 22:40:51,699 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:51,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:51,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:51,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:51,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:51,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:51,856 INFO L225 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 [2018-11-06 22:40:51,865 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:40:51,889 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-06 22:40:51,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:51,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:51,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:51,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-06 22:40:51,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:40:51,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:40:51,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:40:51,931 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 8 states. [2018-11-06 22:40:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:52,122 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-11-06 22:40:52,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:40:52,124 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-11-06 22:40:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:52,125 INFO L225 Difference]: With dead ends: 45 [2018-11-06 22:40:52,125 INFO L226 Difference]: Without dead ends: 41 [2018-11-06 22:40:52,126 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:40:52,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-06 22:40:52,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-11-06 22:40:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-06 22:40:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-11-06 22:40:52,131 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 22 [2018-11-06 22:40:52,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:52,132 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-11-06 22:40:52,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:40:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-11-06 22:40:52,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-06 22:40:52,133 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:52,133 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:52,133 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:52,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:52,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1173872398, now seen corresponding path program 5 times [2018-11-06 22:40:52,134 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:52,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:52,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:52,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:52,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:52,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:52,309 INFO L225 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 [2018-11-06 22:40:52,319 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:40:52,358 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-06 22:40:52,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:52,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:52,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:52,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-06 22:40:52,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:40:52,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:40:52,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:40:52,392 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 8 states. [2018-11-06 22:40:52,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:52,590 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-11-06 22:40:52,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:40:52,591 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-11-06 22:40:52,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:52,592 INFO L225 Difference]: With dead ends: 48 [2018-11-06 22:40:52,592 INFO L226 Difference]: Without dead ends: 44 [2018-11-06 22:40:52,593 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:40:52,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-06 22:40:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2018-11-06 22:40:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-06 22:40:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-11-06 22:40:52,603 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 22 [2018-11-06 22:40:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:52,603 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-11-06 22:40:52,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:40:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-11-06 22:40:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-06 22:40:52,608 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:52,608 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:52,608 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:52,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:52,609 INFO L82 PathProgramCache]: Analyzing trace with hash 909632241, now seen corresponding path program 6 times [2018-11-06 22:40:52,609 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:52,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:52,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:52,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:52,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:52,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:52,782 INFO L225 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 [2018-11-06 22:40:52,800 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:40:52,862 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-06 22:40:52,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:52,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:52,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:52,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-06 22:40:52,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:40:52,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:40:52,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:40:52,907 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 9 states. [2018-11-06 22:40:53,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:53,025 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-11-06 22:40:53,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 22:40:53,025 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-11-06 22:40:53,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:53,026 INFO L225 Difference]: With dead ends: 51 [2018-11-06 22:40:53,026 INFO L226 Difference]: Without dead ends: 47 [2018-11-06 22:40:53,027 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:40:53,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-06 22:40:53,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2018-11-06 22:40:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-06 22:40:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-11-06 22:40:53,034 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 25 [2018-11-06 22:40:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:53,034 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-11-06 22:40:53,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:40:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-11-06 22:40:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-06 22:40:53,035 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:53,035 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:53,036 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:53,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:53,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1529510607, now seen corresponding path program 6 times [2018-11-06 22:40:53,036 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:53,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:53,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:53,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:53,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:53,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:53,268 INFO L225 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 [2018-11-06 22:40:53,277 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:40:53,396 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-06 22:40:53,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:53,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:53,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:53,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-06 22:40:53,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:40:53,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:40:53,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:40:53,445 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 9 states. [2018-11-06 22:40:53,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:53,622 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-11-06 22:40:53,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 22:40:53,623 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-11-06 22:40:53,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:53,624 INFO L225 Difference]: With dead ends: 54 [2018-11-06 22:40:53,624 INFO L226 Difference]: Without dead ends: 50 [2018-11-06 22:40:53,625 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:40:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-06 22:40:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-11-06 22:40:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-06 22:40:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-11-06 22:40:53,631 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 25 [2018-11-06 22:40:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:53,631 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-11-06 22:40:53,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:40:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-11-06 22:40:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-06 22:40:53,632 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:53,633 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:53,633 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:53,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:53,633 INFO L82 PathProgramCache]: Analyzing trace with hash -775715924, now seen corresponding path program 7 times [2018-11-06 22:40:53,633 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:53,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:53,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:53,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:53,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:53,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:53,989 INFO L225 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 [2018-11-06 22:40:54,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:54,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:54,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:54,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-06 22:40:54,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:40:54,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:40:54,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:40:54,076 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 10 states. [2018-11-06 22:40:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:54,836 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-11-06 22:40:54,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:40:54,836 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-11-06 22:40:54,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:54,837 INFO L225 Difference]: With dead ends: 57 [2018-11-06 22:40:54,838 INFO L226 Difference]: Without dead ends: 53 [2018-11-06 22:40:54,839 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:40:54,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-11-06 22:40:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2018-11-06 22:40:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-06 22:40:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-11-06 22:40:54,846 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 28 [2018-11-06 22:40:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:54,846 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-11-06 22:40:54,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:40:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-11-06 22:40:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-06 22:40:54,847 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:54,847 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:54,848 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:54,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:54,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1214122030, now seen corresponding path program 7 times [2018-11-06 22:40:54,848 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:54,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:54,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:54,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:54,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:55,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:55,017 INFO L225 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 [2018-11-06 22:40:55,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:55,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:55,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:55,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-06 22:40:55,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:40:55,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:40:55,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:40:55,078 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 10 states. [2018-11-06 22:40:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:55,258 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-11-06 22:40:55,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:40:55,259 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-11-06 22:40:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:55,259 INFO L225 Difference]: With dead ends: 60 [2018-11-06 22:40:55,259 INFO L226 Difference]: Without dead ends: 56 [2018-11-06 22:40:55,260 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:40:55,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-11-06 22:40:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2018-11-06 22:40:55,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-06 22:40:55,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-11-06 22:40:55,267 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 28 [2018-11-06 22:40:55,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:55,268 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-11-06 22:40:55,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:40:55,268 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-11-06 22:40:55,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-06 22:40:55,269 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:55,269 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:55,269 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:55,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash -815209199, now seen corresponding path program 8 times [2018-11-06 22:40:55,270 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:55,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:55,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:55,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:55,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:55,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:55,454 INFO L225 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 [2018-11-06 22:40:55,463 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:40:55,473 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:40:55,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:55,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:55,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:55,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-06 22:40:55,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:40:55,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:40:55,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:40:55,516 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 11 states. [2018-11-06 22:40:55,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:55,704 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-11-06 22:40:55,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:40:55,704 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-11-06 22:40:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:55,706 INFO L225 Difference]: With dead ends: 63 [2018-11-06 22:40:55,706 INFO L226 Difference]: Without dead ends: 59 [2018-11-06 22:40:55,707 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:40:55,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-06 22:40:55,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2018-11-06 22:40:55,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-06 22:40:55,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-11-06 22:40:55,712 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2018-11-06 22:40:55,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:55,713 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-11-06 22:40:55,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:40:55,713 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-11-06 22:40:55,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-06 22:40:55,714 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:55,714 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:55,714 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:55,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:55,715 INFO L82 PathProgramCache]: Analyzing trace with hash -748599279, now seen corresponding path program 8 times [2018-11-06 22:40:55,715 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:55,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:55,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:55,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:55,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:55,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:55,963 INFO L225 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 [2018-11-06 22:40:55,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:40:55,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:40:55,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:55,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:56,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:56,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-06 22:40:56,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:40:56,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:40:56,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:40:56,042 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 11 states. [2018-11-06 22:40:56,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:56,259 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-11-06 22:40:56,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:40:56,259 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-11-06 22:40:56,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:56,260 INFO L225 Difference]: With dead ends: 66 [2018-11-06 22:40:56,261 INFO L226 Difference]: Without dead ends: 62 [2018-11-06 22:40:56,261 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:40:56,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-06 22:40:56,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2018-11-06 22:40:56,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-06 22:40:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-11-06 22:40:56,268 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 31 [2018-11-06 22:40:56,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:56,268 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-11-06 22:40:56,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:40:56,269 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-11-06 22:40:56,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-06 22:40:56,269 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:56,270 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:56,270 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:56,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:56,270 INFO L82 PathProgramCache]: Analyzing trace with hash -538325620, now seen corresponding path program 9 times [2018-11-06 22:40:56,270 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:56,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:56,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:56,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:56,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:56,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:56,546 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:56,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:40:56,641 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-06 22:40:56,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:56,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:56,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:56,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-06 22:40:56,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:40:56,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:40:56,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:40:56,682 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 12 states. [2018-11-06 22:40:57,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:57,104 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-11-06 22:40:57,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:40:57,105 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-11-06 22:40:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:57,106 INFO L225 Difference]: With dead ends: 69 [2018-11-06 22:40:57,106 INFO L226 Difference]: Without dead ends: 65 [2018-11-06 22:40:57,107 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:40:57,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-11-06 22:40:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2018-11-06 22:40:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-06 22:40:57,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-11-06 22:40:57,112 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 34 [2018-11-06 22:40:57,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:57,113 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-11-06 22:40:57,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:40:57,113 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-11-06 22:40:57,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-06 22:40:57,113 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:57,114 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:57,114 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:57,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:57,114 INFO L82 PathProgramCache]: Analyzing trace with hash -494347954, now seen corresponding path program 9 times [2018-11-06 22:40:57,114 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:57,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:57,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:57,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:57,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:57,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:57,975 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:57,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:40:58,177 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-06 22:40:58,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:58,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:58,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:58,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-06 22:40:58,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:40:58,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:40:58,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:40:58,234 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 12 states. [2018-11-06 22:40:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:58,656 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-11-06 22:40:58,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:40:58,658 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-11-06 22:40:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:58,658 INFO L225 Difference]: With dead ends: 72 [2018-11-06 22:40:58,659 INFO L226 Difference]: Without dead ends: 68 [2018-11-06 22:40:58,659 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:40:58,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-06 22:40:58,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2018-11-06 22:40:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-06 22:40:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-11-06 22:40:58,672 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 34 [2018-11-06 22:40:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:58,672 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-11-06 22:40:58,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:40:58,672 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-11-06 22:40:58,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-06 22:40:58,673 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:58,673 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:58,673 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:58,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:58,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1763168049, now seen corresponding path program 10 times [2018-11-06 22:40:58,674 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:58,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:58,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:58,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:58,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:59,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:59,163 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:59,183 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:40:59,218 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:40:59,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:59,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:59,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:59,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-06 22:40:59,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:40:59,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:40:59,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:40:59,299 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 13 states. [2018-11-06 22:40:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:59,654 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-11-06 22:40:59,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:40:59,654 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-11-06 22:40:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:59,655 INFO L225 Difference]: With dead ends: 75 [2018-11-06 22:40:59,655 INFO L226 Difference]: Without dead ends: 71 [2018-11-06 22:40:59,657 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:40:59,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-06 22:40:59,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2018-11-06 22:40:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-11-06 22:40:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-11-06 22:40:59,662 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 37 [2018-11-06 22:40:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:59,663 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-11-06 22:40:59,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:40:59,663 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-11-06 22:40:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-06 22:40:59,663 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:59,664 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:59,664 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:59,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:59,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1879532273, now seen corresponding path program 10 times [2018-11-06 22:40:59,664 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:59,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:59,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:59,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:59,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:59,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:59,965 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:40:59,975 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:40:59,991 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:40:59,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:59,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:00,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:00,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-06 22:41:00,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:41:00,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:41:00,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:41:00,042 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 13 states. [2018-11-06 22:41:00,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:00,281 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-11-06 22:41:00,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:41:00,282 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-11-06 22:41:00,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:00,283 INFO L225 Difference]: With dead ends: 78 [2018-11-06 22:41:00,283 INFO L226 Difference]: Without dead ends: 74 [2018-11-06 22:41:00,283 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:41:00,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-11-06 22:41:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-11-06 22:41:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-06 22:41:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-11-06 22:41:00,287 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 37 [2018-11-06 22:41:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:00,287 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-11-06 22:41:00,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:41:00,287 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-11-06 22:41:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-06 22:41:00,288 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:00,288 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:00,288 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:00,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:00,289 INFO L82 PathProgramCache]: Analyzing trace with hash 703147884, now seen corresponding path program 11 times [2018-11-06 22:41:00,289 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:00,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:00,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:00,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:00,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:01,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:01,014 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:01,023 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:41:01,453 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-06 22:41:01,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:01,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:01,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:01,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-06 22:41:01,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-06 22:41:01,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-06 22:41:01,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:41:01,500 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 14 states. [2018-11-06 22:41:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:02,434 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-11-06 22:41:02,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:41:02,435 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2018-11-06 22:41:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:02,435 INFO L225 Difference]: With dead ends: 81 [2018-11-06 22:41:02,436 INFO L226 Difference]: Without dead ends: 77 [2018-11-06 22:41:02,436 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:41:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-11-06 22:41:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2018-11-06 22:41:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-11-06 22:41:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-11-06 22:41:02,440 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 40 [2018-11-06 22:41:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:02,441 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-11-06 22:41:02,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-06 22:41:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-11-06 22:41:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-06 22:41:02,441 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:02,441 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:02,442 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:02,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:02,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1213878894, now seen corresponding path program 11 times [2018-11-06 22:41:02,442 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:02,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:02,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:02,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:02,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:02,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:02,760 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:02,772 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:41:06,101 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-06 22:41:06,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:06,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:06,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:06,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-06 22:41:06,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-06 22:41:06,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-06 22:41:06,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:41:06,187 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 14 states. [2018-11-06 22:41:06,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:06,562 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-11-06 22:41:06,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:41:06,562 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2018-11-06 22:41:06,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:06,563 INFO L225 Difference]: With dead ends: 84 [2018-11-06 22:41:06,563 INFO L226 Difference]: Without dead ends: 80 [2018-11-06 22:41:06,564 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:41:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-11-06 22:41:06,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2018-11-06 22:41:06,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-06 22:41:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-11-06 22:41:06,568 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 40 [2018-11-06 22:41:06,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:06,568 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-11-06 22:41:06,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-06 22:41:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-11-06 22:41:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-06 22:41:06,569 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:06,569 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:06,569 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:06,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:06,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1758027439, now seen corresponding path program 12 times [2018-11-06 22:41:06,570 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:06,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:06,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:06,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:06,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:06,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:06,873 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:06,881 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:41:11,183 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-06 22:41:11,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:11,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:11,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:11,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-06 22:41:11,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:41:11,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:41:11,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:41:11,237 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 15 states. [2018-11-06 22:41:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:11,504 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-11-06 22:41:11,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:41:11,505 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-11-06 22:41:11,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:11,506 INFO L225 Difference]: With dead ends: 87 [2018-11-06 22:41:11,506 INFO L226 Difference]: Without dead ends: 83 [2018-11-06 22:41:11,506 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:41:11,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-11-06 22:41:11,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2018-11-06 22:41:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-06 22:41:11,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-11-06 22:41:11,512 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 43 [2018-11-06 22:41:11,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:11,512 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-11-06 22:41:11,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:41:11,512 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-11-06 22:41:11,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-06 22:41:11,513 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:11,513 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:11,513 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:11,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:11,514 INFO L82 PathProgramCache]: Analyzing trace with hash 598070737, now seen corresponding path program 12 times [2018-11-06 22:41:11,514 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:11,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:11,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:11,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:11,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:12,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:12,537 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:12,547 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:41:12,602 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-06 22:41:12,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:12,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:12,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:12,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-06 22:41:12,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:41:12,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:41:12,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:41:12,638 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 15 states. [2018-11-06 22:41:12,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:12,994 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-11-06 22:41:12,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:41:12,995 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-11-06 22:41:12,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:12,996 INFO L225 Difference]: With dead ends: 90 [2018-11-06 22:41:12,996 INFO L226 Difference]: Without dead ends: 86 [2018-11-06 22:41:12,997 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:41:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-11-06 22:41:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2018-11-06 22:41:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-06 22:41:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-11-06 22:41:13,002 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 43 [2018-11-06 22:41:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:13,002 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-11-06 22:41:13,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:41:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-11-06 22:41:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-06 22:41:13,003 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:13,003 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:13,003 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:13,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:13,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1049602380, now seen corresponding path program 13 times [2018-11-06 22:41:13,004 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:13,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:13,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:13,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:13,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:14,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:14,216 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:14,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:41:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:14,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:14,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:14,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-06 22:41:14,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:41:14,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:41:14,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:41:14,278 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 16 states. [2018-11-06 22:41:14,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:14,773 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-11-06 22:41:14,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:41:14,774 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-11-06 22:41:14,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:14,775 INFO L225 Difference]: With dead ends: 93 [2018-11-06 22:41:14,776 INFO L226 Difference]: Without dead ends: 89 [2018-11-06 22:41:14,776 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:41:14,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-06 22:41:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2018-11-06 22:41:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-06 22:41:14,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-11-06 22:41:14,782 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 46 [2018-11-06 22:41:14,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:14,783 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-11-06 22:41:14,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:41:14,783 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-11-06 22:41:14,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-06 22:41:14,784 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:14,784 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:14,784 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:14,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:14,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1137413234, now seen corresponding path program 13 times [2018-11-06 22:41:14,785 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:14,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:14,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:14,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:41:14,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:16,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:16,214 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:16,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:41:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:16,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:16,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:16,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-06 22:41:16,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:41:16,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:41:16,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:41:16,287 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 16 states. [2018-11-06 22:41:16,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:16,845 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-11-06 22:41:16,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:41:16,846 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-11-06 22:41:16,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:16,847 INFO L225 Difference]: With dead ends: 96 [2018-11-06 22:41:16,847 INFO L226 Difference]: Without dead ends: 92 [2018-11-06 22:41:16,848 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:41:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-11-06 22:41:16,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2018-11-06 22:41:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-11-06 22:41:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-11-06 22:41:16,854 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 46 [2018-11-06 22:41:16,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:16,854 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-11-06 22:41:16,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:41:16,855 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-11-06 22:41:16,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-06 22:41:16,855 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:16,855 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:16,856 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:16,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:16,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1338549391, now seen corresponding path program 14 times [2018-11-06 22:41:16,856 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:16,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:16,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:16,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:41:16,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:17,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:17,134 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:17,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:41:17,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:41:17,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:17,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:17,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:17,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-06 22:41:17,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:41:17,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:41:17,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:41:17,193 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 17 states. [2018-11-06 22:41:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:17,605 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-11-06 22:41:17,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:41:17,605 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-11-06 22:41:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:17,606 INFO L225 Difference]: With dead ends: 99 [2018-11-06 22:41:17,606 INFO L226 Difference]: Without dead ends: 95 [2018-11-06 22:41:17,607 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:41:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-06 22:41:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2018-11-06 22:41:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-06 22:41:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-11-06 22:41:17,610 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 49 [2018-11-06 22:41:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:17,611 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-11-06 22:41:17,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:41:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-11-06 22:41:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-06 22:41:17,611 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:17,611 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:17,612 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:17,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:17,612 INFO L82 PathProgramCache]: Analyzing trace with hash -124084047, now seen corresponding path program 14 times [2018-11-06 22:41:17,612 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:17,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:17,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:17,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:17,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:18,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:18,157 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:18,164 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:41:18,182 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:41:18,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:18,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:18,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:18,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-06 22:41:18,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:41:18,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:41:18,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:41:18,248 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 17 states. [2018-11-06 22:41:18,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:18,873 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-11-06 22:41:18,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:41:18,873 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-11-06 22:41:18,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:18,874 INFO L225 Difference]: With dead ends: 102 [2018-11-06 22:41:18,874 INFO L226 Difference]: Without dead ends: 98 [2018-11-06 22:41:18,875 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:41:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-11-06 22:41:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-11-06 22:41:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-06 22:41:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-11-06 22:41:18,880 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 49 [2018-11-06 22:41:18,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:18,880 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-11-06 22:41:18,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:41:18,881 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-11-06 22:41:18,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-06 22:41:18,881 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:18,881 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:18,881 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:18,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:18,882 INFO L82 PathProgramCache]: Analyzing trace with hash -634701012, now seen corresponding path program 15 times [2018-11-06 22:41:18,882 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:18,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:18,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:18,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:18,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:19,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:19,165 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:19,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:41:22,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-06 22:41:22,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:22,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:22,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:22,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-06 22:41:22,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:41:22,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:41:22,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:41:22,208 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 18 states. [2018-11-06 22:41:22,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:22,661 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-11-06 22:41:22,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 22:41:22,662 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-11-06 22:41:22,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:22,662 INFO L225 Difference]: With dead ends: 105 [2018-11-06 22:41:22,662 INFO L226 Difference]: Without dead ends: 101 [2018-11-06 22:41:22,663 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:41:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-11-06 22:41:22,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2018-11-06 22:41:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-11-06 22:41:22,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-11-06 22:41:22,668 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 52 [2018-11-06 22:41:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:22,668 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-11-06 22:41:22,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:41:22,669 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-11-06 22:41:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-06 22:41:22,669 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:22,669 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:22,670 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:22,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:22,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1359397714, now seen corresponding path program 15 times [2018-11-06 22:41:22,670 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:22,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:22,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:22,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:22,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:23,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:23,669 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:23,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:41:24,222 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-06 22:41:24,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:24,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:24,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:24,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-06 22:41:24,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:41:24,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:41:24,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:41:24,270 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 18 states. [2018-11-06 22:41:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:24,715 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-11-06 22:41:24,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 22:41:24,715 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-11-06 22:41:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:24,717 INFO L225 Difference]: With dead ends: 108 [2018-11-06 22:41:24,717 INFO L226 Difference]: Without dead ends: 104 [2018-11-06 22:41:24,718 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:41:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-11-06 22:41:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2018-11-06 22:41:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-11-06 22:41:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-11-06 22:41:24,723 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 52 [2018-11-06 22:41:24,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:24,723 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-11-06 22:41:24,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:41:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-11-06 22:41:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-06 22:41:24,724 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:24,724 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:24,725 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:24,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:24,725 INFO L82 PathProgramCache]: Analyzing trace with hash -317981295, now seen corresponding path program 16 times [2018-11-06 22:41:24,725 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:24,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:24,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:24,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:24,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:25,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:25,530 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:25,539 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:41:25,554 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:41:25,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:25,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:25,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:25,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-06 22:41:25,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:41:25,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:41:25,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:41:25,587 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 19 states. [2018-11-06 22:41:25,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:26,000 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-11-06 22:41:26,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 22:41:26,000 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-11-06 22:41:26,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:26,002 INFO L225 Difference]: With dead ends: 111 [2018-11-06 22:41:26,002 INFO L226 Difference]: Without dead ends: 107 [2018-11-06 22:41:26,002 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:41:26,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-11-06 22:41:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2018-11-06 22:41:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-11-06 22:41:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-11-06 22:41:26,007 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 55 [2018-11-06 22:41:26,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:26,007 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-11-06 22:41:26,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:41:26,007 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-11-06 22:41:26,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-06 22:41:26,008 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:26,008 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:26,008 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:26,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:26,009 INFO L82 PathProgramCache]: Analyzing trace with hash 985908113, now seen corresponding path program 16 times [2018-11-06 22:41:26,009 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:26,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:26,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:26,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:26,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:26,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:26,301 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:26,311 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:41:26,328 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:41:26,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:26,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:26,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:26,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-06 22:41:26,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:41:26,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:41:26,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:41:26,373 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 19 states. [2018-11-06 22:41:26,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:26,889 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-11-06 22:41:26,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 22:41:26,890 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-11-06 22:41:26,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:26,891 INFO L225 Difference]: With dead ends: 114 [2018-11-06 22:41:26,892 INFO L226 Difference]: Without dead ends: 110 [2018-11-06 22:41:26,892 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:41:26,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-11-06 22:41:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2018-11-06 22:41:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-06 22:41:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-11-06 22:41:26,899 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 55 [2018-11-06 22:41:26,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:26,899 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-11-06 22:41:26,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:41:26,899 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-11-06 22:41:26,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-06 22:41:26,900 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:26,900 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:26,900 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:26,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:26,901 INFO L82 PathProgramCache]: Analyzing trace with hash -964041460, now seen corresponding path program 17 times [2018-11-06 22:41:26,901 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:26,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:26,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:26,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:26,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:27,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:27,560 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:27,571 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:41:56,279 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-06 22:41:56,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:56,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:56,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:56,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-06 22:41:56,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 22:41:56,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 22:41:56,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:41:56,326 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 20 states. [2018-11-06 22:41:56,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:56,867 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-11-06 22:41:56,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:41:56,868 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-11-06 22:41:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:56,869 INFO L225 Difference]: With dead ends: 117 [2018-11-06 22:41:56,869 INFO L226 Difference]: Without dead ends: 113 [2018-11-06 22:41:56,870 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:41:56,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-11-06 22:41:56,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2018-11-06 22:41:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-11-06 22:41:56,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-11-06 22:41:56,875 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 58 [2018-11-06 22:41:56,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:56,876 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-11-06 22:41:56,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 22:41:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-11-06 22:41:56,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-06 22:41:56,876 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:56,876 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:56,877 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:56,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:56,877 INFO L82 PathProgramCache]: Analyzing trace with hash -536171058, now seen corresponding path program 17 times [2018-11-06 22:41:56,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:56,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:56,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:56,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:56,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:57,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:57,431 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:41:57,440 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:42:21,249 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-06 22:42:21,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:42:21,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:42:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:42:21,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:42:21,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-06 22:42:21,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 22:42:21,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 22:42:21,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:42:21,337 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 20 states. [2018-11-06 22:42:21,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:42:21,893 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-11-06 22:42:21,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:42:21,893 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-11-06 22:42:21,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:42:21,894 INFO L225 Difference]: With dead ends: 120 [2018-11-06 22:42:21,894 INFO L226 Difference]: Without dead ends: 116 [2018-11-06 22:42:21,895 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:42:21,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-11-06 22:42:21,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2018-11-06 22:42:21,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-11-06 22:42:21,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-11-06 22:42:21,900 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 58 [2018-11-06 22:42:21,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:42:21,900 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-11-06 22:42:21,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 22:42:21,900 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-11-06 22:42:21,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-06 22:42:21,901 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:42:21,901 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-11-06 22:42:21,901 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:42:21,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:42:21,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1993963599, now seen corresponding path program 18 times [2018-11-06 22:42:21,901 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:42:21,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:42:21,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:21,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:42:21,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:42:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:42:22,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:42:22,317 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:42:22,324 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:42:55,109 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-06 22:42:55,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:42:55,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:42:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:42:55,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:42:55,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-06 22:42:55,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-06 22:42:55,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-06 22:42:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:42:55,290 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 21 states. [2018-11-06 22:42:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:42:55,869 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-11-06 22:42:55,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-06 22:42:55,870 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-11-06 22:42:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:42:55,871 INFO L225 Difference]: With dead ends: 123 [2018-11-06 22:42:55,871 INFO L226 Difference]: Without dead ends: 119 [2018-11-06 22:42:55,872 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:42:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-06 22:42:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2018-11-06 22:42:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-11-06 22:42:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2018-11-06 22:42:55,877 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 61 [2018-11-06 22:42:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:42:55,877 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2018-11-06 22:42:55,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-06 22:42:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2018-11-06 22:42:55,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-06 22:42:55,878 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:42:55,878 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-11-06 22:42:55,878 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:42:55,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:42:55,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1467956849, now seen corresponding path program 18 times [2018-11-06 22:42:55,878 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:42:55,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:42:55,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:55,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:42:55,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:42:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:42:56,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:42:56,443 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:42:56,451 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:42:57,329 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-06 22:42:57,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:42:57,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:42:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:42:57,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:42:57,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-06 22:42:57,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-06 22:42:57,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-06 22:42:57,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:42:57,368 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 21 states. [2018-11-06 22:42:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:42:58,013 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-11-06 22:42:58,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-06 22:42:58,013 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-11-06 22:42:58,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:42:58,014 INFO L225 Difference]: With dead ends: 126 [2018-11-06 22:42:58,015 INFO L226 Difference]: Without dead ends: 122 [2018-11-06 22:42:58,015 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:42:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-11-06 22:42:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-11-06 22:42:58,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-11-06 22:42:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-11-06 22:42:58,021 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 61 [2018-11-06 22:42:58,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:42:58,021 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-11-06 22:42:58,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-06 22:42:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-11-06 22:42:58,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-06 22:42:58,022 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:42:58,022 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-11-06 22:42:58,022 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:42:58,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:42:58,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1158043924, now seen corresponding path program 19 times [2018-11-06 22:42:58,023 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:42:58,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:42:58,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:58,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:42:58,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:42:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:42:59,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:42:59,247 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:42:59,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:42:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:42:59,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:42:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:42:59,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:42:59,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-06 22:42:59,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:42:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:42:59,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:42:59,339 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 22 states. [2018-11-06 22:42:59,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:42:59,986 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-11-06 22:42:59,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:42:59,986 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-11-06 22:42:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:42:59,987 INFO L225 Difference]: With dead ends: 129 [2018-11-06 22:42:59,987 INFO L226 Difference]: Without dead ends: 125 [2018-11-06 22:42:59,988 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:42:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-11-06 22:42:59,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2018-11-06 22:42:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-11-06 22:42:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2018-11-06 22:42:59,994 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 64 [2018-11-06 22:42:59,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:42:59,994 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2018-11-06 22:42:59,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:42:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2018-11-06 22:42:59,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-06 22:42:59,995 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:42:59,995 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-11-06 22:42:59,995 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:42:59,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:42:59,995 INFO L82 PathProgramCache]: Analyzing trace with hash 2102052590, now seen corresponding path program 19 times [2018-11-06 22:42:59,996 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:42:59,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:42:59,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:59,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:42:59,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:00,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:00,456 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:00,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:00,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:00,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:00,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-06 22:43:00,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:43:00,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:43:00,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:43:00,556 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 22 states. [2018-11-06 22:43:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:01,336 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-11-06 22:43:01,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:43:01,336 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-11-06 22:43:01,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:01,338 INFO L225 Difference]: With dead ends: 132 [2018-11-06 22:43:01,338 INFO L226 Difference]: Without dead ends: 128 [2018-11-06 22:43:01,348 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:43:01,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-11-06 22:43:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2018-11-06 22:43:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-11-06 22:43:01,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-11-06 22:43:01,354 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 64 [2018-11-06 22:43:01,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:01,354 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-11-06 22:43:01,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:43:01,354 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-11-06 22:43:01,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-06 22:43:01,355 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:01,355 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:01,355 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:01,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:01,356 INFO L82 PathProgramCache]: Analyzing trace with hash -495388207, now seen corresponding path program 20 times [2018-11-06 22:43:01,356 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:01,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:01,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:01,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:01,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:01,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:01,987 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:01,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:43:02,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:43:02,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:02,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:02,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:02,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-06 22:43:02,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-06 22:43:02,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-06 22:43:02,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:43:02,051 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 23 states. [2018-11-06 22:43:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:02,677 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-11-06 22:43:02,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-06 22:43:02,677 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-11-06 22:43:02,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:02,678 INFO L225 Difference]: With dead ends: 135 [2018-11-06 22:43:02,679 INFO L226 Difference]: Without dead ends: 131 [2018-11-06 22:43:02,679 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:43:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-11-06 22:43:02,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2018-11-06 22:43:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-11-06 22:43:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-11-06 22:43:02,686 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 67 [2018-11-06 22:43:02,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:02,687 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-11-06 22:43:02,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-06 22:43:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-11-06 22:43:02,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-11-06 22:43:02,688 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:02,688 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:02,688 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:02,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:02,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1112862383, now seen corresponding path program 20 times [2018-11-06 22:43:02,689 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:02,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:02,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:02,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:02,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:03,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:03,851 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:03,859 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:43:03,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:43:03,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:03,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:03,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:03,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-06 22:43:03,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-06 22:43:03,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-06 22:43:03,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:43:03,916 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 23 states. [2018-11-06 22:43:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:04,667 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-11-06 22:43:04,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-06 22:43:04,668 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-11-06 22:43:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:04,669 INFO L225 Difference]: With dead ends: 138 [2018-11-06 22:43:04,669 INFO L226 Difference]: Without dead ends: 134 [2018-11-06 22:43:04,670 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:43:04,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-06 22:43:04,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2018-11-06 22:43:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-11-06 22:43:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-11-06 22:43:04,676 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 67 [2018-11-06 22:43:04,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:04,676 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-11-06 22:43:04,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-06 22:43:04,676 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-11-06 22:43:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-06 22:43:04,677 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:04,677 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:04,677 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:04,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:04,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1011384524, now seen corresponding path program 21 times [2018-11-06 22:43:04,678 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:04,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:04,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:04,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:04,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:05,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:05,503 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:43:05,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:44:08,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-06 22:44:08,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:09,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:09,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:09,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-06 22:44:09,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-06 22:44:09,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-06 22:44:09,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:44:09,248 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 24 states. [2018-11-06 22:44:11,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:11,777 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-11-06 22:44:11,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:44:11,777 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2018-11-06 22:44:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:11,779 INFO L225 Difference]: With dead ends: 141 [2018-11-06 22:44:11,779 INFO L226 Difference]: Without dead ends: 137 [2018-11-06 22:44:11,779 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:44:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-11-06 22:44:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2018-11-06 22:44:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-11-06 22:44:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-11-06 22:44:11,785 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 70 [2018-11-06 22:44:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:11,786 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-11-06 22:44:11,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-06 22:44:11,786 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-11-06 22:44:11,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-06 22:44:11,786 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:11,787 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:11,787 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:11,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:11,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1125877774, now seen corresponding path program 21 times [2018-11-06 22:44:11,787 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:11,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:11,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:11,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:11,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:12,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:12,541 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:12,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:44:17,895 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-06 22:44:17,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:17,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:18,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:18,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-06 22:44:18,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-06 22:44:18,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-06 22:44:18,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:44:18,036 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 24 states. [2018-11-06 22:44:18,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:18,873 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-11-06 22:44:18,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:44:18,873 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2018-11-06 22:44:18,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:18,874 INFO L225 Difference]: With dead ends: 144 [2018-11-06 22:44:18,874 INFO L226 Difference]: Without dead ends: 140 [2018-11-06 22:44:18,875 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:44:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-11-06 22:44:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2018-11-06 22:44:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-11-06 22:44:18,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-11-06 22:44:18,881 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 70 [2018-11-06 22:44:18,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:18,881 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-11-06 22:44:18,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-06 22:44:18,881 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-11-06 22:44:18,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-06 22:44:18,881 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:18,882 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:18,882 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:18,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:18,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1720364047, now seen corresponding path program 22 times [2018-11-06 22:44:18,882 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:18,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:18,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:18,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:18,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:19,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:19,363 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:19,374 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:44:19,403 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:44:19,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:19,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:19,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:19,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-06 22:44:19,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:44:19,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:44:19,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:44:19,439 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 25 states. [2018-11-06 22:44:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:20,183 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-11-06 22:44:20,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-06 22:44:20,183 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-11-06 22:44:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:20,185 INFO L225 Difference]: With dead ends: 147 [2018-11-06 22:44:20,185 INFO L226 Difference]: Without dead ends: 143 [2018-11-06 22:44:20,185 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:44:20,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-11-06 22:44:20,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2018-11-06 22:44:20,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-11-06 22:44:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-11-06 22:44:20,191 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 73 [2018-11-06 22:44:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:20,191 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-11-06 22:44:20,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:44:20,191 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-11-06 22:44:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-06 22:44:20,192 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:20,192 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:20,192 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:20,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:20,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1113244623, now seen corresponding path program 22 times [2018-11-06 22:44:20,193 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:20,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:20,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:20,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:20,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:20,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:20,785 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:20,794 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:44:20,819 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:44:20,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:20,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:20,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:20,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-06 22:44:20,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:44:20,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:44:20,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:44:20,857 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 25 states. [2018-11-06 22:44:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:21,983 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-11-06 22:44:21,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-06 22:44:21,983 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-11-06 22:44:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:21,984 INFO L225 Difference]: With dead ends: 150 [2018-11-06 22:44:21,984 INFO L226 Difference]: Without dead ends: 146 [2018-11-06 22:44:21,985 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:44:21,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-11-06 22:44:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-11-06 22:44:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-11-06 22:44:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-11-06 22:44:21,990 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 73 [2018-11-06 22:44:21,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:21,990 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-11-06 22:44:21,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:44:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-11-06 22:44:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-11-06 22:44:21,991 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:21,991 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:21,991 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:21,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:21,992 INFO L82 PathProgramCache]: Analyzing trace with hash 2093249196, now seen corresponding path program 23 times [2018-11-06 22:44:21,992 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:21,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:21,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:21,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:21,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:22,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:22,487 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:44:22,501 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown