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/nested_false-unreach-call1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:42:56,163 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:42:56,165 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:42:56,178 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:42:56,178 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:42:56,179 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:42:56,180 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:42:56,182 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:42:56,184 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:42:56,185 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:42:56,186 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:42:56,186 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:42:56,187 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:42:56,188 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:42:56,189 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:42:56,190 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:42:56,191 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:42:56,193 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:42:56,195 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:42:56,196 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:42:56,197 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:42:56,199 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:42:56,201 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 22:42:56,201 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 22:42:56,201 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 22:42:56,202 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 22:42:56,203 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 22:42:56,204 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 22:42:56,205 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 22:42:56,206 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 22:42:56,207 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 22:42:56,207 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-06 22:42:56,210 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 22:42:56,225 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:42:56,225 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:42:56,226 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:42:56,226 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:42:56,227 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:42:56,227 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:42:56,227 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:42:56,227 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:42:56,228 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:42:56,228 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:42:56,228 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:42:56,228 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:42:56,228 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:42:56,229 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:42:56,229 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:42:56,229 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:42:56,229 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:42:56,229 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:42:56,230 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:42:56,230 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:42:56,230 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:42:56,230 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:42:56,231 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:42:56,231 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:42:56,231 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:42:56,231 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:42:56,231 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:42:56,232 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:42:56,276 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:42:56,288 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:42:56,293 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:42:56,296 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:42:56,297 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:42:56,298 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_false-unreach-call1.i [2018-11-06 22:42:56,365 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37c4a9b35/8c6ba49d4f104b028946ab4fd7b3ff55/FLAG713b13f05 [2018-11-06 22:42:56,834 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:42:56,834 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_false-unreach-call1.i [2018-11-06 22:42:56,840 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37c4a9b35/8c6ba49d4f104b028946ab4fd7b3ff55/FLAG713b13f05 [2018-11-06 22:42:56,853 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37c4a9b35/8c6ba49d4f104b028946ab4fd7b3ff55 [2018-11-06 22:42:56,863 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:42:56,864 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:42:56,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:42:56,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:42:56,869 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:42:56,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:56" (1/1) ... [2018-11-06 22:42:56,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e1557a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:56, skipping insertion in model container [2018-11-06 22:42:56,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:56" (1/1) ... [2018-11-06 22:42:56,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:42:56,901 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:42:57,106 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:42:57,110 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:42:57,127 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:42:57,144 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:42:57,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57 WrapperNode [2018-11-06 22:42:57,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:42:57,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:42:57,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:42:57,146 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:42:57,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2018-11-06 22:42:57,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2018-11-06 22:42:57,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:42:57,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:42:57,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:42:57,183 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:42:57,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2018-11-06 22:42:57,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2018-11-06 22:42:57,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2018-11-06 22:42:57,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2018-11-06 22:42:57,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2018-11-06 22:42:57,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2018-11-06 22:42:57,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (1/1) ... [2018-11-06 22:42:57,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:42:57,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:42:57,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:42:57,207 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:42:57,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (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 22:42:57,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:42:57,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:42:57,549 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:42:57,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:57 BoogieIcfgContainer [2018-11-06 22:42:57,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:42:57,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:42:57,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:42:57,554 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:42:57,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:42:56" (1/3) ... [2018-11-06 22:42:57,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b7c6f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:57, skipping insertion in model container [2018-11-06 22:42:57,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:57" (2/3) ... [2018-11-06 22:42:57,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b7c6f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:57, skipping insertion in model container [2018-11-06 22:42:57,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:57" (3/3) ... [2018-11-06 22:42:57,558 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_false-unreach-call1.i [2018-11-06 22:42:57,568 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:42:57,576 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:42:57,593 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:42:57,624 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:42:57,625 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:42:57,625 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:42:57,625 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:42:57,625 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:42:57,625 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:42:57,625 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:42:57,626 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:42:57,626 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:42:57,639 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-11-06 22:42:57,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-11-06 22:42:57,646 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:42:57,647 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-11-06 22:42:57,649 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:42:57,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:42:57,656 INFO L82 PathProgramCache]: Analyzing trace with hash 890214759, now seen corresponding path program 1 times [2018-11-06 22:42:57,658 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:42:57,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:42:57,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:57,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:42:57,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:42:57,762 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 22:42:57,764 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:42:57,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:42:57,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:42:57,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:42:57,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:42:57,783 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2018-11-06 22:42:57,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:42:57,798 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2018-11-06 22:42:57,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:42:57,800 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-11-06 22:42:57,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:42:57,810 INFO L225 Difference]: With dead ends: 28 [2018-11-06 22:42:57,810 INFO L226 Difference]: Without dead ends: 11 [2018-11-06 22:42:57,814 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 22:42:57,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-11-06 22:42:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-11-06 22:42:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-06 22:42:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-11-06 22:42:57,853 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2018-11-06 22:42:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:42:57,854 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-11-06 22:42:57,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:42:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-11-06 22:42:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-11-06 22:42:57,855 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:42:57,855 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:42:57,855 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:42:57,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:42:57,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1805937561, now seen corresponding path program 1 times [2018-11-06 22:42:57,856 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:42:57,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:42:57,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:57,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:42:57,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:42:58,031 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 22:42:58,032 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:42:58,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:42:58,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:42:58,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:42:58,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:42:58,035 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 3 states. [2018-11-06 22:42:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:42:58,129 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-11-06 22:42:58,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:42:58,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-11-06 22:42:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:42:58,131 INFO L225 Difference]: With dead ends: 20 [2018-11-06 22:42:58,131 INFO L226 Difference]: Without dead ends: 16 [2018-11-06 22:42:58,138 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 22:42:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-06 22:42:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2018-11-06 22:42:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-11-06 22:42:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-11-06 22:42:58,146 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 7 [2018-11-06 22:42:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:42:58,146 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-11-06 22:42:58,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:42:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-11-06 22:42:58,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-06 22:42:58,147 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:42:58,147 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:42:58,148 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:42:58,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:42:58,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1845410961, now seen corresponding path program 1 times [2018-11-06 22:42:58,148 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:42:58,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:42:58,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:58,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:42:58,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:42:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:42:58,221 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:42:58,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:42:58,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:42:58,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:42:58,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:42:58,222 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2018-11-06 22:42:58,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:42:58,242 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-11-06 22:42:58,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:42:58,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-11-06 22:42:58,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:42:58,244 INFO L225 Difference]: With dead ends: 24 [2018-11-06 22:42:58,244 INFO L226 Difference]: Without dead ends: 15 [2018-11-06 22:42:58,244 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 22:42:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-06 22:42:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-06 22:42:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-06 22:42:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-11-06 22:42:58,249 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-11-06 22:42:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:42:58,249 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-11-06 22:42:58,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:42:58,250 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-11-06 22:42:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-06 22:42:58,250 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:42:58,250 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:42:58,251 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:42:58,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:42:58,251 INFO L82 PathProgramCache]: Analyzing trace with hash 788746549, now seen corresponding path program 1 times [2018-11-06 22:42:58,252 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:42:58,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:42:58,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:58,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:42:58,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:42:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:42:58,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:42:58,355 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 22:42:58,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:42:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:42:58,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:42:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:42:58,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:42:58,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2018-11-06 22:42:58,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:42:58,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:42:58,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:42:58,528 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2018-11-06 22:42:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:42:59,031 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2018-11-06 22:42:59,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:42:59,032 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-11-06 22:42:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:42:59,033 INFO L225 Difference]: With dead ends: 44 [2018-11-06 22:42:59,033 INFO L226 Difference]: Without dead ends: 33 [2018-11-06 22:42:59,034 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:42:59,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-06 22:42:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-11-06 22:42:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-06 22:42:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-11-06 22:42:59,040 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2018-11-06 22:42:59,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:42:59,041 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-11-06 22:42:59,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:42:59,041 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-11-06 22:42:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-06 22:42:59,042 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:42:59,042 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:42:59,042 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:42:59,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:42:59,043 INFO L82 PathProgramCache]: Analyzing trace with hash -812226087, now seen corresponding path program 2 times [2018-11-06 22:42:59,043 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:42:59,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:42:59,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:59,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:42:59,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:42:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-06 22:42:59,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:42:59,150 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 22:42:59,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:42:59,181 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:42:59,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:42:59,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:42:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-06 22:42:59,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:42:59,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-11-06 22:42:59,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:42:59,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:42:59,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:42:59,337 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2018-11-06 22:43:00,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:00,139 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2018-11-06 22:43:00,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:43:00,140 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2018-11-06 22:43:00,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:00,141 INFO L225 Difference]: With dead ends: 66 [2018-11-06 22:43:00,141 INFO L226 Difference]: Without dead ends: 50 [2018-11-06 22:43:00,143 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:43:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-06 22:43:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2018-11-06 22:43:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-11-06 22:43:00,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-11-06 22:43:00,153 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 25 [2018-11-06 22:43:00,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:00,153 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-11-06 22:43:00,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:43:00,153 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-11-06 22:43:00,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-06 22:43:00,155 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:00,155 INFO L375 BasicCegarLoop]: trace histogram [12, 9, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:00,155 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:00,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:00,156 INFO L82 PathProgramCache]: Analyzing trace with hash -264218303, now seen corresponding path program 3 times [2018-11-06 22:43:00,156 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:00,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:00,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:00,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:00,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-11-06 22:43:00,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:00,268 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:43:00,286 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:43:00,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-06 22:43:00,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:00,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 72 proven. 12 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-11-06 22:43:00,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:00,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-06 22:43:00,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 22:43:00,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 22:43:00,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:43:00,377 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 6 states. [2018-11-06 22:43:00,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:00,467 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2018-11-06 22:43:00,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:43:00,469 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2018-11-06 22:43:00,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:00,470 INFO L225 Difference]: With dead ends: 76 [2018-11-06 22:43:00,471 INFO L226 Difference]: Without dead ends: 47 [2018-11-06 22:43:00,471 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:43:00,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-06 22:43:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-11-06 22:43:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-06 22:43:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-11-06 22:43:00,480 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2018-11-06 22:43:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:00,480 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-11-06 22:43:00,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 22:43:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-11-06 22:43:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-06 22:43:00,482 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:00,482 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:00,483 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:00,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:00,483 INFO L82 PathProgramCache]: Analyzing trace with hash -247085369, now seen corresponding path program 4 times [2018-11-06 22:43:00,483 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:00,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:00,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:00,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:00,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-11-06 22:43:00,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:00,816 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 22:43:00,830 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:43:00,866 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:43:00,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:00,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-06 22:43:01,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:01,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2018-11-06 22:43:01,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:43:01,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:43:01,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:43:01,106 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 10 states. [2018-11-06 22:43:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:01,311 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2018-11-06 22:43:01,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:43:01,312 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2018-11-06 22:43:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:01,313 INFO L225 Difference]: With dead ends: 75 [2018-11-06 22:43:01,313 INFO L226 Difference]: Without dead ends: 71 [2018-11-06 22:43:01,314 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:43:01,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-06 22:43:01,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2018-11-06 22:43:01,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-06 22:43:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2018-11-06 22:43:01,324 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 46 [2018-11-06 22:43:01,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:01,324 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2018-11-06 22:43:01,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:43:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2018-11-06 22:43:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-06 22:43:01,327 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:01,327 INFO L375 BasicCegarLoop]: trace histogram [20, 16, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:01,327 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:01,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1693294873, now seen corresponding path program 5 times [2018-11-06 22:43:01,328 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:01,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:01,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:01,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:01,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-11-06 22:43:01,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:01,515 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 22:43:01,526 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:43:01,548 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-06 22:43:01,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:01,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:01,683 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 265 proven. 20 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-11-06 22:43:01,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:01,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-11-06 22:43:01,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:43:01,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:43:01,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:43:01,706 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 12 states. [2018-11-06 22:43:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:02,623 INFO L93 Difference]: Finished difference Result 142 states and 158 transitions. [2018-11-06 22:43:02,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-06 22:43:02,624 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2018-11-06 22:43:02,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:02,625 INFO L225 Difference]: With dead ends: 142 [2018-11-06 22:43:02,625 INFO L226 Difference]: Without dead ends: 96 [2018-11-06 22:43:02,627 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:43:02,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-11-06 22:43:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2018-11-06 22:43:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-11-06 22:43:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2018-11-06 22:43:02,640 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 59 [2018-11-06 22:43:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:02,640 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2018-11-06 22:43:02,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:43:02,641 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2018-11-06 22:43:02,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-06 22:43:02,642 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:02,642 INFO L375 BasicCegarLoop]: trace histogram [30, 25, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:02,643 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:02,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:02,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1557677645, now seen corresponding path program 6 times [2018-11-06 22:43:02,643 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:02,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:02,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:02,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:02,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 0 proven. 760 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-11-06 22:43:02,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:02,906 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 22:43:02,916 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:43:03,044 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-11-06 22:43:03,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:03,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 524 proven. 30 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2018-11-06 22:43:03,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:03,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-11-06 22:43:03,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-06 22:43:03,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-06 22:43:03,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:43:03,204 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 14 states. [2018-11-06 22:43:04,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:04,451 INFO L93 Difference]: Finished difference Result 192 states and 211 transitions. [2018-11-06 22:43:04,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-06 22:43:04,452 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2018-11-06 22:43:04,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:04,454 INFO L225 Difference]: With dead ends: 192 [2018-11-06 22:43:04,454 INFO L226 Difference]: Without dead ends: 125 [2018-11-06 22:43:04,456 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=2281, Unknown=0, NotChecked=0, Total=2450 [2018-11-06 22:43:04,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-11-06 22:43:04,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2018-11-06 22:43:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-11-06 22:43:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2018-11-06 22:43:04,471 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 82 [2018-11-06 22:43:04,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:04,471 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2018-11-06 22:43:04,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-06 22:43:04,472 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2018-11-06 22:43:04,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-06 22:43:04,474 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:04,474 INFO L375 BasicCegarLoop]: trace histogram [42, 36, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:04,474 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:04,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:04,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1206872743, now seen corresponding path program 7 times [2018-11-06 22:43:04,475 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:04,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:04,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:04,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:04,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-11-06 22:43:04,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:04,731 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 22:43:04,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:04,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 0 proven. 1569 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-11-06 22:43:05,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:05,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 15 [2018-11-06 22:43:05,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:43:05,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:43:05,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:43:05,306 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand 15 states. [2018-11-06 22:43:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:05,893 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2018-11-06 22:43:05,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:43:05,895 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 109 [2018-11-06 22:43:05,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:05,901 INFO L225 Difference]: With dead ends: 146 [2018-11-06 22:43:05,901 INFO L226 Difference]: Without dead ends: 142 [2018-11-06 22:43:05,901 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:43:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-11-06 22:43:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 127. [2018-11-06 22:43:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-11-06 22:43:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 134 transitions. [2018-11-06 22:43:05,919 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 134 transitions. Word has length 109 [2018-11-06 22:43:05,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:05,920 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 134 transitions. [2018-11-06 22:43:05,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:43:05,920 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 134 transitions. [2018-11-06 22:43:05,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-11-06 22:43:05,922 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:05,922 INFO L375 BasicCegarLoop]: trace histogram [49, 42, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:05,922 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:05,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:05,923 INFO L82 PathProgramCache]: Analyzing trace with hash 505963987, now seen corresponding path program 8 times [2018-11-06 22:43:05,923 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:05,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:05,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:05,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:05,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2429 backedges. 0 proven. 2135 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-11-06 22:43:06,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:06,288 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 22:43:06,296 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:43:06,345 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:43:06,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:06,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2429 backedges. 0 proven. 2135 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-11-06 22:43:06,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:06,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-06 22:43:06,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:43:06,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:43:06,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:43:06,476 INFO L87 Difference]: Start difference. First operand 127 states and 134 transitions. Second operand 10 states. [2018-11-06 22:43:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:06,821 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2018-11-06 22:43:06,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:43:06,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 126 [2018-11-06 22:43:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:06,823 INFO L225 Difference]: With dead ends: 163 [2018-11-06 22:43:06,826 INFO L226 Difference]: Without dead ends: 159 [2018-11-06 22:43:06,826 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:43:06,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-11-06 22:43:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 144. [2018-11-06 22:43:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-11-06 22:43:06,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2018-11-06 22:43:06,854 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 126 [2018-11-06 22:43:06,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:06,854 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2018-11-06 22:43:06,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:43:06,855 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2018-11-06 22:43:06,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-11-06 22:43:06,857 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:06,857 INFO L375 BasicCegarLoop]: trace histogram [56, 48, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:06,857 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:06,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:06,857 INFO L82 PathProgramCache]: Analyzing trace with hash -30386023, now seen corresponding path program 9 times [2018-11-06 22:43:06,858 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:06,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:06,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:06,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:06,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3180 backedges. 0 proven. 2844 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-11-06 22:43:07,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:07,184 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 22:43:07,193 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:43:07,234 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-11-06 22:43:07,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:07,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3180 backedges. 709 proven. 42 refuted. 0 times theorem prover too weak. 2429 trivial. 0 not checked. [2018-11-06 22:43:07,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:07,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2018-11-06 22:43:07,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:43:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:43:07,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:43:07,391 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand 18 states. [2018-11-06 22:43:10,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:10,104 INFO L93 Difference]: Finished difference Result 322 states and 350 transitions. [2018-11-06 22:43:10,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-11-06 22:43:10,105 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 143 [2018-11-06 22:43:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:10,106 INFO L225 Difference]: With dead ends: 322 [2018-11-06 22:43:10,106 INFO L226 Difference]: Without dead ends: 196 [2018-11-06 22:43:10,110 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=285, Invalid=6195, Unknown=0, NotChecked=0, Total=6480 [2018-11-06 22:43:10,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-11-06 22:43:10,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 179. [2018-11-06 22:43:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-11-06 22:43:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 188 transitions. [2018-11-06 22:43:10,129 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 188 transitions. Word has length 143 [2018-11-06 22:43:10,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:10,129 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 188 transitions. [2018-11-06 22:43:10,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:43:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 188 transitions. [2018-11-06 22:43:10,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-11-06 22:43:10,132 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:10,132 INFO L375 BasicCegarLoop]: trace histogram [72, 63, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:10,132 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:10,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:10,133 INFO L82 PathProgramCache]: Analyzing trace with hash -946975655, now seen corresponding path program 10 times [2018-11-06 22:43:10,133 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:10,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:10,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:10,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:10,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5238 backedges. 0 proven. 4734 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2018-11-06 22:43:10,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:10,913 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 22:43:10,927 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:43:10,989 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:43:10,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:10,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5238 backedges. 2620 proven. 56 refuted. 0 times theorem prover too weak. 2562 trivial. 0 not checked. [2018-11-06 22:43:11,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:11,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2018-11-06 22:43:11,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 22:43:11,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 22:43:11,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:43:11,202 INFO L87 Difference]: Start difference. First operand 179 states and 188 transitions. Second operand 20 states. [2018-11-06 22:43:13,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:13,784 INFO L93 Difference]: Finished difference Result 396 states and 427 transitions. [2018-11-06 22:43:13,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-11-06 22:43:13,789 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 178 [2018-11-06 22:43:13,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:13,790 INFO L225 Difference]: With dead ends: 396 [2018-11-06 22:43:13,791 INFO L226 Difference]: Without dead ends: 237 [2018-11-06 22:43:13,797 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=357, Invalid=9543, Unknown=0, NotChecked=0, Total=9900 [2018-11-06 22:43:13,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-11-06 22:43:13,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 218. [2018-11-06 22:43:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-11-06 22:43:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 228 transitions. [2018-11-06 22:43:13,818 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 228 transitions. Word has length 178 [2018-11-06 22:43:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:13,819 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 228 transitions. [2018-11-06 22:43:13,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 22:43:13,819 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 228 transitions. [2018-11-06 22:43:13,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-11-06 22:43:13,821 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:13,821 INFO L375 BasicCegarLoop]: trace histogram [90, 80, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:13,822 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:13,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:13,822 INFO L82 PathProgramCache]: Analyzing trace with hash -849417639, now seen corresponding path program 11 times [2018-11-06 22:43:13,822 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:13,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:13,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:13,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:13,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8165 backedges. 0 proven. 7445 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-11-06 22:43:14,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:14,203 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 22:43:14,212 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:43:14,974 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-06 22:43:14,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:14,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8165 backedges. 3790 proven. 72 refuted. 0 times theorem prover too weak. 4303 trivial. 0 not checked. [2018-11-06 22:43:15,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:15,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2018-11-06 22:43:15,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:43:15,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:43:15,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:43:15,177 INFO L87 Difference]: Start difference. First operand 218 states and 228 transitions. Second operand 22 states. [2018-11-06 22:43:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:19,673 INFO L93 Difference]: Finished difference Result 478 states and 512 transitions. [2018-11-06 22:43:19,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-11-06 22:43:19,674 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 217 [2018-11-06 22:43:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:19,675 INFO L225 Difference]: With dead ends: 478 [2018-11-06 22:43:19,675 INFO L226 Difference]: Without dead ends: 282 [2018-11-06 22:43:19,680 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=437, Invalid=14083, Unknown=0, NotChecked=0, Total=14520 [2018-11-06 22:43:19,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-11-06 22:43:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 261. [2018-11-06 22:43:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-11-06 22:43:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 272 transitions. [2018-11-06 22:43:19,699 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 272 transitions. Word has length 217 [2018-11-06 22:43:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:19,699 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 272 transitions. [2018-11-06 22:43:19,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:43:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 272 transitions. [2018-11-06 22:43:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-11-06 22:43:19,702 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:19,702 INFO L375 BasicCegarLoop]: trace histogram [110, 99, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:19,703 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:19,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:19,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2120796955, now seen corresponding path program 12 times [2018-11-06 22:43:19,703 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:19,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:19,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:19,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:19,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12177 backedges. 0 proven. 11187 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-11-06 22:43:20,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:20,180 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 22:43:20,187 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:43:21,553 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-11-06 22:43:21,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:21,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12177 backedges. 5272 proven. 90 refuted. 0 times theorem prover too weak. 6815 trivial. 0 not checked. [2018-11-06 22:43:21,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:21,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2018-11-06 22:43:21,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-06 22:43:21,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-06 22:43:21,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:43:21,814 INFO L87 Difference]: Start difference. First operand 261 states and 272 transitions. Second operand 24 states. [2018-11-06 22:43:26,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:26,097 INFO L93 Difference]: Finished difference Result 568 states and 605 transitions. [2018-11-06 22:43:26,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-11-06 22:43:26,098 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 260 [2018-11-06 22:43:26,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:26,099 INFO L225 Difference]: With dead ends: 568 [2018-11-06 22:43:26,099 INFO L226 Difference]: Without dead ends: 331 [2018-11-06 22:43:26,105 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7140 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=525, Invalid=20067, Unknown=0, NotChecked=0, Total=20592 [2018-11-06 22:43:26,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-11-06 22:43:26,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 308. [2018-11-06 22:43:26,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-11-06 22:43:26,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 320 transitions. [2018-11-06 22:43:26,127 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 320 transitions. Word has length 260 [2018-11-06 22:43:26,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:26,127 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 320 transitions. [2018-11-06 22:43:26,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-06 22:43:26,128 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 320 transitions. [2018-11-06 22:43:26,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-11-06 22:43:26,131 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:26,132 INFO L375 BasicCegarLoop]: trace histogram [132, 120, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:26,132 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:26,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:26,132 INFO L82 PathProgramCache]: Analyzing trace with hash 984714521, now seen corresponding path program 13 times [2018-11-06 22:43:26,133 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:26,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:26,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:26,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:26,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17514 backedges. 0 proven. 16194 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-11-06 22:43:26,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:26,746 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 22:43:26,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:26,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17514 backedges. 0 proven. 16194 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-11-06 22:43:27,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:27,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-06 22:43:27,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:43:27,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:43:27,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:43:27,026 INFO L87 Difference]: Start difference. First operand 308 states and 320 transitions. Second operand 15 states. [2018-11-06 22:43:27,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:27,302 INFO L93 Difference]: Finished difference Result 360 states and 374 transitions. [2018-11-06 22:43:27,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:43:27,303 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 307 [2018-11-06 22:43:27,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:27,305 INFO L225 Difference]: With dead ends: 360 [2018-11-06 22:43:27,305 INFO L226 Difference]: Without dead ends: 356 [2018-11-06 22:43:27,306 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 307 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:43:27,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-11-06 22:43:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 333. [2018-11-06 22:43:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2018-11-06 22:43:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 346 transitions. [2018-11-06 22:43:27,332 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 346 transitions. Word has length 307 [2018-11-06 22:43:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:27,332 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 346 transitions. [2018-11-06 22:43:27,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:43:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 346 transitions. [2018-11-06 22:43:27,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-11-06 22:43:27,334 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:27,334 INFO L375 BasicCegarLoop]: trace histogram [143, 130, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:27,334 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:27,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:27,335 INFO L82 PathProgramCache]: Analyzing trace with hash -895836117, now seen corresponding path program 14 times [2018-11-06 22:43:27,335 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:27,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:27,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:27,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:27,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20566 backedges. 0 proven. 19136 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-11-06 22:43:27,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:27,873 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:43:27,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:43:27,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:43:27,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:27,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20566 backedges. 0 proven. 19136 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-11-06 22:43:28,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:28,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-06 22:43:28,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:43:28,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:43:28,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:43:28,245 INFO L87 Difference]: Start difference. First operand 333 states and 346 transitions. Second operand 16 states. [2018-11-06 22:43:28,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:28,747 INFO L93 Difference]: Finished difference Result 385 states and 400 transitions. [2018-11-06 22:43:28,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:43:28,748 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 332 [2018-11-06 22:43:28,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:28,750 INFO L225 Difference]: With dead ends: 385 [2018-11-06 22:43:28,750 INFO L226 Difference]: Without dead ends: 381 [2018-11-06 22:43:28,751 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 332 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:43:28,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2018-11-06 22:43:28,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 358. [2018-11-06 22:43:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2018-11-06 22:43:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 372 transitions. [2018-11-06 22:43:28,791 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 372 transitions. Word has length 332 [2018-11-06 22:43:28,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:28,791 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 372 transitions. [2018-11-06 22:43:28,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:43:28,792 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 372 transitions. [2018-11-06 22:43:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-11-06 22:43:28,794 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:28,794 INFO L375 BasicCegarLoop]: trace histogram [154, 140, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:28,794 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:28,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:28,795 INFO L82 PathProgramCache]: Analyzing trace with hash 88393049, now seen corresponding path program 15 times [2018-11-06 22:43:28,795 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:28,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:28,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:28,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:28,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 23863 backedges. 0 proven. 22323 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-11-06 22:43:30,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:30,337 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 22:43:30,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown