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 --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:19:19,449 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:19:19,451 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:19:19,463 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-30 23:19:19,510 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:19:19,534 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:19:19,535 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:19:19,536 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:19:19,536 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:19:19,537 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:19:19,537 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:19:19,537 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:19:19,538 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:19:19,538 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:19:19,538 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:19:19,538 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:19:19,538 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:19:19,538 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:19:19,539 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:19:19,539 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:19:19,539 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:19:19,539 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:19:19,540 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:19:19,541 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:19:19,541 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:19:19,541 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:19:19,541 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:19:19,541 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:19:19,542 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:19:19,542 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:19:19,542 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:19:19,542 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:19:19,543 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:19:19,543 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:19:19,543 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:19:19,589 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:19:19,602 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:19:19,606 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:19:19,608 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:19:19,608 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:19:19,609 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-30 23:19:19,609 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-09-30 23:19:19,659 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:19:19,662 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:19:19,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:19:19,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:19:19,663 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:19:19,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:19" (1/1) ... [2018-09-30 23:19:19,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:19" (1/1) ... [2018-09-30 23:19:19,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:19:19,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:19:19,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:19:19,701 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:19:19,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:19" (1/1) ... [2018-09-30 23:19:19,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:19" (1/1) ... [2018-09-30 23:19:19,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:19" (1/1) ... [2018-09-30 23:19:19,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:19" (1/1) ... [2018-09-30 23:19:19,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:19" (1/1) ... [2018-09-30 23:19:19,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:19" (1/1) ... [2018-09-30 23:19:19,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:19" (1/1) ... [2018-09-30 23:19:19,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:19:19,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:19:19,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:19:19,721 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:19:19,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:19" (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 [2018-09-30 23:19:19,786 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 23:19:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:19:19,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:19:20,075 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:19:20,076 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:19:20 BoogieIcfgContainer [2018-09-30 23:19:20,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:19:20,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:19:20,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:19:20,081 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:19:20,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:19:19" (1/2) ... [2018-09-30 23:19:20,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7ea6e8 and model type down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:19:20, skipping insertion in model container [2018-09-30 23:19:20,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:19:20" (2/2) ... [2018-09-30 23:19:20,085 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-30 23:19:20,095 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:19:20,105 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:19:20,163 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:19:20,164 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:19:20,165 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:19:20,165 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:19:20,165 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:19:20,165 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:19:20,165 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:19:20,166 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:19:20,166 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:19:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-30 23:19:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:19:20,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:20,204 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:19:20,205 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:20,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:20,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1951930377, now seen corresponding path program 1 times [2018-09-30 23:19:20,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:20,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:20,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:20,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:20,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:20,386 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:19:20,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:19:20,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:19:20,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:19:20,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:19:20,418 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-30 23:19:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:20,550 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-09-30 23:19:20,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:19:20,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-09-30 23:19:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:20,562 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:19:20,563 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:19:20,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:19:20,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:19:20,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2018-09-30 23:19:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:19:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2018-09-30 23:19:20,606 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2018-09-30 23:19:20,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:20,606 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2018-09-30 23:19:20,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:19:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2018-09-30 23:19:20,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:19:20,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:20,607 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:19:20,608 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:20,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:20,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1951989959, now seen corresponding path program 1 times [2018-09-30 23:19:20,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:20,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:20,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:20,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:20,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:20,685 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:19:20,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:19:20,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:19:20,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:19:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:19:20,690 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 4 states. [2018-09-30 23:19:20,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:20,769 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2018-09-30 23:19:20,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:19:20,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-09-30 23:19:20,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:20,771 INFO L225 Difference]: With dead ends: 20 [2018-09-30 23:19:20,771 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:19:20,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:19:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:19:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:19:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:19:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2018-09-30 23:19:20,779 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2018-09-30 23:19:20,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:20,780 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2018-09-30 23:19:20,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:19:20,780 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2018-09-30 23:19:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:19:20,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:20,781 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:19:20,781 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:20,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:20,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1455783312, now seen corresponding path program 1 times [2018-09-30 23:19:20,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:20,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:20,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:20,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:20,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 23:19:20,847 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:19:20,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 23:19:20,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:19:20,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:19:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:19:20,848 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2018-09-30 23:19:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:20,915 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-09-30 23:19:20,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:19:20,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-30 23:19:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:20,917 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:19:20,917 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:19:20,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:19:20,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:19:20,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2018-09-30 23:19:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:19:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-09-30 23:19:20,923 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-09-30 23:19:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:20,923 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-09-30 23:19:20,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:19:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-09-30 23:19:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:19:20,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:20,925 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:19:20,925 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:20,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1455723730, now seen corresponding path program 1 times [2018-09-30 23:19:20,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:20,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:20,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:20,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:20,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:20,994 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:19:20,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 23:19:20,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:19:20,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:19:20,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:19:20,996 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2018-09-30 23:19:21,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:21,053 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2018-09-30 23:19:21,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:19:21,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-30 23:19:21,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:21,055 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:19:21,055 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:19:21,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:19:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:19:21,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-30 23:19:21,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:19:21,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-09-30 23:19:21,063 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2018-09-30 23:19:21,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:21,063 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-09-30 23:19:21,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:19:21,064 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-09-30 23:19:21,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:19:21,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:21,064 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:19:21,065 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:21,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:21,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1394403420, now seen corresponding path program 1 times [2018-09-30 23:19:21,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:21,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:21,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:21,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:21,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:21,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:21,172 INFO L227 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 [2018-09-30 23:19:21,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:21,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:21,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:21,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:19:21,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:19:21,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:19:21,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:19:21,280 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2018-09-30 23:19:21,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:21,483 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-09-30 23:19:21,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:19:21,484 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-09-30 23:19:21,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:21,485 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:19:21,485 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 23:19:21,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:19:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 23:19:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 23:19:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:19:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-30 23:19:21,491 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-09-30 23:19:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:21,492 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-30 23:19:21,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:19:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-30 23:19:21,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:19:21,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:21,493 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 23:19:21,494 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:21,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:21,494 INFO L82 PathProgramCache]: Analyzing trace with hash -961145443, now seen corresponding path program 2 times [2018-09-30 23:19:21,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:21,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:21,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:21,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:21,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:21,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:21,590 INFO L227 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 [2018-09-30 23:19:21,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:21,614 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:21,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:21,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:21,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:21,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:19:21,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:19:21,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:19:21,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:19:21,646 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-09-30 23:19:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:21,733 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-09-30 23:19:21,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:19:21,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-09-30 23:19:21,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:21,735 INFO L225 Difference]: With dead ends: 30 [2018-09-30 23:19:21,735 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 23:19:21,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:19:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 23:19:21,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-09-30 23:19:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:19:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-30 23:19:21,745 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2018-09-30 23:19:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:21,745 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-30 23:19:21,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:19:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-30 23:19:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:19:21,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:21,747 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 23:19:21,747 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:21,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:21,747 INFO L82 PathProgramCache]: Analyzing trace with hash -552275309, now seen corresponding path program 3 times [2018-09-30 23:19:21,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:21,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:21,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:21,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:21,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:21,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:21,951 INFO L227 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 [2018-09-30 23:19:21,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:21,997 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:19:21,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:21,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:22,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:22,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:19:22,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:19:22,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:19:22,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:19:22,037 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-09-30 23:19:22,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:22,173 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-09-30 23:19:22,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:19:22,173 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-09-30 23:19:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:22,174 INFO L225 Difference]: With dead ends: 40 [2018-09-30 23:19:22,174 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:19:22,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:19:22,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:19:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:19:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:19:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-30 23:19:22,180 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2018-09-30 23:19:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:22,181 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-30 23:19:22,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:19:22,181 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-30 23:19:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:19:22,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:22,182 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 23:19:22,182 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:22,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:22,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2071906362, now seen corresponding path program 4 times [2018-09-30 23:19:22,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:22,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:22,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:22,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:22,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:22,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:22,272 INFO L227 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 [2018-09-30 23:19:22,286 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:22,298 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:22,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:22,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:22,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:22,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:19:22,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:19:22,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:19:22,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:19:22,330 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2018-09-30 23:19:22,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:22,577 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-09-30 23:19:22,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:19:22,577 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-09-30 23:19:22,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:22,578 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:19:22,579 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:19:22,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:19:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:19:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2018-09-30 23:19:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:19:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-30 23:19:22,586 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2018-09-30 23:19:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:22,586 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-30 23:19:22,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:19:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-30 23:19:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:19:22,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:22,587 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:22,588 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:22,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash -992407888, now seen corresponding path program 5 times [2018-09-30 23:19:22,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:22,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:22,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:22,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:22,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:22,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:22,788 INFO L227 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 [2018-09-30 23:19:22,805 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:22,846 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 23:19:22,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:22,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:22,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:22,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:19:22,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:19:22,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:19:22,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:19:22,882 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-09-30 23:19:23,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:23,178 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-09-30 23:19:23,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:19:23,178 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-30 23:19:23,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:23,179 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:19:23,180 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 23:19:23,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:19:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 23:19:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 23:19:23,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:19:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-30 23:19:23,186 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2018-09-30 23:19:23,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:23,187 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-30 23:19:23,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:19:23,187 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-30 23:19:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:19:23,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:23,188 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 23:19:23,188 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:23,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:23,189 INFO L82 PathProgramCache]: Analyzing trace with hash 390441321, now seen corresponding path program 6 times [2018-09-30 23:19:23,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:23,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:23,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:23,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:23,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:23,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:23,292 INFO L227 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 [2018-09-30 23:19:23,302 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:23,320 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 23:19:23,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:23,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:23,353 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:23,353 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:19:23,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:19:23,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:19:23,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:19:23,354 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2018-09-30 23:19:23,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:23,421 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2018-09-30 23:19:23,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:19:23,421 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-09-30 23:19:23,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:23,422 INFO L225 Difference]: With dead ends: 40 [2018-09-30 23:19:23,422 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 23:19:23,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:19:23,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 23:19:23,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2018-09-30 23:19:23,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:19:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-09-30 23:19:23,438 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2018-09-30 23:19:23,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:23,438 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-09-30 23:19:23,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:19:23,438 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-09-30 23:19:23,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 23:19:23,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:23,439 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-09-30 23:19:23,439 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:23,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:23,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1927135327, now seen corresponding path program 7 times [2018-09-30 23:19:23,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:23,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:23,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:23,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:23,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:23,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:23,616 INFO L227 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 [2018-09-30 23:19:23,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:23,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:23,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:23,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:19:23,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:19:23,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:19:23,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:19:23,681 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2018-09-30 23:19:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:23,969 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-09-30 23:19:23,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:19:23,970 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-09-30 23:19:23,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:23,971 INFO L225 Difference]: With dead ends: 58 [2018-09-30 23:19:23,971 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:19:23,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:19:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:19:23,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:19:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:19:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-30 23:19:23,979 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-09-30 23:19:23,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:23,980 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-30 23:19:23,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:19:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-30 23:19:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:19:23,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:23,981 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2018-09-30 23:19:23,981 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:23,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:23,982 INFO L82 PathProgramCache]: Analyzing trace with hash -906890938, now seen corresponding path program 8 times [2018-09-30 23:19:23,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:23,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:23,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:23,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:23,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:23,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:24,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:24,127 INFO L227 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 [2018-09-30 23:19:24,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:24,172 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:24,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:24,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:24,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:24,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:19:24,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:19:24,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:19:24,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:19:24,211 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2018-09-30 23:19:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:24,332 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-09-30 23:19:24,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:19:24,333 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2018-09-30 23:19:24,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:24,333 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:19:24,333 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:19:24,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:19:24,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:19:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-30 23:19:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:19:24,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-30 23:19:24,342 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2018-09-30 23:19:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:24,343 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-30 23:19:24,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:19:24,343 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-30 23:19:24,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:19:24,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:24,344 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-09-30 23:19:24,345 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:24,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:24,345 INFO L82 PathProgramCache]: Analyzing trace with hash -466038340, now seen corresponding path program 9 times [2018-09-30 23:19:24,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:24,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:24,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:24,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:24,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:24,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:24,510 INFO L227 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 [2018-09-30 23:19:24,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:24,626 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:19:24,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:24,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:24,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:24,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:19:24,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:19:24,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:19:24,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:19:24,677 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 14 states. [2018-09-30 23:19:25,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:25,234 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-09-30 23:19:25,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:19:25,234 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2018-09-30 23:19:25,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:25,235 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:19:25,235 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 23:19:25,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:19:25,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 23:19:25,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 23:19:25,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 23:19:25,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-09-30 23:19:25,250 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2018-09-30 23:19:25,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:25,251 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-09-30 23:19:25,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:19:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-09-30 23:19:25,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:19:25,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:25,252 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2018-09-30 23:19:25,255 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:25,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:25,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1282545973, now seen corresponding path program 10 times [2018-09-30 23:19:25,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:25,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:25,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:25,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:25,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:25,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:25,443 INFO L227 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 [2018-09-30 23:19:25,451 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:25,483 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:25,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:25,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:25,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:25,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:19:25,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:19:25,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:19:25,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:19:25,518 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2018-09-30 23:19:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:25,624 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2018-09-30 23:19:25,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:19:25,624 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-09-30 23:19:25,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:25,625 INFO L225 Difference]: With dead ends: 50 [2018-09-30 23:19:25,625 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 23:19:25,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:19:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 23:19:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2018-09-30 23:19:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 23:19:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-30 23:19:25,637 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2018-09-30 23:19:25,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:25,637 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-30 23:19:25,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:19:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-30 23:19:25,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:19:25,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:25,639 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-09-30 23:19:25,639 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:25,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:25,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1500867115, now seen corresponding path program 11 times [2018-09-30 23:19:25,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:25,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:25,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:25,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:25,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:25,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:25,983 INFO L227 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 [2018-09-30 23:19:25,993 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:26,022 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:19:26,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:26,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:26,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:26,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:19:26,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:19:26,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:19:26,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:19:26,064 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 16 states. [2018-09-30 23:19:26,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:26,508 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2018-09-30 23:19:26,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:19:26,509 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2018-09-30 23:19:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:26,510 INFO L225 Difference]: With dead ends: 76 [2018-09-30 23:19:26,510 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:19:26,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:19:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:19:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:19:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:19:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-30 23:19:26,518 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2018-09-30 23:19:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:26,518 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-30 23:19:26,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:19:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-30 23:19:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:19:26,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:26,519 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2018-09-30 23:19:26,520 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:26,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:26,520 INFO L82 PathProgramCache]: Analyzing trace with hash 594208338, now seen corresponding path program 12 times [2018-09-30 23:19:26,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:26,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:26,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:26,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:26,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:26,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:26,702 INFO L227 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 [2018-09-30 23:19:26,709 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:26,730 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:19:26,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:26,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:26,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:26,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:19:26,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:19:26,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:19:26,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:19:26,770 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2018-09-30 23:19:26,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:26,929 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-09-30 23:19:26,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:19:26,930 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2018-09-30 23:19:26,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:26,930 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:19:26,930 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:19:26,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:19:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:19:26,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2018-09-30 23:19:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:19:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-30 23:19:26,942 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2018-09-30 23:19:26,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:26,942 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-30 23:19:26,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:19:26,942 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-30 23:19:26,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:19:26,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:26,943 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-09-30 23:19:26,944 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:26,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:26,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1054367944, now seen corresponding path program 13 times [2018-09-30 23:19:26,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:26,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:26,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:26,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:26,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:27,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:27,233 INFO L227 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 [2018-09-30 23:19:27,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:27,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:27,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:27,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:19:27,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:19:27,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:19:27,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:19:27,301 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2018-09-30 23:19:27,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:27,758 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-09-30 23:19:27,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:19:27,759 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2018-09-30 23:19:27,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:27,760 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:19:27,760 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 23:19:27,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:19:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 23:19:27,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 23:19:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 23:19:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-30 23:19:27,769 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2018-09-30 23:19:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:27,769 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-30 23:19:27,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:19:27,770 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-30 23:19:27,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 23:19:27,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:27,771 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2018-09-30 23:19:27,771 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:27,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:27,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1098736897, now seen corresponding path program 14 times [2018-09-30 23:19:27,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:27,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:27,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:27,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:27,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:28,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:28,048 INFO L227 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 [2018-09-30 23:19:28,058 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:28,088 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:28,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:28,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:28,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:28,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:19:28,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:19:28,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:19:28,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:19:28,134 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2018-09-30 23:19:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:28,266 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2018-09-30 23:19:28,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:19:28,267 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2018-09-30 23:19:28,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:28,268 INFO L225 Difference]: With dead ends: 60 [2018-09-30 23:19:28,268 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 23:19:28,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:19:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 23:19:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2018-09-30 23:19:28,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 23:19:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-30 23:19:28,277 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2018-09-30 23:19:28,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:28,277 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-30 23:19:28,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:19:28,277 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-30 23:19:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 23:19:28,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:28,278 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-09-30 23:19:28,279 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:28,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:28,279 INFO L82 PathProgramCache]: Analyzing trace with hash -48369673, now seen corresponding path program 15 times [2018-09-30 23:19:28,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:28,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:28,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:28,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:28,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:28,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:28,518 INFO L227 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 [2018-09-30 23:19:28,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:28,560 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:19:28,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:28,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:28,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:28,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:19:28,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:19:28,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:19:28,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:19:28,599 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 20 states. [2018-09-30 23:19:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:29,374 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2018-09-30 23:19:29,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:19:29,374 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2018-09-30 23:19:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:29,375 INFO L225 Difference]: With dead ends: 94 [2018-09-30 23:19:29,375 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:19:29,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:19:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:19:29,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:19:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:19:29,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-09-30 23:19:29,384 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2018-09-30 23:19:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:29,384 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-09-30 23:19:29,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:19:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-09-30 23:19:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:19:29,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:29,386 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2018-09-30 23:19:29,386 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:29,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:29,387 INFO L82 PathProgramCache]: Analyzing trace with hash 239052638, now seen corresponding path program 16 times [2018-09-30 23:19:29,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:29,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:29,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:29,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:29,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:29,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:29,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:29,532 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:29,555 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:29,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:29,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:29,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:29,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:19:29,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:19:29,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:19:29,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:19:29,602 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 12 states. [2018-09-30 23:19:29,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:29,753 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2018-09-30 23:19:29,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:19:29,754 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-09-30 23:19:29,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:29,754 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:19:29,755 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:19:29,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:19:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:19:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-30 23:19:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:19:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-30 23:19:29,763 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2018-09-30 23:19:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:29,763 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-30 23:19:29,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:19:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-30 23:19:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:19:29,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:29,765 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-09-30 23:19:29,765 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:29,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:29,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1074641876, now seen corresponding path program 17 times [2018-09-30 23:19:29,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:29,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:29,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:29,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:29,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:30,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:30,070 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:30,080 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:30,113 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 23:19:30,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:30,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:30,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:30,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:19:30,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:19:30,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:19:30,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:19:30,158 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-09-30 23:19:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:30,768 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-09-30 23:19:30,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:19:30,769 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2018-09-30 23:19:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:30,769 INFO L225 Difference]: With dead ends: 103 [2018-09-30 23:19:30,769 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 23:19:30,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:19:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 23:19:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 23:19:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 23:19:30,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-30 23:19:30,776 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2018-09-30 23:19:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:30,776 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-30 23:19:30,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:19:30,777 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-30 23:19:30,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 23:19:30,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:30,777 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2018-09-30 23:19:30,778 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:30,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:30,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1305899827, now seen corresponding path program 18 times [2018-09-30 23:19:30,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:30,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:30,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:30,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:30,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:31,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:31,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:31,064 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:31,101 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 23:19:31,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:31,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:31,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:31,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 23:19:31,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:19:31,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:19:31,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:19:31,138 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 13 states. [2018-09-30 23:19:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:31,225 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2018-09-30 23:19:31,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:19:31,227 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2018-09-30 23:19:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:31,228 INFO L225 Difference]: With dead ends: 70 [2018-09-30 23:19:31,228 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 23:19:31,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:19:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 23:19:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2018-09-30 23:19:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 23:19:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-09-30 23:19:31,235 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2018-09-30 23:19:31,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:31,235 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-09-30 23:19:31,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:19:31,235 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-09-30 23:19:31,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 23:19:31,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:31,236 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-09-30 23:19:31,236 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:31,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:31,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1754878403, now seen corresponding path program 19 times [2018-09-30 23:19:31,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:31,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:31,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:31,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:31,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:31,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:31,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:31,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:31,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:31,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:31,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:19:31,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:19:31,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:19:31,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:19:31,657 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 24 states. [2018-09-30 23:19:32,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:32,084 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2018-09-30 23:19:32,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:19:32,084 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2018-09-30 23:19:32,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:32,085 INFO L225 Difference]: With dead ends: 112 [2018-09-30 23:19:32,085 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:19:32,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:19:32,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:19:32,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:19:32,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:19:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-30 23:19:32,093 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2018-09-30 23:19:32,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:32,093 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-30 23:19:32,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:19:32,093 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-30 23:19:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:19:32,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:32,094 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2018-09-30 23:19:32,094 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:32,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:32,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1471794070, now seen corresponding path program 20 times [2018-09-30 23:19:32,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:32,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:32,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:32,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:32,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:32,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:32,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:32,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:32,531 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:32,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:32,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:32,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:32,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:19:32,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:19:32,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:19:32,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:19:32,570 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 14 states. [2018-09-30 23:19:32,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:32,714 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-09-30 23:19:32,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:19:32,714 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-09-30 23:19:32,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:32,715 INFO L225 Difference]: With dead ends: 75 [2018-09-30 23:19:32,715 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:19:32,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:19:32,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:19:32,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2018-09-30 23:19:32,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:19:32,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-30 23:19:32,721 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2018-09-30 23:19:32,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:32,721 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-30 23:19:32,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:19:32,722 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-30 23:19:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:19:32,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:32,722 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-09-30 23:19:32,723 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:32,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:32,723 INFO L82 PathProgramCache]: Analyzing trace with hash 716104416, now seen corresponding path program 21 times [2018-09-30 23:19:32,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:32,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:32,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:32,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:32,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:33,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:33,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:33,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:33,079 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 23:19:33,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:33,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:33,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:33,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:19:33,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:19:33,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:19:33,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:19:33,115 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2018-09-30 23:19:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:33,486 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-09-30 23:19:33,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:19:33,487 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-09-30 23:19:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:33,487 INFO L225 Difference]: With dead ends: 121 [2018-09-30 23:19:33,487 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 23:19:33,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:19:33,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 23:19:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 23:19:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 23:19:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-30 23:19:33,494 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-09-30 23:19:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:33,494 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-30 23:19:33,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:19:33,494 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-30 23:19:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 23:19:33,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:33,495 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2018-09-30 23:19:33,495 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:33,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:33,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1699180391, now seen corresponding path program 22 times [2018-09-30 23:19:33,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:33,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:33,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:33,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:33,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:34,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:34,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:34,640 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:34,676 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:34,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:34,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:34,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:34,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 23:19:34,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:19:34,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:19:34,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:19:34,718 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 15 states. [2018-09-30 23:19:34,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:34,820 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2018-09-30 23:19:34,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:19:34,820 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2018-09-30 23:19:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:34,821 INFO L225 Difference]: With dead ends: 80 [2018-09-30 23:19:34,821 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 23:19:34,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:19:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 23:19:34,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2018-09-30 23:19:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 23:19:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-30 23:19:34,829 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2018-09-30 23:19:34,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:34,830 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-30 23:19:34,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:19:34,830 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-30 23:19:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 23:19:34,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:34,831 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-09-30 23:19:34,831 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:34,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:34,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1490448497, now seen corresponding path program 23 times [2018-09-30 23:19:34,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:34,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:34,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:34,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:34,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:35,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:35,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:35,239 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:35,279 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 23:19:35,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:35,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:35,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:35,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:19:35,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:19:35,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:19:35,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:19:35,323 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2018-09-30 23:19:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:35,815 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2018-09-30 23:19:35,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:19:35,816 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2018-09-30 23:19:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:35,817 INFO L225 Difference]: With dead ends: 130 [2018-09-30 23:19:35,817 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:19:35,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:19:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:19:35,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 23:19:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:19:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-09-30 23:19:35,825 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2018-09-30 23:19:35,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:35,825 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-09-30 23:19:35,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:19:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-09-30 23:19:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:19:35,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:35,826 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2018-09-30 23:19:35,826 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:35,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:35,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1188334966, now seen corresponding path program 24 times [2018-09-30 23:19:35,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:35,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:35,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:35,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:35,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:36,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:36,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:36,149 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:36,192 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:19:36,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:36,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:36,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:36,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:19:36,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:19:36,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:19:36,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:19:36,236 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 16 states. [2018-09-30 23:19:36,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:36,326 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2018-09-30 23:19:36,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:19:36,326 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2018-09-30 23:19:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:36,327 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:19:36,327 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:19:36,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:19:36,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:19:36,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-30 23:19:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:19:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-09-30 23:19:36,334 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 68 [2018-09-30 23:19:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:36,335 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-09-30 23:19:36,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:19:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-09-30 23:19:36,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 23:19:36,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:36,336 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-09-30 23:19:36,336 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:36,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:36,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1190013460, now seen corresponding path program 25 times [2018-09-30 23:19:36,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:36,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:36,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:36,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:36,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:37,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:37,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:37,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:37,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:37,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:37,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 23:19:37,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:19:37,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:19:37,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:19:37,420 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 30 states. [2018-09-30 23:19:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:38,170 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-09-30 23:19:38,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:19:38,170 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2018-09-30 23:19:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:38,171 INFO L225 Difference]: With dead ends: 139 [2018-09-30 23:19:38,171 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 23:19:38,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:19:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 23:19:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 23:19:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 23:19:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-30 23:19:38,179 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2018-09-30 23:19:38,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:38,179 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-30 23:19:38,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:19:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-30 23:19:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 23:19:38,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:38,180 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2018-09-30 23:19:38,181 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:38,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:38,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1746112411, now seen corresponding path program 26 times [2018-09-30 23:19:38,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:38,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:38,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:38,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:38,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:38,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:38,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:38,792 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:38,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:38,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:38,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:38,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:38,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:19:38,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:19:38,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:19:38,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:19:38,866 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 17 states. [2018-09-30 23:19:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:38,952 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2018-09-30 23:19:38,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:19:38,952 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2018-09-30 23:19:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:38,953 INFO L225 Difference]: With dead ends: 90 [2018-09-30 23:19:38,954 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 23:19:38,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:19:38,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 23:19:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2018-09-30 23:19:38,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 23:19:38,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-30 23:19:38,961 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2018-09-30 23:19:38,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:38,961 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-30 23:19:38,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:19:38,962 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-30 23:19:38,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 23:19:38,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:38,962 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-09-30 23:19:38,963 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:38,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:38,963 INFO L82 PathProgramCache]: Analyzing trace with hash 613460315, now seen corresponding path program 27 times [2018-09-30 23:19:38,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:38,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:38,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:38,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:38,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:39,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:39,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:39,436 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:39,492 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 23:19:39,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:39,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:39,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:39,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:19:39,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:19:39,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:19:39,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:19:39,529 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 32 states. [2018-09-30 23:19:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:40,125 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2018-09-30 23:19:40,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:19:40,125 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2018-09-30 23:19:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:40,126 INFO L225 Difference]: With dead ends: 148 [2018-09-30 23:19:40,126 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 23:19:40,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:19:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 23:19:40,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 23:19:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 23:19:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-09-30 23:19:40,134 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2018-09-30 23:19:40,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:40,134 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-09-30 23:19:40,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:19:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-09-30 23:19:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 23:19:40,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:40,134 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2018-09-30 23:19:40,135 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:40,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:40,135 INFO L82 PathProgramCache]: Analyzing trace with hash 381727362, now seen corresponding path program 28 times [2018-09-30 23:19:40,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:40,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:40,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:40,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:40,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:40,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:40,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:40,361 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:40,397 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:40,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:40,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:40,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:40,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:19:40,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:19:40,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:19:40,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:19:40,435 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 18 states. [2018-09-30 23:19:40,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:40,522 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2018-09-30 23:19:40,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:19:40,523 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2018-09-30 23:19:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:40,523 INFO L225 Difference]: With dead ends: 95 [2018-09-30 23:19:40,523 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 23:19:40,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:19:40,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 23:19:40,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2018-09-30 23:19:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 23:19:40,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-30 23:19:40,531 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 78 [2018-09-30 23:19:40,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:40,532 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-30 23:19:40,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:19:40,532 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-30 23:19:40,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:19:40,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:40,532 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-09-30 23:19:40,533 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:40,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:40,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1123248904, now seen corresponding path program 29 times [2018-09-30 23:19:40,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:40,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:40,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:40,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:40,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:41,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:41,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:41,040 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:41,089 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 23:19:41,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:41,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:41,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:41,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:19:41,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:19:41,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:19:41,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:19:41,129 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 34 states. [2018-09-30 23:19:41,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:41,943 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-09-30 23:19:41,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:19:41,944 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2018-09-30 23:19:41,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:41,944 INFO L225 Difference]: With dead ends: 157 [2018-09-30 23:19:41,945 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 23:19:41,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1841, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:19:41,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 23:19:41,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 23:19:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 23:19:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-30 23:19:41,955 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2018-09-30 23:19:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:41,955 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-30 23:19:41,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:19:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-30 23:19:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 23:19:41,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:41,956 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2018-09-30 23:19:41,956 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:41,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:41,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1191652401, now seen corresponding path program 30 times [2018-09-30 23:19:41,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:41,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:41,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:41,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:41,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:42,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:42,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:42,434 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:42,488 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 23:19:42,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:42,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:42,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:42,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 23:19:42,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:19:42,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:19:42,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:19:42,536 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 19 states. [2018-09-30 23:19:42,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:42,650 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2018-09-30 23:19:42,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:19:42,651 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-09-30 23:19:42,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:42,652 INFO L225 Difference]: With dead ends: 100 [2018-09-30 23:19:42,652 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 23:19:42,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:19:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 23:19:42,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2018-09-30 23:19:42,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 23:19:42,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-09-30 23:19:42,664 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2018-09-30 23:19:42,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:42,665 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-09-30 23:19:42,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:19:42,665 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-09-30 23:19:42,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 23:19:42,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:42,666 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-09-30 23:19:42,666 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:42,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:42,666 INFO L82 PathProgramCache]: Analyzing trace with hash 219193127, now seen corresponding path program 31 times [2018-09-30 23:19:42,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:42,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:42,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:42,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:42,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:43,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:43,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:43,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:43,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:43,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:43,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 23:19:43,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:19:43,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:19:43,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:19:43,527 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 36 states. [2018-09-30 23:19:44,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:44,185 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2018-09-30 23:19:44,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:19:44,185 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 87 [2018-09-30 23:19:44,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:44,185 INFO L225 Difference]: With dead ends: 166 [2018-09-30 23:19:44,185 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:19:44,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:19:44,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:19:44,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 23:19:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:19:44,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-30 23:19:44,195 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2018-09-30 23:19:44,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:44,195 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-30 23:19:44,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:19:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-30 23:19:44,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 23:19:44,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:44,196 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2018-09-30 23:19:44,196 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:44,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:44,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1134517362, now seen corresponding path program 32 times [2018-09-30 23:19:44,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:44,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:44,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:44,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:44,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:44,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:44,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:44,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:44,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:44,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:44,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:44,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:44,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:19:44,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:19:44,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:19:44,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:19:44,651 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 20 states. [2018-09-30 23:19:44,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:44,757 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-09-30 23:19:44,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:19:44,758 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2018-09-30 23:19:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:44,759 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:19:44,759 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:19:44,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:19:44,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:19:44,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-30 23:19:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 23:19:44,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-30 23:19:44,770 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2018-09-30 23:19:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:44,770 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-30 23:19:44,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:19:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-30 23:19:44,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 23:19:44,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:44,771 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-09-30 23:19:44,771 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:44,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:44,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1074454524, now seen corresponding path program 33 times [2018-09-30 23:19:44,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:44,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:44,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:44,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:44,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:45,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:45,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:45,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:45,493 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 23:19:45,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:45,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:45,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:45,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:19:45,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:19:45,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:19:45,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:19:45,531 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 38 states. [2018-09-30 23:19:46,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:46,738 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-09-30 23:19:46,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:19:46,738 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2018-09-30 23:19:46,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:46,739 INFO L225 Difference]: With dead ends: 175 [2018-09-30 23:19:46,739 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 23:19:46,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:19:46,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 23:19:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 23:19:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 23:19:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-09-30 23:19:46,747 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 92 [2018-09-30 23:19:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:46,748 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-09-30 23:19:46,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:19:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-09-30 23:19:46,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 23:19:46,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:46,749 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2018-09-30 23:19:46,749 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:46,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:46,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1513438211, now seen corresponding path program 34 times [2018-09-30 23:19:46,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:46,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:46,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:46,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:46,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:46,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:46,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:46,999 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:47,039 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:47,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:47,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:47,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:47,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 23:19:47,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:19:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:19:47,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:19:47,083 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 21 states. [2018-09-30 23:19:47,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:47,197 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2018-09-30 23:19:47,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:19:47,198 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2018-09-30 23:19:47,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:47,199 INFO L225 Difference]: With dead ends: 110 [2018-09-30 23:19:47,199 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 23:19:47,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:19:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 23:19:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2018-09-30 23:19:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 23:19:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-30 23:19:47,208 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2018-09-30 23:19:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:47,208 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-30 23:19:47,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:19:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-30 23:19:47,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 23:19:47,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:47,209 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-09-30 23:19:47,209 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:47,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:47,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1385467661, now seen corresponding path program 35 times [2018-09-30 23:19:47,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:47,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:47,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:47,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:47,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:47,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:47,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:47,856 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:19:48,088 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 23:19:48,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:48,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:48,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:48,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:19:48,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:19:48,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:19:48,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:19:48,135 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 40 states. [2018-09-30 23:19:48,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:48,813 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2018-09-30 23:19:48,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:19:48,813 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 97 [2018-09-30 23:19:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:48,814 INFO L225 Difference]: With dead ends: 184 [2018-09-30 23:19:48,814 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 23:19:48,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:19:48,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 23:19:48,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 23:19:48,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:19:48,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-30 23:19:48,824 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 97 [2018-09-30 23:19:48,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:48,824 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-30 23:19:48,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:19:48,824 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-30 23:19:48,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:19:48,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:48,825 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2018-09-30 23:19:48,825 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:48,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:48,826 INFO L82 PathProgramCache]: Analyzing trace with hash -209035110, now seen corresponding path program 36 times [2018-09-30 23:19:48,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:48,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:48,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:48,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:48,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:49,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:49,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:49,161 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:19:49,221 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:19:49,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:49,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:49,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:49,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:19:49,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:19:49,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:19:49,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:19:49,274 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 22 states. [2018-09-30 23:19:50,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:50,497 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2018-09-30 23:19:50,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:19:50,498 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2018-09-30 23:19:50,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:50,499 INFO L225 Difference]: With dead ends: 115 [2018-09-30 23:19:50,499 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 23:19:50,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:19:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 23:19:50,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2018-09-30 23:19:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 23:19:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-30 23:19:50,510 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 98 [2018-09-30 23:19:50,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:50,511 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-30 23:19:50,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:19:50,511 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-30 23:19:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 23:19:50,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:50,511 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-09-30 23:19:50,512 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:50,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:50,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1566476528, now seen corresponding path program 37 times [2018-09-30 23:19:50,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:50,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:50,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:50,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:50,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:51,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:51,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:51,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:51,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:51,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:51,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 23:19:51,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:19:51,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:19:51,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:19:51,233 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 42 states. [2018-09-30 23:19:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:53,195 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-09-30 23:19:53,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:19:53,195 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 102 [2018-09-30 23:19:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:53,196 INFO L225 Difference]: With dead ends: 193 [2018-09-30 23:19:53,196 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 23:19:53,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=921, Invalid=2861, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:19:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 23:19:53,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 23:19:53,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 23:19:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-30 23:19:53,209 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2018-09-30 23:19:53,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:53,209 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-30 23:19:53,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:19:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-30 23:19:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 23:19:53,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:53,210 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2018-09-30 23:19:53,210 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:53,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:53,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1920546761, now seen corresponding path program 38 times [2018-09-30 23:19:53,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:53,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:53,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:53,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:19:53,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:54,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:54,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:54,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:19:54,616 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:19:54,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:54,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:54,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:54,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:19:54,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:19:54,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:19:54,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:19:54,671 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 23 states. [2018-09-30 23:19:54,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:54,829 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2018-09-30 23:19:54,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:19:54,829 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 103 [2018-09-30 23:19:54,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:54,830 INFO L225 Difference]: With dead ends: 120 [2018-09-30 23:19:54,831 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 23:19:54,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:19:54,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 23:19:54,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2018-09-30 23:19:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 23:19:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-30 23:19:54,843 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2018-09-30 23:19:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:54,843 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-30 23:19:54,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:19:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-30 23:19:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 23:19:54,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:54,844 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-09-30 23:19:54,844 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:54,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:54,844 INFO L82 PathProgramCache]: Analyzing trace with hash -756867393, now seen corresponding path program 39 times [2018-09-30 23:19:54,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:54,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:54,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:54,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:54,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:55,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:55,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:55,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:19:55,846 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 23:19:55,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:55,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:55,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:55,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:19:55,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:19:55,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:19:55,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:19:55,906 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 44 states. [2018-09-30 23:19:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:58,223 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2018-09-30 23:19:58,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:19:58,223 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 107 [2018-09-30 23:19:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:58,224 INFO L225 Difference]: With dead ends: 202 [2018-09-30 23:19:58,224 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 23:19:58,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:19:58,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 23:19:58,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 23:19:58,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 23:19:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-09-30 23:19:58,236 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 107 [2018-09-30 23:19:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:58,237 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-09-30 23:19:58,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:19:58,237 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-09-30 23:19:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 23:19:58,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:58,238 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2018-09-30 23:19:58,238 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:58,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:58,238 INFO L82 PathProgramCache]: Analyzing trace with hash 798222758, now seen corresponding path program 40 times [2018-09-30 23:19:58,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:58,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:58,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:58,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:58,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:19:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:59,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:19:59,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:19:59,653 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:19:59,700 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:19:59,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:19:59,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:19:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:19:59,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:19:59,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:19:59,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:19:59,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:19:59,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:19:59,747 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 24 states. [2018-09-30 23:19:59,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:19:59,865 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2018-09-30 23:19:59,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:19:59,866 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 108 [2018-09-30 23:19:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:19:59,866 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:19:59,867 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 23:19:59,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:19:59,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 23:19:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-30 23:19:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:19:59,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-30 23:19:59,876 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 108 [2018-09-30 23:19:59,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:19:59,876 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-30 23:19:59,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:19:59,877 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-30 23:19:59,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 23:19:59,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:19:59,877 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-09-30 23:19:59,878 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:19:59,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:19:59,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1030199836, now seen corresponding path program 41 times [2018-09-30 23:19:59,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:19:59,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:19:59,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:59,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:19:59,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:19:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:00,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:00,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:00,607 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:00,676 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 23:20:00,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:00,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:00,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:00,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:20:00,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:20:00,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:20:00,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:20:00,735 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 46 states. [2018-09-30 23:20:02,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:02,059 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-09-30 23:20:02,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:20:02,059 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 112 [2018-09-30 23:20:02,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:02,060 INFO L225 Difference]: With dead ends: 211 [2018-09-30 23:20:02,060 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 23:20:02,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1101, Invalid=3455, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:20:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 23:20:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 23:20:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 23:20:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-09-30 23:20:02,074 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 112 [2018-09-30 23:20:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:02,075 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-09-30 23:20:02,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:20:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-09-30 23:20:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 23:20:02,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:02,076 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 1, 1, 1, 1, 1] [2018-09-30 23:20:02,076 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:02,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:02,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1949005931, now seen corresponding path program 42 times [2018-09-30 23:20:02,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:02,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:02,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:02,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:02,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:02,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:02,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:02,834 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:02,934 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 23:20:02,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:02,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:02,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:02,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 23:20:02,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:20:02,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:20:02,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:20:02,983 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 25 states. [2018-09-30 23:20:03,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:03,168 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2018-09-30 23:20:03,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:20:03,168 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 113 [2018-09-30 23:20:03,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:03,169 INFO L225 Difference]: With dead ends: 130 [2018-09-30 23:20:03,169 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 23:20:03,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:20:03,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 23:20:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2018-09-30 23:20:03,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 23:20:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-09-30 23:20:03,205 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 113 [2018-09-30 23:20:03,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:03,205 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-09-30 23:20:03,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:20:03,205 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-09-30 23:20:03,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 23:20:03,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:03,206 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-09-30 23:20:03,206 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:03,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:03,206 INFO L82 PathProgramCache]: Analyzing trace with hash 725198987, now seen corresponding path program 43 times [2018-09-30 23:20:03,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:03,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:03,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:03,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:03,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:05,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:05,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:05,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:05,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:05,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:05,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:20:05,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:20:05,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:20:05,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:20:05,129 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 48 states. [2018-09-30 23:20:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:06,325 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2018-09-30 23:20:06,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:20:06,325 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 117 [2018-09-30 23:20:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:06,326 INFO L225 Difference]: With dead ends: 220 [2018-09-30 23:20:06,326 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 23:20:06,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1197, Invalid=3773, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:20:06,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 23:20:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 23:20:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 23:20:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-30 23:20:06,338 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 117 [2018-09-30 23:20:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:06,338 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-30 23:20:06,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:20:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-30 23:20:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 23:20:06,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:06,339 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2018-09-30 23:20:06,339 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:06,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:06,340 INFO L82 PathProgramCache]: Analyzing trace with hash 995311282, now seen corresponding path program 44 times [2018-09-30 23:20:06,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:06,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:06,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:06,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:06,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:06,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:06,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:06,907 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:06,960 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:06,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:06,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:07,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:07,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:20:07,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:20:07,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:20:07,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:20:07,009 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 26 states. [2018-09-30 23:20:07,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:07,158 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-09-30 23:20:07,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:20:07,158 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2018-09-30 23:20:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:07,159 INFO L225 Difference]: With dead ends: 135 [2018-09-30 23:20:07,159 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 23:20:07,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:20:07,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 23:20:07,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2018-09-30 23:20:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 23:20:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-09-30 23:20:07,171 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 118 [2018-09-30 23:20:07,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:07,172 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-09-30 23:20:07,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:20:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-09-30 23:20:07,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 23:20:07,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:07,173 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-09-30 23:20:07,173 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:07,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:07,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1935656, now seen corresponding path program 45 times [2018-09-30 23:20:07,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:07,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:07,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:07,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:07,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:07,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:07,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:07,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:08,072 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 23:20:08,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:08,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:08,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:08,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:20:08,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:20:08,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:20:08,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:20:08,133 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 50 states. [2018-09-30 23:20:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:09,347 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-09-30 23:20:09,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:20:09,347 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 122 [2018-09-30 23:20:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:09,348 INFO L225 Difference]: With dead ends: 229 [2018-09-30 23:20:09,348 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 23:20:09,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1297, Invalid=4105, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:20:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 23:20:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 23:20:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 23:20:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2018-09-30 23:20:09,360 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 122 [2018-09-30 23:20:09,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:09,360 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2018-09-30 23:20:09,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:20:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2018-09-30 23:20:09,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 23:20:09,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:09,361 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1] [2018-09-30 23:20:09,361 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:09,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:09,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1360966497, now seen corresponding path program 46 times [2018-09-30 23:20:09,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:09,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:09,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:09,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:09,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:09,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:09,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:09,889 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:09,949 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:09,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:09,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:10,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:10,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 23:20:10,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:20:10,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:20:10,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:20:10,004 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 27 states. [2018-09-30 23:20:10,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:10,151 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2018-09-30 23:20:10,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:20:10,151 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2018-09-30 23:20:10,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:10,153 INFO L225 Difference]: With dead ends: 140 [2018-09-30 23:20:10,153 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 23:20:10,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:20:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 23:20:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2018-09-30 23:20:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 23:20:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-09-30 23:20:10,164 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2018-09-30 23:20:10,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:10,164 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-09-30 23:20:10,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:20:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-09-30 23:20:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 23:20:10,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:10,165 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-09-30 23:20:10,165 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:10,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:10,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1531900329, now seen corresponding path program 47 times [2018-09-30 23:20:10,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:10,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:10,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:10,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:10,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:11,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:11,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:11,452 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:11,526 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 23:20:11,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:11,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:11,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:11,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:20:11,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:20:11,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:20:11,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:20:11,574 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 52 states. [2018-09-30 23:20:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:13,113 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2018-09-30 23:20:13,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:20:13,113 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 127 [2018-09-30 23:20:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:13,114 INFO L225 Difference]: With dead ends: 238 [2018-09-30 23:20:13,114 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 23:20:13,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1401, Invalid=4451, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:20:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 23:20:13,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 23:20:13,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 23:20:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-30 23:20:13,127 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 127 [2018-09-30 23:20:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:13,127 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-30 23:20:13,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:20:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-30 23:20:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 23:20:13,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:13,128 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 1, 1, 1, 1, 1] [2018-09-30 23:20:13,128 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:13,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:13,129 INFO L82 PathProgramCache]: Analyzing trace with hash -652320834, now seen corresponding path program 48 times [2018-09-30 23:20:13,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:13,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:13,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:13,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:13,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:15,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:15,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:15,248 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:15,326 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 23:20:15,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:15,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:15,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:15,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:20:15,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:20:15,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:20:15,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:20:15,388 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 28 states. [2018-09-30 23:20:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:15,645 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2018-09-30 23:20:15,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:20:15,646 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 128 [2018-09-30 23:20:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:15,647 INFO L225 Difference]: With dead ends: 145 [2018-09-30 23:20:15,647 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 23:20:15,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:20:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 23:20:15,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-30 23:20:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 23:20:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-09-30 23:20:15,661 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 128 [2018-09-30 23:20:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:15,661 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-09-30 23:20:15,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:20:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-09-30 23:20:15,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 23:20:15,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:15,663 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-09-30 23:20:15,663 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:15,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:15,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1843837900, now seen corresponding path program 49 times [2018-09-30 23:20:15,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:15,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:15,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:15,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:15,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:16,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:16,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:16,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:16,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:16,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:16,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 23:20:16,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:20:16,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:20:16,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:20:16,709 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 54 states. [2018-09-30 23:20:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:18,399 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-09-30 23:20:18,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:20:18,400 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 132 [2018-09-30 23:20:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:18,401 INFO L225 Difference]: With dead ends: 247 [2018-09-30 23:20:18,401 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 23:20:18,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1509, Invalid=4811, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:20:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 23:20:18,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 23:20:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 23:20:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-30 23:20:18,412 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-09-30 23:20:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:18,412 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-30 23:20:18,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:20:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-30 23:20:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 23:20:18,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:18,413 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2018-09-30 23:20:18,413 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:18,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:18,413 INFO L82 PathProgramCache]: Analyzing trace with hash 35240749, now seen corresponding path program 50 times [2018-09-30 23:20:18,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:18,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:18,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:18,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:18,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:18,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:18,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:18,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:19,023 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:19,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:19,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:19,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:19,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 23:20:19,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:20:19,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:20:19,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:20:19,085 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 29 states. [2018-09-30 23:20:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:19,954 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2018-09-30 23:20:19,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:20:19,954 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 133 [2018-09-30 23:20:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:19,955 INFO L225 Difference]: With dead ends: 150 [2018-09-30 23:20:19,955 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 23:20:19,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:20:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 23:20:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2018-09-30 23:20:19,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 23:20:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-09-30 23:20:19,972 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 133 [2018-09-30 23:20:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:19,972 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-09-30 23:20:19,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:20:19,972 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-09-30 23:20:19,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 23:20:19,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:19,973 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-09-30 23:20:19,973 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:19,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:19,974 INFO L82 PathProgramCache]: Analyzing trace with hash -838119389, now seen corresponding path program 51 times [2018-09-30 23:20:19,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:19,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:19,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:19,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:19,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:21,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:21,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:21,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:21,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 23:20:21,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:21,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:21,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:21,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 23:20:21,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:20:21,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:20:21,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:20:21,202 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 56 states. [2018-09-30 23:20:22,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:22,892 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2018-09-30 23:20:22,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:20:22,892 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 137 [2018-09-30 23:20:22,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:22,893 INFO L225 Difference]: With dead ends: 256 [2018-09-30 23:20:22,893 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 23:20:22,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:20:22,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 23:20:22,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 23:20:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 23:20:22,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-09-30 23:20:22,909 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 137 [2018-09-30 23:20:22,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:22,909 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-09-30 23:20:22,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:20:22,910 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-09-30 23:20:22,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 23:20:22,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:22,910 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2018-09-30 23:20:22,911 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:22,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:22,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1657490634, now seen corresponding path program 52 times [2018-09-30 23:20:22,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:22,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:22,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:22,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:22,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:23,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:23,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:23,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:23,380 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:23,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:23,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:23,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:23,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 23:20:23,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:20:23,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:20:23,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:20:23,436 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 30 states. [2018-09-30 23:20:23,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:23,591 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2018-09-30 23:20:23,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:20:23,592 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 138 [2018-09-30 23:20:23,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:23,593 INFO L225 Difference]: With dead ends: 155 [2018-09-30 23:20:23,593 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 23:20:23,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:20:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 23:20:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2018-09-30 23:20:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 23:20:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-30 23:20:23,607 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 138 [2018-09-30 23:20:23,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:23,607 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-30 23:20:23,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:20:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-30 23:20:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 23:20:23,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:23,608 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1] [2018-09-30 23:20:23,608 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:23,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:23,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1915800384, now seen corresponding path program 53 times [2018-09-30 23:20:23,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:23,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:23,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:23,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:23,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:24,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:24,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:24,566 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:24,654 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 23:20:24,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:24,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:24,724 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:24,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 23:20:24,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:20:24,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:20:24,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:20:24,726 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 58 states. [2018-09-30 23:20:26,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:26,416 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2018-09-30 23:20:26,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:20:26,416 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 142 [2018-09-30 23:20:26,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:26,417 INFO L225 Difference]: With dead ends: 265 [2018-09-30 23:20:26,417 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 23:20:26,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1737, Invalid=5573, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:20:26,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 23:20:26,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 23:20:26,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 23:20:26,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2018-09-30 23:20:26,429 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 142 [2018-09-30 23:20:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:26,429 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2018-09-30 23:20:26,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:20:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2018-09-30 23:20:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 23:20:26,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:26,430 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 1, 1, 1, 1, 1] [2018-09-30 23:20:26,430 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:26,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash 520593145, now seen corresponding path program 54 times [2018-09-30 23:20:26,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:26,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:26,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:26,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:26,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:26,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:26,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:26,906 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:27,000 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 23:20:27,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:27,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:27,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:27,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 23:20:27,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:20:27,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:20:27,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:20:27,064 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 31 states. [2018-09-30 23:20:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:27,278 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2018-09-30 23:20:27,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:20:27,279 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 143 [2018-09-30 23:20:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:27,279 INFO L225 Difference]: With dead ends: 160 [2018-09-30 23:20:27,279 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 23:20:27,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:20:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 23:20:27,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2018-09-30 23:20:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 23:20:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-09-30 23:20:27,292 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 143 [2018-09-30 23:20:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:27,292 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-09-30 23:20:27,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:20:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-09-30 23:20:27,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 23:20:27,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:27,293 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1] [2018-09-30 23:20:27,293 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:27,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:27,293 INFO L82 PathProgramCache]: Analyzing trace with hash 915041775, now seen corresponding path program 55 times [2018-09-30 23:20:27,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:27,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:27,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:27,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:27,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:28,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:28,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:28,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:28,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:28,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:28,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 23:20:28,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:20:28,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:20:28,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:20:28,574 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 60 states. [2018-09-30 23:20:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:30,346 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2018-09-30 23:20:30,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:20:30,346 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 147 [2018-09-30 23:20:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:30,347 INFO L225 Difference]: With dead ends: 274 [2018-09-30 23:20:30,347 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 23:20:30,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1857, Invalid=5975, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:20:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 23:20:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 23:20:30,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 23:20:30,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-30 23:20:30,360 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 147 [2018-09-30 23:20:30,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:30,360 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-30 23:20:30,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:20:30,361 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-30 23:20:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 23:20:30,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:30,361 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 1, 1, 1, 1, 1] [2018-09-30 23:20:30,361 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:30,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:30,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1773143510, now seen corresponding path program 56 times [2018-09-30 23:20:30,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:30,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:30,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:30,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:30,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:30,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:30,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:30,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:30,845 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:30,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:30,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:30,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:30,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:20:30,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:20:30,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:20:30,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:20:30,893 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 32 states. [2018-09-30 23:20:31,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:31,093 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-09-30 23:20:31,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:20:31,093 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 148 [2018-09-30 23:20:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:31,094 INFO L225 Difference]: With dead ends: 165 [2018-09-30 23:20:31,095 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 23:20:31,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:20:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 23:20:31,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-09-30 23:20:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 23:20:31,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-30 23:20:31,113 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 148 [2018-09-30 23:20:31,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:31,113 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-30 23:20:31,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:20:31,113 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-30 23:20:31,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 23:20:31,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:31,114 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1] [2018-09-30 23:20:31,115 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:31,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:31,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1766187444, now seen corresponding path program 57 times [2018-09-30 23:20:31,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:31,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:31,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:31,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:31,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:32,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:32,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:32,701 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:32,802 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 23:20:32,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:32,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:32,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:32,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 23:20:32,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:20:32,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:20:32,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:20:32,870 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 62 states. [2018-09-30 23:20:33,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:33,832 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2018-09-30 23:20:33,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:20:33,832 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 152 [2018-09-30 23:20:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:33,833 INFO L225 Difference]: With dead ends: 283 [2018-09-30 23:20:33,833 INFO L226 Difference]: Without dead ends: 156 [2018-09-30 23:20:33,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1981, Invalid=6391, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:20:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-30 23:20:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-30 23:20:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-30 23:20:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2018-09-30 23:20:33,847 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 152 [2018-09-30 23:20:33,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:33,847 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2018-09-30 23:20:33,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:20:33,847 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2018-09-30 23:20:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-30 23:20:33,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:33,848 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1] [2018-09-30 23:20:33,848 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:33,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:33,848 INFO L82 PathProgramCache]: Analyzing trace with hash -928358715, now seen corresponding path program 58 times [2018-09-30 23:20:33,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:33,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:33,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:33,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:33,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:34,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:34,283 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:34,293 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:34,364 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:34,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:34,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:34,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:34,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 23:20:34,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:20:34,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:20:34,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:20:34,427 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 33 states. [2018-09-30 23:20:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:34,671 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2018-09-30 23:20:34,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:20:34,671 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 153 [2018-09-30 23:20:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:34,673 INFO L225 Difference]: With dead ends: 170 [2018-09-30 23:20:34,673 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 23:20:34,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:20:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 23:20:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2018-09-30 23:20:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 23:20:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-09-30 23:20:34,692 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 153 [2018-09-30 23:20:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:34,693 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-09-30 23:20:34,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:20:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-09-30 23:20:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-30 23:20:34,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:34,694 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1] [2018-09-30 23:20:34,694 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:34,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:34,694 INFO L82 PathProgramCache]: Analyzing trace with hash -839882821, now seen corresponding path program 59 times [2018-09-30 23:20:34,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:34,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:34,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:34,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:34,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:35,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:35,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:35,847 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:35,941 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 23:20:35,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:35,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:36,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:36,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 23:20:36,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:20:36,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:20:36,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:20:36,028 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 64 states. [2018-09-30 23:20:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:38,168 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2018-09-30 23:20:38,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:20:38,168 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 157 [2018-09-30 23:20:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:38,169 INFO L225 Difference]: With dead ends: 292 [2018-09-30 23:20:38,169 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 23:20:38,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2109, Invalid=6821, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:20:38,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 23:20:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 23:20:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 23:20:38,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-09-30 23:20:38,184 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 157 [2018-09-30 23:20:38,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:38,185 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-09-30 23:20:38,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:20:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-09-30 23:20:38,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 23:20:38,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:38,186 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1, 1, 1] [2018-09-30 23:20:38,186 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:38,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:38,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1453492962, now seen corresponding path program 60 times [2018-09-30 23:20:38,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:38,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:38,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:38,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:38,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:38,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:38,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:38,746 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:38,938 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 23:20:38,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:38,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:38,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:38,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:20:38,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:20:38,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:20:38,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:20:38,989 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 34 states. [2018-09-30 23:20:39,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:39,165 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2018-09-30 23:20:39,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:20:39,165 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 158 [2018-09-30 23:20:39,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:39,167 INFO L225 Difference]: With dead ends: 175 [2018-09-30 23:20:39,167 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 23:20:39,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:20:39,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 23:20:39,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2018-09-30 23:20:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 23:20:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-09-30 23:20:39,187 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 158 [2018-09-30 23:20:39,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:39,188 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-09-30 23:20:39,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:20:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-09-30 23:20:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 23:20:39,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:39,189 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1] [2018-09-30 23:20:39,189 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:39,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:39,190 INFO L82 PathProgramCache]: Analyzing trace with hash 227229016, now seen corresponding path program 61 times [2018-09-30 23:20:39,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:39,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:39,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:39,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:39,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:40,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:40,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:40,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:40,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:40,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:40,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 23:20:40,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:20:40,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:20:40,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:20:40,641 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 66 states. [2018-09-30 23:20:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:42,483 INFO L93 Difference]: Finished difference Result 301 states and 305 transitions. [2018-09-30 23:20:42,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:20:42,483 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 162 [2018-09-30 23:20:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:42,484 INFO L225 Difference]: With dead ends: 301 [2018-09-30 23:20:42,484 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 23:20:42,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2241, Invalid=7265, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:20:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 23:20:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-30 23:20:42,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-30 23:20:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-09-30 23:20:42,507 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 162 [2018-09-30 23:20:42,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:42,507 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-09-30 23:20:42,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:20:42,507 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-09-30 23:20:42,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 23:20:42,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:42,508 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 1, 1, 1, 1, 1] [2018-09-30 23:20:42,508 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:42,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:42,509 INFO L82 PathProgramCache]: Analyzing trace with hash 541325969, now seen corresponding path program 62 times [2018-09-30 23:20:42,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:42,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:42,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:42,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:42,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:43,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:43,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:43,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:43,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:43,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:43,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:43,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:43,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 23:20:43,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:20:43,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:20:43,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:20:43,414 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 35 states. [2018-09-30 23:20:43,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:43,592 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2018-09-30 23:20:43,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:20:43,593 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 163 [2018-09-30 23:20:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:43,593 INFO L225 Difference]: With dead ends: 180 [2018-09-30 23:20:43,593 INFO L226 Difference]: Without dead ends: 174 [2018-09-30 23:20:43,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:20:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-09-30 23:20:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2018-09-30 23:20:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-09-30 23:20:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2018-09-30 23:20:43,608 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 163 [2018-09-30 23:20:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:43,608 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2018-09-30 23:20:43,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:20:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2018-09-30 23:20:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-30 23:20:43,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:43,609 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1] [2018-09-30 23:20:43,610 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:43,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:43,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1149189511, now seen corresponding path program 63 times [2018-09-30 23:20:43,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:43,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:43,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:43,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:43,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:45,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:45,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:45,062 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:45,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 23:20:45,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:45,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:45,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:45,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 23:20:45,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:20:45,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:20:45,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:20:45,232 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 68 states. [2018-09-30 23:20:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:47,422 INFO L93 Difference]: Finished difference Result 310 states and 314 transitions. [2018-09-30 23:20:47,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:20:47,422 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 167 [2018-09-30 23:20:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:47,423 INFO L225 Difference]: With dead ends: 310 [2018-09-30 23:20:47,423 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 23:20:47,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2377, Invalid=7723, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:20:47,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 23:20:47,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 23:20:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 23:20:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-09-30 23:20:47,441 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-09-30 23:20:47,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:47,441 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-09-30 23:20:47,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:20:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-09-30 23:20:47,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 23:20:47,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:47,442 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 1, 1, 1, 1, 1] [2018-09-30 23:20:47,442 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:47,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:47,442 INFO L82 PathProgramCache]: Analyzing trace with hash 167304174, now seen corresponding path program 64 times [2018-09-30 23:20:47,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:47,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:47,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:47,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:47,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:48,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:48,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:48,303 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:48,385 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:48,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:48,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:48,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:48,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 23:20:48,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:20:48,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:20:48,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:20:48,447 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 36 states. [2018-09-30 23:20:48,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:48,655 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2018-09-30 23:20:48,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:20:48,655 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 168 [2018-09-30 23:20:48,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:48,656 INFO L225 Difference]: With dead ends: 185 [2018-09-30 23:20:48,656 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 23:20:48,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:20:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 23:20:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-09-30 23:20:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 23:20:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-30 23:20:48,677 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 168 [2018-09-30 23:20:48,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:48,677 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-30 23:20:48,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:20:48,678 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-30 23:20:48,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 23:20:48,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:48,679 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1] [2018-09-30 23:20:48,679 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:48,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:48,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1678104476, now seen corresponding path program 65 times [2018-09-30 23:20:48,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:48,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:48,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:48,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:48,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:50,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:50,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:50,103 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:50,211 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 23:20:50,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:50,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:50,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:50,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 23:20:50,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:20:50,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:20:50,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:20:50,294 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 70 states. [2018-09-30 23:20:52,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:52,731 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2018-09-30 23:20:52,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:20:52,731 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 172 [2018-09-30 23:20:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:52,732 INFO L225 Difference]: With dead ends: 319 [2018-09-30 23:20:52,733 INFO L226 Difference]: Without dead ends: 176 [2018-09-30 23:20:52,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2517, Invalid=8195, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:20:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-30 23:20:52,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-30 23:20:52,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-30 23:20:52,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-09-30 23:20:52,758 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 172 [2018-09-30 23:20:52,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:52,758 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-09-30 23:20:52,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:20:52,758 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-09-30 23:20:52,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-30 23:20:52,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:52,759 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 1, 1, 1, 1, 1] [2018-09-30 23:20:52,759 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:52,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:52,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1483312547, now seen corresponding path program 66 times [2018-09-30 23:20:52,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:52,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:52,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:52,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:52,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:53,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:53,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:53,552 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:53,665 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 23:20:53,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:53,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:53,718 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:53,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 23:20:53,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:20:53,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:20:53,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:20:53,719 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 37 states. [2018-09-30 23:20:54,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:54,067 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2018-09-30 23:20:54,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:20:54,068 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 173 [2018-09-30 23:20:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:54,069 INFO L225 Difference]: With dead ends: 190 [2018-09-30 23:20:54,069 INFO L226 Difference]: Without dead ends: 184 [2018-09-30 23:20:54,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:20:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-30 23:20:54,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2018-09-30 23:20:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-30 23:20:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2018-09-30 23:20:54,086 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 173 [2018-09-30 23:20:54,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:54,087 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2018-09-30 23:20:54,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:20:54,087 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2018-09-30 23:20:54,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-09-30 23:20:54,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:54,088 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1] [2018-09-30 23:20:54,088 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:54,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:54,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1794699091, now seen corresponding path program 67 times [2018-09-30 23:20:54,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:54,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:54,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:54,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:54,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:55,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:55,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:55,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:55,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:55,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:55,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 23:20:55,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:20:55,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:20:55,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:20:55,660 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand 72 states. [2018-09-30 23:20:58,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:58,451 INFO L93 Difference]: Finished difference Result 328 states and 332 transitions. [2018-09-30 23:20:58,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:20:58,451 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 177 [2018-09-30 23:20:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:58,452 INFO L225 Difference]: With dead ends: 328 [2018-09-30 23:20:58,452 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 23:20:58,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2661, Invalid=8681, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:20:58,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 23:20:58,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 23:20:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 23:20:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-30 23:20:58,468 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 177 [2018-09-30 23:20:58,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:58,469 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-30 23:20:58,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:20:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-30 23:20:58,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 23:20:58,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:58,470 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 1, 1, 1, 1, 1] [2018-09-30 23:20:58,470 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:58,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:58,470 INFO L82 PathProgramCache]: Analyzing trace with hash 2072574202, now seen corresponding path program 68 times [2018-09-30 23:20:58,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:58,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:58,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:58,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:58,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:59,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:59,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:59,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:59,266 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:59,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:59,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:20:59,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:59,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:20:59,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:20:59,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:20:59,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:20:59,322 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 38 states. [2018-09-30 23:20:59,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:59,528 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-09-30 23:20:59,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:20:59,529 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 178 [2018-09-30 23:20:59,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:59,530 INFO L225 Difference]: With dead ends: 195 [2018-09-30 23:20:59,530 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 23:20:59,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:20:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 23:20:59,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2018-09-30 23:20:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 23:20:59,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-30 23:20:59,547 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 178 [2018-09-30 23:20:59,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:59,547 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-30 23:20:59,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:20:59,547 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-30 23:20:59,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 23:20:59,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:59,549 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 1, 1, 1, 1, 1] [2018-09-30 23:20:59,549 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:59,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:59,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1591533424, now seen corresponding path program 69 times [2018-09-30 23:20:59,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:59,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:59,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:59,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:59,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:01,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:01,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:01,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:01,235 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 23:21:01,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:01,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:01,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:01,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 23:21:01,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:21:01,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:21:01,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:21:01,314 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 74 states. [2018-09-30 23:21:04,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:04,246 INFO L93 Difference]: Finished difference Result 337 states and 341 transitions. [2018-09-30 23:21:04,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:21:04,246 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 182 [2018-09-30 23:21:04,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:04,247 INFO L225 Difference]: With dead ends: 337 [2018-09-30 23:21:04,247 INFO L226 Difference]: Without dead ends: 186 [2018-09-30 23:21:04,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2809, Invalid=9181, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:21:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-09-30 23:21:04,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-09-30 23:21:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-09-30 23:21:04,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2018-09-30 23:21:04,281 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 182 [2018-09-30 23:21:04,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:04,281 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2018-09-30 23:21:04,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:21:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2018-09-30 23:21:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-30 23:21:04,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:04,282 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 1, 1, 1, 1, 1] [2018-09-30 23:21:04,282 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:04,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:04,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1595685335, now seen corresponding path program 70 times [2018-09-30 23:21:04,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:04,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:04,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:04,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:04,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:04,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:04,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:05,003 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:05,090 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:05,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:05,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:05,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:05,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 23:21:05,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:21:05,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:21:05,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:21:05,155 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 39 states. [2018-09-30 23:21:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:05,361 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2018-09-30 23:21:05,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:21:05,361 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 183 [2018-09-30 23:21:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:05,362 INFO L225 Difference]: With dead ends: 200 [2018-09-30 23:21:05,362 INFO L226 Difference]: Without dead ends: 194 [2018-09-30 23:21:05,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:21:05,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-30 23:21:05,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2018-09-30 23:21:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-30 23:21:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-09-30 23:21:05,379 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 183 [2018-09-30 23:21:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:05,379 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-09-30 23:21:05,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:21:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-09-30 23:21:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-09-30 23:21:05,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:05,380 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1] [2018-09-30 23:21:05,380 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:05,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:05,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1835041505, now seen corresponding path program 71 times [2018-09-30 23:21:05,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:05,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:05,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:05,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:05,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:06,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:06,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:06,972 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:07,091 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 23:21:07,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:07,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:07,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:07,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 23:21:07,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:21:07,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:21:07,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:21:07,151 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 76 states. [2018-09-30 23:21:10,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:10,160 INFO L93 Difference]: Finished difference Result 346 states and 350 transitions. [2018-09-30 23:21:10,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:21:10,160 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 187 [2018-09-30 23:21:10,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:10,161 INFO L225 Difference]: With dead ends: 346 [2018-09-30 23:21:10,161 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 23:21:10,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2961, Invalid=9695, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:21:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 23:21:10,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 23:21:10,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 23:21:10,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-30 23:21:10,185 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 187 [2018-09-30 23:21:10,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:10,185 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-30 23:21:10,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:21:10,185 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-30 23:21:10,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 23:21:10,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:10,186 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 1, 1, 1, 1, 1] [2018-09-30 23:21:10,187 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:10,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:10,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1521017350, now seen corresponding path program 72 times [2018-09-30 23:21:10,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:10,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:10,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:10,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:10,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:10,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:10,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:10,865 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:10,990 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 23:21:10,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:10,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:11,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:11,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:21:11,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:21:11,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:21:11,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:21:11,059 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 40 states. [2018-09-30 23:21:11,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:11,279 INFO L93 Difference]: Finished difference Result 205 states and 208 transitions. [2018-09-30 23:21:11,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:21:11,279 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 188 [2018-09-30 23:21:11,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:11,280 INFO L225 Difference]: With dead ends: 205 [2018-09-30 23:21:11,280 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 23:21:11,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:21:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 23:21:11,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-09-30 23:21:11,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 23:21:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-09-30 23:21:11,297 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 188 [2018-09-30 23:21:11,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:11,297 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-09-30 23:21:11,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:21:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-09-30 23:21:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 23:21:11,297 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:11,298 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 1, 1, 1, 1, 1] [2018-09-30 23:21:11,298 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:11,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:11,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1787388540, now seen corresponding path program 73 times [2018-09-30 23:21:11,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:11,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:11,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:11,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:11,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:12,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:12,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:12,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:13,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:13,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:13,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 23:21:13,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:21:13,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:21:13,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:21:13,132 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 78 states. [2018-09-30 23:21:15,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:15,774 INFO L93 Difference]: Finished difference Result 355 states and 359 transitions. [2018-09-30 23:21:15,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:21:15,775 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 192 [2018-09-30 23:21:15,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:15,776 INFO L225 Difference]: With dead ends: 355 [2018-09-30 23:21:15,776 INFO L226 Difference]: Without dead ends: 196 [2018-09-30 23:21:15,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3117, Invalid=10223, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:21:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-30 23:21:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-30 23:21:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-30 23:21:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-09-30 23:21:15,798 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 192 [2018-09-30 23:21:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:15,798 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-09-30 23:21:15,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:21:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-09-30 23:21:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-30 23:21:15,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:15,799 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 1, 1, 1, 1, 1] [2018-09-30 23:21:15,800 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:15,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:15,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1861088757, now seen corresponding path program 74 times [2018-09-30 23:21:15,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:15,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:15,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:15,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:15,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:16,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:16,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:16,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:16,619 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:16,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:16,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:16,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:16,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 23:21:16,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:21:16,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:21:16,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:21:16,680 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 41 states. [2018-09-30 23:21:16,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:16,897 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2018-09-30 23:21:16,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:21:16,897 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 193 [2018-09-30 23:21:16,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:16,898 INFO L225 Difference]: With dead ends: 210 [2018-09-30 23:21:16,898 INFO L226 Difference]: Without dead ends: 204 [2018-09-30 23:21:16,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:21:16,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-09-30 23:21:16,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2018-09-30 23:21:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-30 23:21:16,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-09-30 23:21:16,916 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 193 [2018-09-30 23:21:16,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:16,917 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-09-30 23:21:16,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:21:16,917 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-09-30 23:21:16,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-30 23:21:16,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:16,917 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 1, 1, 1, 1, 1] [2018-09-30 23:21:16,918 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:16,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:16,918 INFO L82 PathProgramCache]: Analyzing trace with hash -315300117, now seen corresponding path program 75 times [2018-09-30 23:21:16,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:16,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:16,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:16,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:16,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:19,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:19,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:19,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:19,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 23:21:19,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:19,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:19,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:19,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 23:21:19,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:21:19,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:21:19,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4681, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:21:19,243 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 80 states. [2018-09-30 23:21:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:22,324 INFO L93 Difference]: Finished difference Result 364 states and 368 transitions. [2018-09-30 23:21:22,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:21:22,326 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 197 [2018-09-30 23:21:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:22,328 INFO L225 Difference]: With dead ends: 364 [2018-09-30 23:21:22,328 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 23:21:22,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3277, Invalid=10765, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:21:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 23:21:22,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-30 23:21:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 23:21:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-09-30 23:21:22,353 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 197 [2018-09-30 23:21:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:22,354 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-09-30 23:21:22,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:21:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-09-30 23:21:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 23:21:22,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:22,355 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 1, 1, 1, 1, 1] [2018-09-30 23:21:22,355 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:22,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:22,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1372678382, now seen corresponding path program 76 times [2018-09-30 23:21:22,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:22,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:22,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:22,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:22,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:23,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:23,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:23,063 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:23,161 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:23,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:23,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:23,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:23,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 23:21:23,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:21:23,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:21:23,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:21:23,225 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 42 states. [2018-09-30 23:21:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:23,541 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2018-09-30 23:21:23,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:21:23,552 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 198 [2018-09-30 23:21:23,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:23,553 INFO L225 Difference]: With dead ends: 215 [2018-09-30 23:21:23,553 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 23:21:23,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:21:23,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 23:21:23,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2018-09-30 23:21:23,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 23:21:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-30 23:21:23,578 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 198 [2018-09-30 23:21:23,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:23,579 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-30 23:21:23,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:21:23,579 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-30 23:21:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 23:21:23,580 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:23,580 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 1, 1, 1, 1, 1] [2018-09-30 23:21:23,580 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:23,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:23,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1792389512, now seen corresponding path program 77 times [2018-09-30 23:21:23,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:23,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:23,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:23,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:23,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:25,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:25,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:25,596 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:25,750 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 23:21:25,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:25,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:25,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:25,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 23:21:25,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:21:25,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:21:25,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:21:25,827 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 82 states. [2018-09-30 23:21:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:28,370 INFO L93 Difference]: Finished difference Result 373 states and 377 transitions. [2018-09-30 23:21:28,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:21:28,370 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 202 [2018-09-30 23:21:28,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:28,371 INFO L225 Difference]: With dead ends: 373 [2018-09-30 23:21:28,371 INFO L226 Difference]: Without dead ends: 206 [2018-09-30 23:21:28,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3441, Invalid=11321, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:21:28,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-09-30 23:21:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-09-30 23:21:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-09-30 23:21:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2018-09-30 23:21:28,398 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 202 [2018-09-30 23:21:28,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:28,398 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2018-09-30 23:21:28,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:21:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2018-09-30 23:21:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-30 23:21:28,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:28,399 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 1, 1, 1, 1, 1] [2018-09-30 23:21:28,399 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:28,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:28,400 INFO L82 PathProgramCache]: Analyzing trace with hash -185138751, now seen corresponding path program 78 times [2018-09-30 23:21:28,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:28,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:28,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:28,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:28,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:29,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:29,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:29,476 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:29,610 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 23:21:29,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:29,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:29,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:29,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 23:21:29,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:21:29,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:21:29,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:21:29,694 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand 43 states. [2018-09-30 23:21:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:29,965 INFO L93 Difference]: Finished difference Result 220 states and 223 transitions. [2018-09-30 23:21:29,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:21:29,970 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 203 [2018-09-30 23:21:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:29,971 INFO L225 Difference]: With dead ends: 220 [2018-09-30 23:21:29,971 INFO L226 Difference]: Without dead ends: 214 [2018-09-30 23:21:29,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:21:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-09-30 23:21:29,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2018-09-30 23:21:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-30 23:21:29,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2018-09-30 23:21:29,998 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 203 [2018-09-30 23:21:29,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:29,998 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2018-09-30 23:21:29,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:21:29,999 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2018-09-30 23:21:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-30 23:21:29,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:30,000 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 1, 1, 1, 1, 1] [2018-09-30 23:21:30,000 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:30,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:30,000 INFO L82 PathProgramCache]: Analyzing trace with hash -319083337, now seen corresponding path program 79 times [2018-09-30 23:21:30,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:30,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:30,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:30,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:30,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:32,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:32,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:32,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:32,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:32,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:32,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 23:21:32,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:21:32,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:21:32,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=5167, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:21:32,288 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 84 states. [2018-09-30 23:21:34,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:34,951 INFO L93 Difference]: Finished difference Result 382 states and 386 transitions. [2018-09-30 23:21:34,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:21:34,952 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 207 [2018-09-30 23:21:34,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:34,953 INFO L225 Difference]: With dead ends: 382 [2018-09-30 23:21:34,953 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 23:21:34,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3609, Invalid=11891, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:21:34,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 23:21:34,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 23:21:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 23:21:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-30 23:21:34,973 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 207 [2018-09-30 23:21:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:34,973 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-30 23:21:34,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:21:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-30 23:21:34,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-30 23:21:34,974 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:34,974 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 1, 1, 1, 1, 1] [2018-09-30 23:21:34,974 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:34,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:34,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1953503262, now seen corresponding path program 80 times [2018-09-30 23:21:34,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:34,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:34,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:34,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:34,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:35,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:35,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:35,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:35,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:35,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:35,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:35,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:35,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:21:35,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:21:35,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:21:35,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:21:35,915 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 44 states. [2018-09-30 23:21:36,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:36,158 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2018-09-30 23:21:36,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:21:36,159 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 208 [2018-09-30 23:21:36,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:36,160 INFO L225 Difference]: With dead ends: 225 [2018-09-30 23:21:36,160 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 23:21:36,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:21:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 23:21:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2018-09-30 23:21:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 23:21:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-09-30 23:21:36,180 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 208 [2018-09-30 23:21:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:36,180 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-09-30 23:21:36,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:21:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-09-30 23:21:36,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 23:21:36,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:36,181 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 1, 1, 1, 1, 1] [2018-09-30 23:21:36,181 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:36,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:36,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1125633172, now seen corresponding path program 81 times [2018-09-30 23:21:36,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:36,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:36,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:36,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:36,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:38,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:38,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:38,253 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:38,429 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 23:21:38,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:38,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:38,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:38,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 23:21:38,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:21:38,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:21:38,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:21:38,529 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 86 states. [2018-09-30 23:21:41,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:41,462 INFO L93 Difference]: Finished difference Result 391 states and 395 transitions. [2018-09-30 23:21:41,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:21:41,462 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 212 [2018-09-30 23:21:41,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:41,463 INFO L225 Difference]: With dead ends: 391 [2018-09-30 23:21:41,463 INFO L226 Difference]: Without dead ends: 216 [2018-09-30 23:21:41,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3781, Invalid=12475, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:21:41,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-09-30 23:21:41,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-09-30 23:21:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-09-30 23:21:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2018-09-30 23:21:41,491 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 212 [2018-09-30 23:21:41,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:41,491 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2018-09-30 23:21:41,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:21:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2018-09-30 23:21:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-09-30 23:21:41,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:41,493 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 1, 1, 1, 1, 1] [2018-09-30 23:21:41,493 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:41,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:41,494 INFO L82 PathProgramCache]: Analyzing trace with hash -155129459, now seen corresponding path program 82 times [2018-09-30 23:21:41,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:41,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:41,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:41,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:41,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:42,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:42,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:42,335 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:42,439 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:42,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:42,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:42,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:42,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 23:21:42,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:21:42,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:21:42,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:21:42,508 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand 45 states. [2018-09-30 23:21:42,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:42,826 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2018-09-30 23:21:42,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:21:42,826 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 213 [2018-09-30 23:21:42,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:42,827 INFO L225 Difference]: With dead ends: 230 [2018-09-30 23:21:42,827 INFO L226 Difference]: Without dead ends: 224 [2018-09-30 23:21:42,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:21:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-09-30 23:21:42,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2018-09-30 23:21:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-09-30 23:21:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-09-30 23:21:42,850 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 213 [2018-09-30 23:21:42,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:42,850 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-09-30 23:21:42,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:21:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-09-30 23:21:42,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-30 23:21:42,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:42,851 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 1, 1, 1, 1, 1] [2018-09-30 23:21:42,852 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:42,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:42,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1531687293, now seen corresponding path program 83 times [2018-09-30 23:21:42,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:42,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:42,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:42,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:42,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:45,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:45,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:45,337 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:45,484 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 23:21:45,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:45,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:45,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:45,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 23:21:45,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:21:45,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:21:45,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=5677, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:21:45,556 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 88 states. [2018-09-30 23:21:48,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:48,274 INFO L93 Difference]: Finished difference Result 400 states and 404 transitions. [2018-09-30 23:21:48,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:21:48,275 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 217 [2018-09-30 23:21:48,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:48,276 INFO L225 Difference]: With dead ends: 400 [2018-09-30 23:21:48,276 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 23:21:48,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3957, Invalid=13073, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:21:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 23:21:48,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 23:21:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 23:21:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-09-30 23:21:48,298 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 217 [2018-09-30 23:21:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:48,298 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-09-30 23:21:48,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:21:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-09-30 23:21:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 23:21:48,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:48,299 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 1, 1, 1, 1, 1] [2018-09-30 23:21:48,299 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:48,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:48,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1128490282, now seen corresponding path program 84 times [2018-09-30 23:21:48,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:48,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:48,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:48,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:48,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:49,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:49,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:49,364 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:49,527 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 23:21:49,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:49,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:49,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:49,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:21:49,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:21:49,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:21:49,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:21:49,595 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 46 states. [2018-09-30 23:21:49,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:49,860 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2018-09-30 23:21:49,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:21:49,860 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 218 [2018-09-30 23:21:49,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:49,861 INFO L225 Difference]: With dead ends: 235 [2018-09-30 23:21:49,862 INFO L226 Difference]: Without dead ends: 229 [2018-09-30 23:21:49,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:21:49,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-30 23:21:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2018-09-30 23:21:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-30 23:21:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-09-30 23:21:49,882 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 218 [2018-09-30 23:21:49,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:49,882 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-09-30 23:21:49,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:21:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-09-30 23:21:49,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-30 23:21:49,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:49,883 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 1, 1, 1, 1, 1] [2018-09-30 23:21:49,883 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:49,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:49,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1373260896, now seen corresponding path program 85 times [2018-09-30 23:21:49,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:49,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:49,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:49,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:49,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:52,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:52,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:52,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:52,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:52,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:52,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 23:21:52,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:21:52,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:21:52,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:21:52,328 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 90 states. [2018-09-30 23:21:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:55,377 INFO L93 Difference]: Finished difference Result 409 states and 413 transitions. [2018-09-30 23:21:55,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:21:55,377 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 222 [2018-09-30 23:21:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:55,378 INFO L225 Difference]: With dead ends: 409 [2018-09-30 23:21:55,379 INFO L226 Difference]: Without dead ends: 226 [2018-09-30 23:21:55,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4137, Invalid=13685, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:21:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-09-30 23:21:55,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-09-30 23:21:55,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-09-30 23:21:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2018-09-30 23:21:55,401 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 222 [2018-09-30 23:21:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:55,401 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2018-09-30 23:21:55,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:21:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2018-09-30 23:21:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-09-30 23:21:55,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:55,402 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 1, 1, 1, 1, 1] [2018-09-30 23:21:55,402 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:55,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:55,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2022550873, now seen corresponding path program 86 times [2018-09-30 23:21:55,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:55,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:55,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:55,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:55,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:56,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:56,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:56,292 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:56,396 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:56,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:56,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:56,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:56,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 23:21:56,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:21:56,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:21:56,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:21:56,468 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 47 states. [2018-09-30 23:21:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:56,772 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2018-09-30 23:21:56,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:21:56,772 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 223 [2018-09-30 23:21:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:56,773 INFO L225 Difference]: With dead ends: 240 [2018-09-30 23:21:56,773 INFO L226 Difference]: Without dead ends: 234 [2018-09-30 23:21:56,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:21:56,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-09-30 23:21:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2018-09-30 23:21:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-09-30 23:21:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2018-09-30 23:21:56,796 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 223 [2018-09-30 23:21:56,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:56,796 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2018-09-30 23:21:56,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:21:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2018-09-30 23:21:56,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-09-30 23:21:56,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:56,797 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 1, 1, 1, 1, 1] [2018-09-30 23:21:56,797 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:56,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:56,798 INFO L82 PathProgramCache]: Analyzing trace with hash 664947791, now seen corresponding path program 87 times [2018-09-30 23:21:56,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:56,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:56,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:56,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:56,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:59,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:59,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:59,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:59,392 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 23:21:59,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:59,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:21:59,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:59,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 23:21:59,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:21:59,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:21:59,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:21:59,465 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand 92 states. [2018-09-30 23:22:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:02,618 INFO L93 Difference]: Finished difference Result 418 states and 422 transitions. [2018-09-30 23:22:02,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:22:02,619 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 227 [2018-09-30 23:22:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:02,620 INFO L225 Difference]: With dead ends: 418 [2018-09-30 23:22:02,620 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 23:22:02,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4321, Invalid=14311, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:22:02,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 23:22:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-30 23:22:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-30 23:22:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-09-30 23:22:02,643 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 227 [2018-09-30 23:22:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:02,643 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-09-30 23:22:02,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:22:02,643 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-09-30 23:22:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-30 23:22:02,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:02,644 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 1, 1, 1, 1, 1] [2018-09-30 23:22:02,644 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:02,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash -402751946, now seen corresponding path program 88 times [2018-09-30 23:22:02,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:02,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:02,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:02,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:02,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:03,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:03,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:03,626 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:03,739 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:03,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:03,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:03,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:03,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:22:03,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:22:03,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:22:03,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:22:03,819 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 48 states. [2018-09-30 23:22:04,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:04,167 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2018-09-30 23:22:04,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:22:04,173 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 228 [2018-09-30 23:22:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:04,174 INFO L225 Difference]: With dead ends: 245 [2018-09-30 23:22:04,174 INFO L226 Difference]: Without dead ends: 239 [2018-09-30 23:22:04,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:22:04,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-30 23:22:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2018-09-30 23:22:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 23:22:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2018-09-30 23:22:04,201 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 228 [2018-09-30 23:22:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:04,202 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2018-09-30 23:22:04,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:22:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2018-09-30 23:22:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-30 23:22:04,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:04,203 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 1, 1, 1, 1, 1] [2018-09-30 23:22:04,203 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:04,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:04,203 INFO L82 PathProgramCache]: Analyzing trace with hash -564828500, now seen corresponding path program 89 times [2018-09-30 23:22:04,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:04,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:04,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:04,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:04,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:07,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:07,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:07,033 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:07,201 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 23:22:07,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:07,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:07,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:07,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 23:22:07,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:22:07,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:22:07,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:22:07,279 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand 94 states. [2018-09-30 23:22:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:10,757 INFO L93 Difference]: Finished difference Result 427 states and 431 transitions. [2018-09-30 23:22:10,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:22:10,757 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 232 [2018-09-30 23:22:10,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:10,758 INFO L225 Difference]: With dead ends: 427 [2018-09-30 23:22:10,758 INFO L226 Difference]: Without dead ends: 236 [2018-09-30 23:22:10,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4509, Invalid=14951, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:22:10,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-09-30 23:22:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-09-30 23:22:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-09-30 23:22:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2018-09-30 23:22:10,789 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 232 [2018-09-30 23:22:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:10,789 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2018-09-30 23:22:10,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:22:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2018-09-30 23:22:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-30 23:22:10,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:10,790 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 1, 1, 1, 1, 1] [2018-09-30 23:22:10,790 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:10,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:10,790 INFO L82 PathProgramCache]: Analyzing trace with hash 522145061, now seen corresponding path program 90 times [2018-09-30 23:22:10,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:10,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:10,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:10,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:10,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:11,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:11,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:11,752 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:11,917 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 23:22:11,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:11,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:11,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:11,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 23:22:11,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:22:11,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:22:11,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:22:11,992 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand 49 states. [2018-09-30 23:22:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:12,333 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2018-09-30 23:22:12,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:22:12,333 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 233 [2018-09-30 23:22:12,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:12,335 INFO L225 Difference]: With dead ends: 250 [2018-09-30 23:22:12,335 INFO L226 Difference]: Without dead ends: 244 [2018-09-30 23:22:12,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:22:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-09-30 23:22:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2018-09-30 23:22:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-09-30 23:22:12,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2018-09-30 23:22:12,359 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 233 [2018-09-30 23:22:12,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:12,359 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2018-09-30 23:22:12,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:22:12,359 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2018-09-30 23:22:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-09-30 23:22:12,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:12,360 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 1, 1, 1, 1, 1] [2018-09-30 23:22:12,360 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:12,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:12,360 INFO L82 PathProgramCache]: Analyzing trace with hash -377018853, now seen corresponding path program 91 times [2018-09-30 23:22:12,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:12,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:12,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:12,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:12,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:15,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:15,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:15,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:15,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:15,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:15,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 23:22:15,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:22:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:22:15,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:22:15,888 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand 96 states. [2018-09-30 23:22:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:19,060 INFO L93 Difference]: Finished difference Result 436 states and 440 transitions. [2018-09-30 23:22:19,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:22:19,060 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 237 [2018-09-30 23:22:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:19,061 INFO L225 Difference]: With dead ends: 436 [2018-09-30 23:22:19,061 INFO L226 Difference]: Without dead ends: 241 [2018-09-30 23:22:19,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4701, Invalid=15605, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:22:19,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-30 23:22:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-30 23:22:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-30 23:22:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2018-09-30 23:22:19,096 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 237 [2018-09-30 23:22:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:19,096 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2018-09-30 23:22:19,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:22:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2018-09-30 23:22:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-30 23:22:19,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:19,097 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1, 1] [2018-09-30 23:22:19,097 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:19,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:19,097 INFO L82 PathProgramCache]: Analyzing trace with hash 125264706, now seen corresponding path program 92 times [2018-09-30 23:22:19,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:19,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:19,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:19,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:19,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:20,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:20,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:20,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:20,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:20,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:20,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:20,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:20,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:22:20,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:22:20,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:22:20,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:22:20,621 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand 50 states. [2018-09-30 23:22:20,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:20,974 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2018-09-30 23:22:20,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:22:20,975 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 238 [2018-09-30 23:22:20,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:20,976 INFO L225 Difference]: With dead ends: 255 [2018-09-30 23:22:20,976 INFO L226 Difference]: Without dead ends: 249 [2018-09-30 23:22:20,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:22:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-30 23:22:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2018-09-30 23:22:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 23:22:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2018-09-30 23:22:21,002 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 238 [2018-09-30 23:22:21,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:21,002 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2018-09-30 23:22:21,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:22:21,003 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2018-09-30 23:22:21,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 23:22:21,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:21,004 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 1, 1, 1, 1, 1] [2018-09-30 23:22:21,004 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:21,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:21,004 INFO L82 PathProgramCache]: Analyzing trace with hash 494724536, now seen corresponding path program 93 times [2018-09-30 23:22:21,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:21,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:21,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:21,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:21,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:23,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:23,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:23,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:23,907 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 23:22:23,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:23,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:23,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:23,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 23:22:23,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 23:22:23,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 23:22:23,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:22:23,989 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 98 states. [2018-09-30 23:22:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:27,683 INFO L93 Difference]: Finished difference Result 445 states and 449 transitions. [2018-09-30 23:22:27,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 23:22:27,683 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 242 [2018-09-30 23:22:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:27,684 INFO L225 Difference]: With dead ends: 445 [2018-09-30 23:22:27,684 INFO L226 Difference]: Without dead ends: 246 [2018-09-30 23:22:27,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4897, Invalid=16273, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:22:27,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-09-30 23:22:27,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-09-30 23:22:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-09-30 23:22:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 248 transitions. [2018-09-30 23:22:27,707 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 248 transitions. Word has length 242 [2018-09-30 23:22:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:27,707 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 248 transitions. [2018-09-30 23:22:27,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 23:22:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 248 transitions. [2018-09-30 23:22:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-30 23:22:27,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:27,708 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 1, 1, 1, 1, 1] [2018-09-30 23:22:27,708 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:27,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:27,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1883780879, now seen corresponding path program 94 times [2018-09-30 23:22:27,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:27,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:27,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:27,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:27,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:28,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:28,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:28,790 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:28,906 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:28,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:28,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:28,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:28,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 23:22:28,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:22:28,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:22:28,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:22:28,981 INFO L87 Difference]: Start difference. First operand 246 states and 248 transitions. Second operand 51 states. [2018-09-30 23:22:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:29,292 INFO L93 Difference]: Finished difference Result 260 states and 263 transitions. [2018-09-30 23:22:29,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:22:29,292 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 243 [2018-09-30 23:22:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:29,293 INFO L225 Difference]: With dead ends: 260 [2018-09-30 23:22:29,294 INFO L226 Difference]: Without dead ends: 254 [2018-09-30 23:22:29,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:22:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-09-30 23:22:29,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2018-09-30 23:22:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-09-30 23:22:29,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2018-09-30 23:22:29,319 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 243 [2018-09-30 23:22:29,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:29,319 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2018-09-30 23:22:29,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:22:29,319 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2018-09-30 23:22:29,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-09-30 23:22:29,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:29,320 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 1, 1, 1, 1, 1] [2018-09-30 23:22:29,320 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:29,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:29,320 INFO L82 PathProgramCache]: Analyzing trace with hash 514120679, now seen corresponding path program 95 times [2018-09-30 23:22:29,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:29,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:29,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:29,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:29,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:32,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:32,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:32,381 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:32,566 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 23:22:32,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:32,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:32,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:32,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 23:22:32,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 23:22:32,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 23:22:32,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=7351, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:22:32,650 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand 100 states. [2018-09-30 23:22:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:36,609 INFO L93 Difference]: Finished difference Result 454 states and 458 transitions. [2018-09-30 23:22:36,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 23:22:36,610 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 247 [2018-09-30 23:22:36,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:36,611 INFO L225 Difference]: With dead ends: 454 [2018-09-30 23:22:36,611 INFO L226 Difference]: Without dead ends: 251 [2018-09-30 23:22:36,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5097, Invalid=16955, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 23:22:36,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-30 23:22:36,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-30 23:22:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-30 23:22:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2018-09-30 23:22:36,640 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 247 [2018-09-30 23:22:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:36,640 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2018-09-30 23:22:36,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 23:22:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2018-09-30 23:22:36,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-30 23:22:36,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:36,641 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 1, 1, 1, 1, 1] [2018-09-30 23:22:36,642 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:36,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1107028914, now seen corresponding path program 96 times [2018-09-30 23:22:36,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:36,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:36,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:36,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:36,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:37,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:37,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:37,800 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:37,980 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 23:22:37,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:37,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:38,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:38,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:22:38,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:22:38,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:22:38,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:22:38,060 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand 52 states. [2018-09-30 23:22:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:38,375 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2018-09-30 23:22:38,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:22:38,376 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 248 [2018-09-30 23:22:38,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:38,377 INFO L225 Difference]: With dead ends: 265 [2018-09-30 23:22:38,377 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 23:22:38,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:22:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 23:22:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2018-09-30 23:22:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-30 23:22:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2018-09-30 23:22:38,403 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 248 [2018-09-30 23:22:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:38,403 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2018-09-30 23:22:38,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:22:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2018-09-30 23:22:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-30 23:22:38,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:38,404 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 1, 1, 1, 1, 1] [2018-09-30 23:22:38,404 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:38,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:38,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1827811524, now seen corresponding path program 97 times [2018-09-30 23:22:38,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:38,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:38,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:38,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:38,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:41,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:41,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:41,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:41,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:41,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:41,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 23:22:41,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 23:22:41,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 23:22:41,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:22:41,763 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand 102 states. [2018-09-30 23:22:44,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:44,822 INFO L93 Difference]: Finished difference Result 463 states and 467 transitions. [2018-09-30 23:22:44,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 23:22:44,822 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 252 [2018-09-30 23:22:44,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:44,823 INFO L225 Difference]: With dead ends: 463 [2018-09-30 23:22:44,823 INFO L226 Difference]: Without dead ends: 256 [2018-09-30 23:22:44,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5301, Invalid=17651, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:22:44,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-09-30 23:22:44,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-09-30 23:22:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-09-30 23:22:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2018-09-30 23:22:44,856 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 252 [2018-09-30 23:22:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:44,856 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2018-09-30 23:22:44,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 23:22:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2018-09-30 23:22:44,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-09-30 23:22:44,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:44,858 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 49, 49, 1, 1, 1, 1, 1] [2018-09-30 23:22:44,858 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:44,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:44,858 INFO L82 PathProgramCache]: Analyzing trace with hash -803659587, now seen corresponding path program 98 times [2018-09-30 23:22:44,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:44,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:44,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:44,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:44,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:46,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:46,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:46,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:46,396 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:46,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:46,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:46,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:46,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 23:22:46,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:22:46,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:22:46,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:22:46,477 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand 53 states. [2018-09-30 23:22:46,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:46,800 INFO L93 Difference]: Finished difference Result 270 states and 273 transitions. [2018-09-30 23:22:46,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:22:46,801 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 253 [2018-09-30 23:22:46,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:46,802 INFO L225 Difference]: With dead ends: 270 [2018-09-30 23:22:46,802 INFO L226 Difference]: Without dead ends: 264 [2018-09-30 23:22:46,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:22:46,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-09-30 23:22:46,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2018-09-30 23:22:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-09-30 23:22:46,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 262 transitions. [2018-09-30 23:22:46,838 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 262 transitions. Word has length 253 [2018-09-30 23:22:46,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:46,838 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 262 transitions. [2018-09-30 23:22:46,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:22:46,838 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 262 transitions. [2018-09-30 23:22:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-09-30 23:22:46,839 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:46,839 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 1, 1, 1, 1, 1] [2018-09-30 23:22:46,839 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:46,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:46,840 INFO L82 PathProgramCache]: Analyzing trace with hash 465399219, now seen corresponding path program 99 times [2018-09-30 23:22:46,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:46,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:46,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:46,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:46,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:49,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:49,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:49,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:50,213 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 23:22:50,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:50,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:50,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:50,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 23:22:50,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 23:22:50,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 23:22:50,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2755, Invalid=7957, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:22:50,319 INFO L87 Difference]: Start difference. First operand 260 states and 262 transitions. Second operand 104 states. [2018-09-30 23:22:54,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:54,330 INFO L93 Difference]: Finished difference Result 472 states and 476 transitions. [2018-09-30 23:22:54,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 23:22:54,330 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 257 [2018-09-30 23:22:54,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:54,332 INFO L225 Difference]: With dead ends: 472 [2018-09-30 23:22:54,332 INFO L226 Difference]: Without dead ends: 261 [2018-09-30 23:22:54,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5509, Invalid=18361, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:22:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-09-30 23:22:54,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-09-30 23:22:54,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-09-30 23:22:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2018-09-30 23:22:54,360 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 257 [2018-09-30 23:22:54,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:54,360 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2018-09-30 23:22:54,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 23:22:54,360 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2018-09-30 23:22:54,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-30 23:22:54,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:54,361 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 1, 1, 1, 1, 1] [2018-09-30 23:22:54,361 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:54,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:54,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1064997210, now seen corresponding path program 100 times [2018-09-30 23:22:54,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:54,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:54,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:54,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:54,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:55,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:55,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:55,531 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:55,660 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:55,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:55,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:55,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:55,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 23:22:55,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:22:55,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:22:55,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:22:55,764 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand 54 states. [2018-09-30 23:22:56,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:56,147 INFO L93 Difference]: Finished difference Result 275 states and 278 transitions. [2018-09-30 23:22:56,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:22:56,147 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 258 [2018-09-30 23:22:56,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:56,148 INFO L225 Difference]: With dead ends: 275 [2018-09-30 23:22:56,148 INFO L226 Difference]: Without dead ends: 269 [2018-09-30 23:22:56,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:22:56,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-30 23:22:56,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2018-09-30 23:22:56,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-09-30 23:22:56,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2018-09-30 23:22:56,177 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 258 [2018-09-30 23:22:56,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:56,177 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2018-09-30 23:22:56,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:22:56,178 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2018-09-30 23:22:56,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-30 23:22:56,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:56,179 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 1, 1, 1, 1, 1] [2018-09-30 23:22:56,179 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:56,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:56,179 INFO L82 PathProgramCache]: Analyzing trace with hash 629884880, now seen corresponding path program 101 times [2018-09-30 23:22:56,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:56,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:56,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:56,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:56,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:59,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:59,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:22:59,378 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:59,690 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 23:22:59,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:59,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:22:59,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:59,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 23:22:59,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 23:22:59,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 23:22:59,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:22:59,809 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand 106 states. [2018-09-30 23:23:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:04,130 INFO L93 Difference]: Finished difference Result 481 states and 485 transitions. [2018-09-30 23:23:04,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 23:23:04,130 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 262 [2018-09-30 23:23:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:04,131 INFO L225 Difference]: With dead ends: 481 [2018-09-30 23:23:04,131 INFO L226 Difference]: Without dead ends: 266 [2018-09-30 23:23:04,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5721, Invalid=19085, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:23:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-09-30 23:23:04,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2018-09-30 23:23:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-09-30 23:23:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 268 transitions. [2018-09-30 23:23:04,167 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 268 transitions. Word has length 262 [2018-09-30 23:23:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:04,167 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 268 transitions. [2018-09-30 23:23:04,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 23:23:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 268 transitions. [2018-09-30 23:23:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-09-30 23:23:04,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:04,168 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 51, 51, 1, 1, 1, 1, 1] [2018-09-30 23:23:04,168 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:04,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:04,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1501211511, now seen corresponding path program 102 times [2018-09-30 23:23:04,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:04,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:04,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:04,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:04,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:05,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:05,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:05,473 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:05,674 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-30 23:23:05,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:05,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:05,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:05,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 23:23:05,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:23:05,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:23:05,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:23:05,772 INFO L87 Difference]: Start difference. First operand 266 states and 268 transitions. Second operand 55 states. [2018-09-30 23:23:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:06,210 INFO L93 Difference]: Finished difference Result 280 states and 283 transitions. [2018-09-30 23:23:06,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:23:06,210 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 263 [2018-09-30 23:23:06,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:06,211 INFO L225 Difference]: With dead ends: 280 [2018-09-30 23:23:06,211 INFO L226 Difference]: Without dead ends: 274 [2018-09-30 23:23:06,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:23:06,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-09-30 23:23:06,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2018-09-30 23:23:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-09-30 23:23:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2018-09-30 23:23:06,242 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 263 [2018-09-30 23:23:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:06,242 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2018-09-30 23:23:06,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:23:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2018-09-30 23:23:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-09-30 23:23:06,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:06,243 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 1, 1, 1, 1, 1] [2018-09-30 23:23:06,243 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:06,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:06,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1240278145, now seen corresponding path program 103 times [2018-09-30 23:23:06,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:06,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:06,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:06,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:06,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 5512 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:09,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:09,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:09,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:09,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 5512 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:09,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:09,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 23:23:09,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 23:23:09,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 23:23:09,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2969, Invalid=8587, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:23:09,710 INFO L87 Difference]: Start difference. First operand 270 states and 272 transitions. Second operand 108 states. [2018-09-30 23:23:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:14,175 INFO L93 Difference]: Finished difference Result 490 states and 494 transitions. [2018-09-30 23:23:14,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 23:23:14,175 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 267 [2018-09-30 23:23:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:14,176 INFO L225 Difference]: With dead ends: 490 [2018-09-30 23:23:14,176 INFO L226 Difference]: Without dead ends: 271 [2018-09-30 23:23:14,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5937, Invalid=19823, Unknown=0, NotChecked=0, Total=25760 [2018-09-30 23:23:14,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-30 23:23:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-30 23:23:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-30 23:23:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2018-09-30 23:23:14,206 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 267 [2018-09-30 23:23:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:14,207 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2018-09-30 23:23:14,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 23:23:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2018-09-30 23:23:14,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-30 23:23:14,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:14,208 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 52, 52, 1, 1, 1, 1, 1] [2018-09-30 23:23:14,208 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:14,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:14,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1999690342, now seen corresponding path program 104 times [2018-09-30 23:23:14,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:14,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:14,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:14,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:14,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 1535 proven. 5408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:15,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:15,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:15,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:15,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:15,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:15,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 1535 proven. 5408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:15,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:15,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 23:23:15,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:23:15,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:23:15,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:23:15,754 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand 56 states. [2018-09-30 23:23:16,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:16,116 INFO L93 Difference]: Finished difference Result 285 states and 288 transitions. [2018-09-30 23:23:16,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:23:16,116 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 268 [2018-09-30 23:23:16,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:16,117 INFO L225 Difference]: With dead ends: 285 [2018-09-30 23:23:16,117 INFO L226 Difference]: Without dead ends: 279 [2018-09-30 23:23:16,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:23:16,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-30 23:23:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 275. [2018-09-30 23:23:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-30 23:23:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 277 transitions. [2018-09-30 23:23:16,147 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 277 transitions. Word has length 268 [2018-09-30 23:23:16,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:16,147 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 277 transitions. [2018-09-30 23:23:16,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:23:16,147 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 277 transitions. [2018-09-30 23:23:16,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-09-30 23:23:16,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:16,148 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 53, 1, 1, 1, 1, 1] [2018-09-30 23:23:16,148 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:16,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1751242020, now seen corresponding path program 105 times [2018-09-30 23:23:16,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:16,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:16,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:16,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:16,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7155 backedges. 5724 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:20,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:20,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:20,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:20,345 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 23:23:20,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:20,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7155 backedges. 5724 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:20,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:20,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 23:23:20,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 23:23:20,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 23:23:20,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:23:20,435 INFO L87 Difference]: Start difference. First operand 275 states and 277 transitions. Second operand 110 states. [2018-09-30 23:23:25,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:25,010 INFO L93 Difference]: Finished difference Result 499 states and 503 transitions. [2018-09-30 23:23:25,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:23:25,010 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 272 [2018-09-30 23:23:25,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:25,011 INFO L225 Difference]: With dead ends: 499 [2018-09-30 23:23:25,011 INFO L226 Difference]: Without dead ends: 276 [2018-09-30 23:23:25,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4240 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=6157, Invalid=20575, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:23:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-09-30 23:23:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2018-09-30 23:23:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-09-30 23:23:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 278 transitions. [2018-09-30 23:23:25,043 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 278 transitions. Word has length 272 [2018-09-30 23:23:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:25,043 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 278 transitions. [2018-09-30 23:23:25,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 23:23:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 278 transitions. [2018-09-30 23:23:25,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-09-30 23:23:25,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:25,044 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 53, 53, 1, 1, 1, 1, 1] [2018-09-30 23:23:25,044 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:25,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:25,045 INFO L82 PathProgramCache]: Analyzing trace with hash -104962987, now seen corresponding path program 106 times [2018-09-30 23:23:25,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:25,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:25,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:25,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:25,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 1591 proven. 5618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:26,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:26,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:26,358 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:26,494 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:26,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:26,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 1591 proven. 5618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:26,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:26,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 23:23:26,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:23:26,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:23:26,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:23:26,587 INFO L87 Difference]: Start difference. First operand 276 states and 278 transitions. Second operand 57 states. [2018-09-30 23:23:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:27,039 INFO L93 Difference]: Finished difference Result 290 states and 293 transitions. [2018-09-30 23:23:27,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:23:27,040 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 273 [2018-09-30 23:23:27,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:27,041 INFO L225 Difference]: With dead ends: 290 [2018-09-30 23:23:27,041 INFO L226 Difference]: Without dead ends: 284 [2018-09-30 23:23:27,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:23:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2018-09-30 23:23:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 280. [2018-09-30 23:23:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-09-30 23:23:27,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2018-09-30 23:23:27,071 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 273 [2018-09-30 23:23:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:27,072 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2018-09-30 23:23:27,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:23:27,072 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2018-09-30 23:23:27,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-09-30 23:23:27,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:27,073 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 54, 1, 1, 1, 1, 1] [2018-09-30 23:23:27,073 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:27,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:27,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1553521333, now seen corresponding path program 107 times [2018-09-30 23:23:27,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:27,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:27,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:27,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:27,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7425 backedges. 5940 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:30,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:30,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:30,567 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:23:30,774 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 23:23:30,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:30,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7425 backedges. 5940 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:30,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:30,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 23:23:30,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 23:23:30,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 23:23:30,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3191, Invalid=9241, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:23:30,891 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand 112 states. [2018-09-30 23:23:35,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:35,456 INFO L93 Difference]: Finished difference Result 508 states and 512 transitions. [2018-09-30 23:23:35,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 23:23:35,457 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 277 [2018-09-30 23:23:35,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:35,457 INFO L225 Difference]: With dead ends: 508 [2018-09-30 23:23:35,457 INFO L226 Difference]: Without dead ends: 281 [2018-09-30 23:23:35,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4401 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=6381, Invalid=21341, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 23:23:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-09-30 23:23:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2018-09-30 23:23:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-09-30 23:23:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 283 transitions. [2018-09-30 23:23:35,488 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 283 transitions. Word has length 277 [2018-09-30 23:23:35,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:35,488 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 283 transitions. [2018-09-30 23:23:35,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 23:23:35,488 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 283 transitions. [2018-09-30 23:23:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-30 23:23:35,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:35,489 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 55, 54, 54, 1, 1, 1, 1, 1] [2018-09-30 23:23:35,489 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:35,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:35,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1476595854, now seen corresponding path program 108 times [2018-09-30 23:23:35,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:35,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:35,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:35,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:35,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 1648 proven. 5832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:37,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:37,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:37,110 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:37,340 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 23:23:37,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:37,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 1648 proven. 5832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:37,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:37,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 23:23:37,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:23:37,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:23:37,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:23:37,434 INFO L87 Difference]: Start difference. First operand 281 states and 283 transitions. Second operand 58 states. [2018-09-30 23:23:37,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:37,820 INFO L93 Difference]: Finished difference Result 295 states and 298 transitions. [2018-09-30 23:23:37,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:23:37,821 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 278 [2018-09-30 23:23:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:37,821 INFO L225 Difference]: With dead ends: 295 [2018-09-30 23:23:37,822 INFO L226 Difference]: Without dead ends: 289 [2018-09-30 23:23:37,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:23:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-09-30 23:23:37,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 285. [2018-09-30 23:23:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-09-30 23:23:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 287 transitions. [2018-09-30 23:23:37,854 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 287 transitions. Word has length 278 [2018-09-30 23:23:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:37,854 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 287 transitions. [2018-09-30 23:23:37,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:23:37,855 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 287 transitions. [2018-09-30 23:23:37,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-09-30 23:23:37,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:37,855 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 55, 1, 1, 1, 1, 1] [2018-09-30 23:23:37,856 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:37,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:37,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1426007576, now seen corresponding path program 109 times [2018-09-30 23:23:37,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:37,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:37,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:37,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:37,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7700 backedges. 6160 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:41,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:41,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:41,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:41,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7700 backedges. 6160 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:41,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:41,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 23:23:41,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 23:23:41,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 23:23:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:23:41,630 INFO L87 Difference]: Start difference. First operand 285 states and 287 transitions. Second operand 114 states. [2018-09-30 23:23:46,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:46,370 INFO L93 Difference]: Finished difference Result 517 states and 521 transitions. [2018-09-30 23:23:46,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 23:23:46,371 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 282 [2018-09-30 23:23:46,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:46,371 INFO L225 Difference]: With dead ends: 517 [2018-09-30 23:23:46,371 INFO L226 Difference]: Without dead ends: 286 [2018-09-30 23:23:46,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4565 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=6609, Invalid=22121, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:23:46,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2018-09-30 23:23:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2018-09-30 23:23:46,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-09-30 23:23:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 288 transitions. [2018-09-30 23:23:46,405 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 288 transitions. Word has length 282 [2018-09-30 23:23:46,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:46,405 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 288 transitions. [2018-09-30 23:23:46,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 23:23:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 288 transitions. [2018-09-30 23:23:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-09-30 23:23:46,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:46,406 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 55, 55, 1, 1, 1, 1, 1] [2018-09-30 23:23:46,406 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:46,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash 822497313, now seen corresponding path program 110 times [2018-09-30 23:23:46,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:46,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:46,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:46,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:46,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 1706 proven. 6050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:48,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:48,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:48,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:48,172 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:48,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:48,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 1706 proven. 6050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:48,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:48,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 23:23:48,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:23:48,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:23:48,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:23:48,296 INFO L87 Difference]: Start difference. First operand 286 states and 288 transitions. Second operand 59 states. [2018-09-30 23:23:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:48,734 INFO L93 Difference]: Finished difference Result 300 states and 303 transitions. [2018-09-30 23:23:48,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:23:48,734 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 283 [2018-09-30 23:23:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:48,735 INFO L225 Difference]: With dead ends: 300 [2018-09-30 23:23:48,735 INFO L226 Difference]: Without dead ends: 294 [2018-09-30 23:23:48,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:23:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-09-30 23:23:48,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 290. [2018-09-30 23:23:48,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-09-30 23:23:48,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 292 transitions. [2018-09-30 23:23:48,766 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 292 transitions. Word has length 283 [2018-09-30 23:23:48,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:48,766 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 292 transitions. [2018-09-30 23:23:48,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:23:48,766 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 292 transitions. [2018-09-30 23:23:48,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-09-30 23:23:48,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:48,767 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 56, 1, 1, 1, 1, 1] [2018-09-30 23:23:48,767 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:48,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:48,767 INFO L82 PathProgramCache]: Analyzing trace with hash -637777129, now seen corresponding path program 111 times [2018-09-30 23:23:48,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:48,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:48,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:48,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:48,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7980 backedges. 6384 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:52,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:52,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:52,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:53,123 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-30 23:23:53,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:53,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7980 backedges. 6384 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:53,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:53,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 23:23:53,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 23:23:53,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 23:23:53,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3421, Invalid=9919, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:23:53,220 INFO L87 Difference]: Start difference. First operand 290 states and 292 transitions. Second operand 116 states. [2018-09-30 23:23:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:57,986 INFO L93 Difference]: Finished difference Result 526 states and 530 transitions. [2018-09-30 23:23:57,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 23:23:57,986 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 287 [2018-09-30 23:23:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:57,987 INFO L225 Difference]: With dead ends: 526 [2018-09-30 23:23:57,987 INFO L226 Difference]: Without dead ends: 291 [2018-09-30 23:23:57,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=6841, Invalid=22915, Unknown=0, NotChecked=0, Total=29756 [2018-09-30 23:23:57,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-30 23:23:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-09-30 23:23:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-09-30 23:23:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 293 transitions. [2018-09-30 23:23:58,022 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 293 transitions. Word has length 287 [2018-09-30 23:23:58,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:58,022 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 293 transitions. [2018-09-30 23:23:58,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 23:23:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 293 transitions. [2018-09-30 23:23:58,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-09-30 23:23:58,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:58,023 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 56, 56, 1, 1, 1, 1, 1] [2018-09-30 23:23:58,023 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:58,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash 204787838, now seen corresponding path program 112 times [2018-09-30 23:23:58,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:58,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:58,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:58,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:58,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 1765 proven. 6272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:59,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:59,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:59,447 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:59,588 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:59,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:59,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 1765 proven. 6272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:23:59,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:59,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 23:23:59,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:23:59,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:23:59,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:23:59,716 INFO L87 Difference]: Start difference. First operand 291 states and 293 transitions. Second operand 60 states. [2018-09-30 23:24:00,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:00,082 INFO L93 Difference]: Finished difference Result 305 states and 308 transitions. [2018-09-30 23:24:00,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:24:00,082 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 288 [2018-09-30 23:24:00,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:00,083 INFO L225 Difference]: With dead ends: 305 [2018-09-30 23:24:00,083 INFO L226 Difference]: Without dead ends: 299 [2018-09-30 23:24:00,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:24:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-09-30 23:24:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 295. [2018-09-30 23:24:00,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-09-30 23:24:00,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 297 transitions. [2018-09-30 23:24:00,117 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 297 transitions. Word has length 288 [2018-09-30 23:24:00,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:00,118 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 297 transitions. [2018-09-30 23:24:00,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:24:00,118 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 297 transitions. [2018-09-30 23:24:00,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-09-30 23:24:00,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:00,119 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 57, 1, 1, 1, 1, 1] [2018-09-30 23:24:00,119 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:00,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:00,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2131318004, now seen corresponding path program 113 times [2018-09-30 23:24:00,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:00,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:00,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:00,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:00,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8265 backedges. 6612 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:04,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:04,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:04,412 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:04,626 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-30 23:24:04,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:04,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8265 backedges. 6612 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:04,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:04,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 23:24:04,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 23:24:04,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 23:24:04,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:24:04,724 INFO L87 Difference]: Start difference. First operand 295 states and 297 transitions. Second operand 118 states. [2018-09-30 23:24:08,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:08,546 INFO L93 Difference]: Finished difference Result 535 states and 539 transitions. [2018-09-30 23:24:08,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 23:24:08,546 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 292 [2018-09-30 23:24:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:08,546 INFO L225 Difference]: With dead ends: 535 [2018-09-30 23:24:08,547 INFO L226 Difference]: Without dead ends: 296 [2018-09-30 23:24:08,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4902 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=7077, Invalid=23723, Unknown=0, NotChecked=0, Total=30800 [2018-09-30 23:24:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2018-09-30 23:24:08,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2018-09-30 23:24:08,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-09-30 23:24:08,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 298 transitions. [2018-09-30 23:24:08,581 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 298 transitions. Word has length 292 [2018-09-30 23:24:08,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:08,581 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 298 transitions. [2018-09-30 23:24:08,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 23:24:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 298 transitions. [2018-09-30 23:24:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-09-30 23:24:08,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:08,582 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 58, 57, 57, 1, 1, 1, 1, 1] [2018-09-30 23:24:08,582 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:08,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:08,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1809901587, now seen corresponding path program 114 times [2018-09-30 23:24:08,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:08,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:08,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:08,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:08,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 1825 proven. 6498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:10,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:10,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:10,048 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:10,269 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-30 23:24:10,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:10,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 1825 proven. 6498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:10,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:10,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 23:24:10,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:24:10,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:24:10,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:24:10,366 INFO L87 Difference]: Start difference. First operand 296 states and 298 transitions. Second operand 61 states. [2018-09-30 23:24:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:10,758 INFO L93 Difference]: Finished difference Result 310 states and 313 transitions. [2018-09-30 23:24:10,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:24:10,758 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 293 [2018-09-30 23:24:10,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:10,759 INFO L225 Difference]: With dead ends: 310 [2018-09-30 23:24:10,759 INFO L226 Difference]: Without dead ends: 304 [2018-09-30 23:24:10,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:24:10,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2018-09-30 23:24:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2018-09-30 23:24:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-09-30 23:24:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 302 transitions. [2018-09-30 23:24:10,823 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 302 transitions. Word has length 293 [2018-09-30 23:24:10,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:10,823 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 302 transitions. [2018-09-30 23:24:10,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:24:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 302 transitions. [2018-09-30 23:24:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-09-30 23:24:10,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:10,824 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 58, 1, 1, 1, 1, 1] [2018-09-30 23:24:10,824 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:10,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:10,824 INFO L82 PathProgramCache]: Analyzing trace with hash -258716445, now seen corresponding path program 115 times [2018-09-30 23:24:10,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:10,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:10,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:10,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:10,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8555 backedges. 6844 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:15,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:15,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:15,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:15,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8555 backedges. 6844 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:15,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:15,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 23:24:15,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 23:24:15,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 23:24:15,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=10621, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:24:15,352 INFO L87 Difference]: Start difference. First operand 300 states and 302 transitions. Second operand 120 states. [2018-09-30 23:24:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:20,815 INFO L93 Difference]: Finished difference Result 544 states and 548 transitions. [2018-09-30 23:24:20,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 23:24:20,815 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 297 [2018-09-30 23:24:20,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:20,816 INFO L225 Difference]: With dead ends: 544 [2018-09-30 23:24:20,816 INFO L226 Difference]: Without dead ends: 301 [2018-09-30 23:24:20,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5075 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=7317, Invalid=24545, Unknown=0, NotChecked=0, Total=31862 [2018-09-30 23:24:20,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-09-30 23:24:20,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-09-30 23:24:20,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-09-30 23:24:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 303 transitions. [2018-09-30 23:24:20,863 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 303 transitions. Word has length 297 [2018-09-30 23:24:20,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:20,864 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 303 transitions. [2018-09-30 23:24:20,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 23:24:20,864 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 303 transitions. [2018-09-30 23:24:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-30 23:24:20,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:20,865 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 58, 58, 1, 1, 1, 1, 1] [2018-09-30 23:24:20,865 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:20,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:20,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1974369674, now seen corresponding path program 116 times [2018-09-30 23:24:20,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:20,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:20,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:20,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:20,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 1886 proven. 6728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:22,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:22,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:22,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:22,507 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:22,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:22,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 1886 proven. 6728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:22,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:22,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 23:24:22,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:24:22,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:24:22,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:24:22,603 INFO L87 Difference]: Start difference. First operand 301 states and 303 transitions. Second operand 62 states. [2018-09-30 23:24:23,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:23,111 INFO L93 Difference]: Finished difference Result 315 states and 318 transitions. [2018-09-30 23:24:23,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:24:23,111 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 298 [2018-09-30 23:24:23,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:23,112 INFO L225 Difference]: With dead ends: 315 [2018-09-30 23:24:23,112 INFO L226 Difference]: Without dead ends: 309 [2018-09-30 23:24:23,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:24:23,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-09-30 23:24:23,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 305. [2018-09-30 23:24:23,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-09-30 23:24:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 307 transitions. [2018-09-30 23:24:23,161 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 307 transitions. Word has length 298 [2018-09-30 23:24:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:23,161 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 307 transitions. [2018-09-30 23:24:23,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:24:23,161 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 307 transitions. [2018-09-30 23:24:23,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-30 23:24:23,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:23,163 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 59, 1, 1, 1, 1, 1] [2018-09-30 23:24:23,163 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:23,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:23,163 INFO L82 PathProgramCache]: Analyzing trace with hash 177052672, now seen corresponding path program 117 times [2018-09-30 23:24:23,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:23,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:23,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:23,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:23,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8850 backedges. 7080 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:27,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:27,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:27,200 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:27,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-30 23:24:27,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:27,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8850 backedges. 7080 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:27,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:27,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 23:24:27,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 23:24:27,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 23:24:27,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:24:27,626 INFO L87 Difference]: Start difference. First operand 305 states and 307 transitions. Second operand 122 states. [2018-09-30 23:24:33,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:33,575 INFO L93 Difference]: Finished difference Result 553 states and 557 transitions. [2018-09-30 23:24:33,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 23:24:33,575 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 302 [2018-09-30 23:24:33,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:33,576 INFO L225 Difference]: With dead ends: 553 [2018-09-30 23:24:33,576 INFO L226 Difference]: Without dead ends: 306 [2018-09-30 23:24:33,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5251 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=7561, Invalid=25381, Unknown=0, NotChecked=0, Total=32942 [2018-09-30 23:24:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-09-30 23:24:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2018-09-30 23:24:33,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2018-09-30 23:24:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 308 transitions. [2018-09-30 23:24:33,625 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 308 transitions. Word has length 302 [2018-09-30 23:24:33,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:33,625 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 308 transitions. [2018-09-30 23:24:33,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 23:24:33,625 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 308 transitions. [2018-09-30 23:24:33,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-09-30 23:24:33,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:33,627 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 59, 59, 1, 1, 1, 1, 1] [2018-09-30 23:24:33,627 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:33,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:33,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1421165639, now seen corresponding path program 118 times [2018-09-30 23:24:33,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:33,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:33,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:33,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:33,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 1948 proven. 6962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:35,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:35,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:35,228 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:35,377 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:35,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:35,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 1948 proven. 6962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:35,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:35,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 23:24:35,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:24:35,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:24:35,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:24:35,481 INFO L87 Difference]: Start difference. First operand 306 states and 308 transitions. Second operand 63 states. [2018-09-30 23:24:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:35,885 INFO L93 Difference]: Finished difference Result 320 states and 323 transitions. [2018-09-30 23:24:35,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:24:35,885 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 303 [2018-09-30 23:24:35,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:35,886 INFO L225 Difference]: With dead ends: 320 [2018-09-30 23:24:35,886 INFO L226 Difference]: Without dead ends: 314 [2018-09-30 23:24:35,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:24:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-09-30 23:24:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 310. [2018-09-30 23:24:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2018-09-30 23:24:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 312 transitions. [2018-09-30 23:24:35,922 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 312 transitions. Word has length 303 [2018-09-30 23:24:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:35,923 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 312 transitions. [2018-09-30 23:24:35,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:24:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 312 transitions. [2018-09-30 23:24:35,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-09-30 23:24:35,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:35,924 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 60, 1, 1, 1, 1, 1] [2018-09-30 23:24:35,924 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:35,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:35,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2121345711, now seen corresponding path program 119 times [2018-09-30 23:24:35,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:35,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:35,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:35,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:35,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9150 backedges. 7320 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:40,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:40,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:40,337 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:40,575 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 23:24:40,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:40,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9150 backedges. 7320 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:40,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:40,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 23:24:40,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 23:24:40,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 23:24:40,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3905, Invalid=11347, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:24:40,679 INFO L87 Difference]: Start difference. First operand 310 states and 312 transitions. Second operand 124 states. [2018-09-30 23:24:46,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:46,377 INFO L93 Difference]: Finished difference Result 562 states and 566 transitions. [2018-09-30 23:24:46,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 23:24:46,377 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 307 [2018-09-30 23:24:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:46,378 INFO L225 Difference]: With dead ends: 562 [2018-09-30 23:24:46,378 INFO L226 Difference]: Without dead ends: 311 [2018-09-30 23:24:46,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5430 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=7809, Invalid=26231, Unknown=0, NotChecked=0, Total=34040 [2018-09-30 23:24:46,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-09-30 23:24:46,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-09-30 23:24:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-09-30 23:24:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 313 transitions. [2018-09-30 23:24:46,414 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 313 transitions. Word has length 307 [2018-09-30 23:24:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:46,414 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 313 transitions. [2018-09-30 23:24:46,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 23:24:46,414 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 313 transitions. [2018-09-30 23:24:46,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-09-30 23:24:46,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:46,416 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 61, 60, 60, 1, 1, 1, 1, 1] [2018-09-30 23:24:46,416 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:46,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:46,416 INFO L82 PathProgramCache]: Analyzing trace with hash -306186602, now seen corresponding path program 120 times [2018-09-30 23:24:46,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:46,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:46,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:46,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:46,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 2011 proven. 7200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:48,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:48,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:48,028 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:48,276 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 23:24:48,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:48,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 2011 proven. 7200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:48,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:48,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 23:24:48,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:24:48,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:24:48,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:24:48,396 INFO L87 Difference]: Start difference. First operand 311 states and 313 transitions. Second operand 64 states. [2018-09-30 23:24:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:48,903 INFO L93 Difference]: Finished difference Result 325 states and 328 transitions. [2018-09-30 23:24:48,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:24:48,904 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 308 [2018-09-30 23:24:48,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:48,904 INFO L225 Difference]: With dead ends: 325 [2018-09-30 23:24:48,904 INFO L226 Difference]: Without dead ends: 319 [2018-09-30 23:24:48,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:24:48,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-09-30 23:24:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 315. [2018-09-30 23:24:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-09-30 23:24:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 317 transitions. [2018-09-30 23:24:48,964 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 317 transitions. Word has length 308 [2018-09-30 23:24:48,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:48,965 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 317 transitions. [2018-09-30 23:24:48,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:24:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 317 transitions. [2018-09-30 23:24:48,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-09-30 23:24:48,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:48,966 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 61, 1, 1, 1, 1, 1] [2018-09-30 23:24:48,966 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:48,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1142706420, now seen corresponding path program 121 times [2018-09-30 23:24:48,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:48,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:48,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:48,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:48,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9455 backedges. 7564 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:53,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:53,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:53,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:53,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9455 backedges. 7564 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:53,545 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:53,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 23:24:53,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 23:24:53,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 23:24:53,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:24:53,547 INFO L87 Difference]: Start difference. First operand 315 states and 317 transitions. Second operand 126 states. [2018-09-30 23:24:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:59,572 INFO L93 Difference]: Finished difference Result 571 states and 575 transitions. [2018-09-30 23:24:59,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 23:24:59,573 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 312 [2018-09-30 23:24:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:59,573 INFO L225 Difference]: With dead ends: 571 [2018-09-30 23:24:59,573 INFO L226 Difference]: Without dead ends: 316 [2018-09-30 23:24:59,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5612 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=8061, Invalid=27095, Unknown=0, NotChecked=0, Total=35156 [2018-09-30 23:24:59,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2018-09-30 23:24:59,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2018-09-30 23:24:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-09-30 23:24:59,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 318 transitions. [2018-09-30 23:24:59,612 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 318 transitions. Word has length 312 [2018-09-30 23:24:59,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:59,612 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 318 transitions. [2018-09-30 23:24:59,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 23:24:59,612 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 318 transitions. [2018-09-30 23:24:59,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-09-30 23:24:59,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:59,613 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 61, 61, 1, 1, 1, 1, 1] [2018-09-30 23:24:59,613 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:59,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:59,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1622459515, now seen corresponding path program 122 times [2018-09-30 23:24:59,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:59,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:59,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:59,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:59,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 2075 proven. 7442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:01,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:01,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:01,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:25:01,470 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:25:01,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:01,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 2075 proven. 7442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:01,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:01,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 23:25:01,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:25:01,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:25:01,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:25:01,575 INFO L87 Difference]: Start difference. First operand 316 states and 318 transitions. Second operand 65 states. [2018-09-30 23:25:02,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:02,036 INFO L93 Difference]: Finished difference Result 330 states and 333 transitions. [2018-09-30 23:25:02,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:25:02,036 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 313 [2018-09-30 23:25:02,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:02,037 INFO L225 Difference]: With dead ends: 330 [2018-09-30 23:25:02,037 INFO L226 Difference]: Without dead ends: 324 [2018-09-30 23:25:02,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:25:02,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2018-09-30 23:25:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 320. [2018-09-30 23:25:02,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-09-30 23:25:02,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 322 transitions. [2018-09-30 23:25:02,083 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 322 transitions. Word has length 313 [2018-09-30 23:25:02,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:02,083 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 322 transitions. [2018-09-30 23:25:02,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:25:02,084 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 322 transitions. [2018-09-30 23:25:02,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-09-30 23:25:02,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:02,085 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 62, 1, 1, 1, 1, 1] [2018-09-30 23:25:02,085 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:02,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:02,086 INFO L82 PathProgramCache]: Analyzing trace with hash 2069161083, now seen corresponding path program 123 times [2018-09-30 23:25:02,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:02,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:02,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:02,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:02,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9765 backedges. 7812 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:06,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:06,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:06,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:25:07,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-30 23:25:07,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:07,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9765 backedges. 7812 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:07,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:07,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 23:25:07,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 23:25:07,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 23:25:07,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4159, Invalid=12097, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:25:07,379 INFO L87 Difference]: Start difference. First operand 320 states and 322 transitions. Second operand 128 states. [2018-09-30 23:25:13,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:13,391 INFO L93 Difference]: Finished difference Result 580 states and 584 transitions. [2018-09-30 23:25:13,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 23:25:13,391 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 317 [2018-09-30 23:25:13,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:13,392 INFO L225 Difference]: With dead ends: 580 [2018-09-30 23:25:13,392 INFO L226 Difference]: Without dead ends: 321 [2018-09-30 23:25:13,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5797 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=8317, Invalid=27973, Unknown=0, NotChecked=0, Total=36290 [2018-09-30 23:25:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-09-30 23:25:13,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2018-09-30 23:25:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2018-09-30 23:25:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 323 transitions. [2018-09-30 23:25:13,431 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 323 transitions. Word has length 317 [2018-09-30 23:25:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:13,432 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 323 transitions. [2018-09-30 23:25:13,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 23:25:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 323 transitions. [2018-09-30 23:25:13,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-30 23:25:13,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:13,433 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 62, 62, 1, 1, 1, 1, 1] [2018-09-30 23:25:13,433 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:13,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:13,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1430207394, now seen corresponding path program 124 times [2018-09-30 23:25:13,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:13,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:13,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:13,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:13,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 2140 proven. 7688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:15,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:15,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:15,471 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:15,628 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:15,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:15,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 2140 proven. 7688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:15,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:15,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 23:25:15,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:25:15,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:25:15,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:25:15,741 INFO L87 Difference]: Start difference. First operand 321 states and 323 transitions. Second operand 66 states. [2018-09-30 23:25:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:16,228 INFO L93 Difference]: Finished difference Result 335 states and 338 transitions. [2018-09-30 23:25:16,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:25:16,228 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 318 [2018-09-30 23:25:16,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:16,229 INFO L225 Difference]: With dead ends: 335 [2018-09-30 23:25:16,229 INFO L226 Difference]: Without dead ends: 329 [2018-09-30 23:25:16,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:25:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2018-09-30 23:25:16,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 325. [2018-09-30 23:25:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-09-30 23:25:16,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 327 transitions. [2018-09-30 23:25:16,269 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 327 transitions. Word has length 318 [2018-09-30 23:25:16,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:16,270 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 327 transitions. [2018-09-30 23:25:16,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:25:16,270 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 327 transitions. [2018-09-30 23:25:16,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-09-30 23:25:16,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:16,271 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 63, 1, 1, 1, 1, 1] [2018-09-30 23:25:16,271 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:16,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:16,271 INFO L82 PathProgramCache]: Analyzing trace with hash 417435160, now seen corresponding path program 125 times [2018-09-30 23:25:16,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:16,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:16,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:16,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:16,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10080 backedges. 8064 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:21,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:21,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:21,101 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:25:21,350 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-30 23:25:21,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:21,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10080 backedges. 8064 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:21,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:21,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 23:25:21,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 23:25:21,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 23:25:21,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4289, Invalid=12481, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:25:21,477 INFO L87 Difference]: Start difference. First operand 325 states and 327 transitions. Second operand 130 states. [2018-09-30 23:25:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:26,595 INFO L93 Difference]: Finished difference Result 589 states and 593 transitions. [2018-09-30 23:25:26,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 23:25:26,595 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 322 [2018-09-30 23:25:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:26,596 INFO L225 Difference]: With dead ends: 589 [2018-09-30 23:25:26,596 INFO L226 Difference]: Without dead ends: 326 [2018-09-30 23:25:26,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=8577, Invalid=28865, Unknown=0, NotChecked=0, Total=37442 [2018-09-30 23:25:26,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2018-09-30 23:25:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2018-09-30 23:25:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2018-09-30 23:25:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 328 transitions. [2018-09-30 23:25:26,638 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 328 transitions. Word has length 322 [2018-09-30 23:25:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:26,638 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 328 transitions. [2018-09-30 23:25:26,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 23:25:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 328 transitions. [2018-09-30 23:25:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-09-30 23:25:26,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:26,639 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 64, 63, 63, 1, 1, 1, 1, 1] [2018-09-30 23:25:26,639 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:26,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:26,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1721591983, now seen corresponding path program 126 times [2018-09-30 23:25:26,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:26,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:26,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:26,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:26,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 2206 proven. 7938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:28,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:28,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:28,444 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:25:28,718 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-09-30 23:25:28,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:28,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10144 backedges. 2206 proven. 7938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:28,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:28,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 23:25:28,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:25:28,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:25:28,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:25:28,830 INFO L87 Difference]: Start difference. First operand 326 states and 328 transitions. Second operand 67 states. [2018-09-30 23:25:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:29,338 INFO L93 Difference]: Finished difference Result 340 states and 343 transitions. [2018-09-30 23:25:29,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:25:29,350 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 323 [2018-09-30 23:25:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:29,351 INFO L225 Difference]: With dead ends: 340 [2018-09-30 23:25:29,351 INFO L226 Difference]: Without dead ends: 334 [2018-09-30 23:25:29,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:25:29,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2018-09-30 23:25:29,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2018-09-30 23:25:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2018-09-30 23:25:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 332 transitions. [2018-09-30 23:25:29,392 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 332 transitions. Word has length 323 [2018-09-30 23:25:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:29,392 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 332 transitions. [2018-09-30 23:25:29,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:25:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 332 transitions. [2018-09-30 23:25:29,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-09-30 23:25:29,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:29,393 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 64, 1, 1, 1, 1, 1] [2018-09-30 23:25:29,393 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:29,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:29,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1618904505, now seen corresponding path program 127 times [2018-09-30 23:25:29,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:29,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:29,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:29,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:29,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10400 backedges. 8320 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:34,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:34,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:34,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:34,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10400 backedges. 8320 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:34,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:34,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 23:25:34,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 23:25:34,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 23:25:34,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4421, Invalid=12871, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:25:34,430 INFO L87 Difference]: Start difference. First operand 330 states and 332 transitions. Second operand 132 states. [2018-09-30 23:25:40,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:40,974 INFO L93 Difference]: Finished difference Result 598 states and 602 transitions. [2018-09-30 23:25:40,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 23:25:40,974 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 327 [2018-09-30 23:25:40,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:40,975 INFO L225 Difference]: With dead ends: 598 [2018-09-30 23:25:40,975 INFO L226 Difference]: Without dead ends: 331 [2018-09-30 23:25:40,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6176 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=8841, Invalid=29771, Unknown=0, NotChecked=0, Total=38612 [2018-09-30 23:25:40,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-09-30 23:25:41,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-09-30 23:25:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-09-30 23:25:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 333 transitions. [2018-09-30 23:25:41,017 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 333 transitions. Word has length 327 [2018-09-30 23:25:41,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:41,018 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 333 transitions. [2018-09-30 23:25:41,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 23:25:41,018 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 333 transitions. [2018-09-30 23:25:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-09-30 23:25:41,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:41,019 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 64, 64, 1, 1, 1, 1, 1] [2018-09-30 23:25:41,019 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:41,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:41,019 INFO L82 PathProgramCache]: Analyzing trace with hash 75648174, now seen corresponding path program 128 times [2018-09-30 23:25:41,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:41,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:41,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:41,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:41,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 2273 proven. 8192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:42,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:42,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:42,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:25:43,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:25:43,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:43,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10465 backedges. 2273 proven. 8192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:43,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:43,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 23:25:43,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:25:43,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:25:43,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:25:43,137 INFO L87 Difference]: Start difference. First operand 331 states and 333 transitions. Second operand 68 states. [2018-09-30 23:25:43,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:43,554 INFO L93 Difference]: Finished difference Result 345 states and 348 transitions. [2018-09-30 23:25:43,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:25:43,555 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 328 [2018-09-30 23:25:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:43,555 INFO L225 Difference]: With dead ends: 345 [2018-09-30 23:25:43,555 INFO L226 Difference]: Without dead ends: 339 [2018-09-30 23:25:43,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:25:43,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-30 23:25:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 335. [2018-09-30 23:25:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-09-30 23:25:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 337 transitions. [2018-09-30 23:25:43,595 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 337 transitions. Word has length 328 [2018-09-30 23:25:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:43,595 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 337 transitions. [2018-09-30 23:25:43,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:25:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 337 transitions. [2018-09-30 23:25:43,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-09-30 23:25:43,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:43,596 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 65, 1, 1, 1, 1, 1] [2018-09-30 23:25:43,597 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:43,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:43,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1591556388, now seen corresponding path program 129 times [2018-09-30 23:25:43,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:43,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:43,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:43,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:43,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10725 backedges. 8580 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:48,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:48,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:48,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:25:49,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-30 23:25:49,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:49,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10725 backedges. 8580 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:49,138 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:49,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 23:25:49,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 23:25:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 23:25:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4555, Invalid=13267, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:25:49,140 INFO L87 Difference]: Start difference. First operand 335 states and 337 transitions. Second operand 134 states. [2018-09-30 23:25:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:56,203 INFO L93 Difference]: Finished difference Result 607 states and 611 transitions. [2018-09-30 23:25:56,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 23:25:56,203 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 332 [2018-09-30 23:25:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:56,204 INFO L225 Difference]: With dead ends: 607 [2018-09-30 23:25:56,204 INFO L226 Difference]: Without dead ends: 336 [2018-09-30 23:25:56,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6370 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=9109, Invalid=30691, Unknown=0, NotChecked=0, Total=39800 [2018-09-30 23:25:56,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2018-09-30 23:25:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2018-09-30 23:25:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2018-09-30 23:25:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 338 transitions. [2018-09-30 23:25:56,248 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 338 transitions. Word has length 332 [2018-09-30 23:25:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:56,248 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 338 transitions. [2018-09-30 23:25:56,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 23:25:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 338 transitions. [2018-09-30 23:25:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-09-30 23:25:56,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:56,250 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 65, 65, 1, 1, 1, 1, 1] [2018-09-30 23:25:56,250 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:56,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:56,250 INFO L82 PathProgramCache]: Analyzing trace with hash 592629533, now seen corresponding path program 130 times [2018-09-30 23:25:56,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:56,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:56,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:56,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:56,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 2341 proven. 8450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:58,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:58,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:58,160 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:58,329 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:58,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:58,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 2341 proven. 8450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:58,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:58,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 23:25:58,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:25:58,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:25:58,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:25:58,454 INFO L87 Difference]: Start difference. First operand 336 states and 338 transitions. Second operand 69 states. [2018-09-30 23:25:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:58,980 INFO L93 Difference]: Finished difference Result 350 states and 353 transitions. [2018-09-30 23:25:58,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:25:58,980 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 333 [2018-09-30 23:25:58,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:58,981 INFO L225 Difference]: With dead ends: 350 [2018-09-30 23:25:58,981 INFO L226 Difference]: Without dead ends: 344 [2018-09-30 23:25:58,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:25:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2018-09-30 23:25:59,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 340. [2018-09-30 23:25:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-09-30 23:25:59,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 342 transitions. [2018-09-30 23:25:59,023 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 342 transitions. Word has length 333 [2018-09-30 23:25:59,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:59,023 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 342 transitions. [2018-09-30 23:25:59,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:25:59,023 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 342 transitions. [2018-09-30 23:25:59,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-09-30 23:25:59,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:59,024 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 66, 1, 1, 1, 1, 1] [2018-09-30 23:25:59,025 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:59,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:59,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1011291117, now seen corresponding path program 131 times [2018-09-30 23:25:59,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:59,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:59,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:59,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:59,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11055 backedges. 8844 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:04,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:04,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:04,376 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:26:04,645 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-30 23:26:04,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:04,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11055 backedges. 8844 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:04,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:04,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 23:26:04,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 23:26:04,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 23:26:04,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4691, Invalid=13669, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:26:04,759 INFO L87 Difference]: Start difference. First operand 340 states and 342 transitions. Second operand 136 states. [2018-09-30 23:26:11,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:11,918 INFO L93 Difference]: Finished difference Result 616 states and 620 transitions. [2018-09-30 23:26:11,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 23:26:11,919 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 337 [2018-09-30 23:26:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:11,920 INFO L225 Difference]: With dead ends: 616 [2018-09-30 23:26:11,920 INFO L226 Difference]: Without dead ends: 341 [2018-09-30 23:26:11,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6567 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=9381, Invalid=31625, Unknown=0, NotChecked=0, Total=41006 [2018-09-30 23:26:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2018-09-30 23:26:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2018-09-30 23:26:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-09-30 23:26:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 343 transitions. [2018-09-30 23:26:11,983 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 343 transitions. Word has length 337 [2018-09-30 23:26:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:11,983 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 343 transitions. [2018-09-30 23:26:11,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 23:26:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 343 transitions. [2018-09-30 23:26:12,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-30 23:26:12,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:12,005 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 67, 66, 66, 1, 1, 1, 1, 1] [2018-09-30 23:26:12,005 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:12,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:12,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1801398714, now seen corresponding path program 132 times [2018-09-30 23:26:12,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:12,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:12,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:12,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:12,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 2410 proven. 8712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:14,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:14,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:14,009 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:26:14,293 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 23:26:14,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:14,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11122 backedges. 2410 proven. 8712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:14,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:14,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 23:26:14,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:26:14,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:26:14,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:26:14,410 INFO L87 Difference]: Start difference. First operand 341 states and 343 transitions. Second operand 70 states. [2018-09-30 23:26:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:14,945 INFO L93 Difference]: Finished difference Result 355 states and 358 transitions. [2018-09-30 23:26:14,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:26:14,945 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 338 [2018-09-30 23:26:14,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:14,946 INFO L225 Difference]: With dead ends: 355 [2018-09-30 23:26:14,946 INFO L226 Difference]: Without dead ends: 349 [2018-09-30 23:26:14,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:26:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2018-09-30 23:26:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2018-09-30 23:26:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2018-09-30 23:26:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 347 transitions. [2018-09-30 23:26:14,987 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 347 transitions. Word has length 338 [2018-09-30 23:26:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:14,987 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 347 transitions. [2018-09-30 23:26:14,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:26:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 347 transitions. [2018-09-30 23:26:14,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-09-30 23:26:14,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:14,989 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 67, 1, 1, 1, 1, 1] [2018-09-30 23:26:14,989 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:14,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:14,989 INFO L82 PathProgramCache]: Analyzing trace with hash 581742640, now seen corresponding path program 133 times [2018-09-30 23:26:14,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:14,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:14,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:14,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:14,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11390 backedges. 9112 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:20,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:20,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:20,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:20,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11390 backedges. 9112 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:20,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:20,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 23:26:20,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 23:26:20,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 23:26:20,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4829, Invalid=14077, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:26:20,571 INFO L87 Difference]: Start difference. First operand 345 states and 347 transitions. Second operand 138 states. [2018-09-30 23:26:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:27,586 INFO L93 Difference]: Finished difference Result 625 states and 629 transitions. [2018-09-30 23:26:27,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 23:26:27,586 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 342 [2018-09-30 23:26:27,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:27,586 INFO L225 Difference]: With dead ends: 625 [2018-09-30 23:26:27,586 INFO L226 Difference]: Without dead ends: 346 [2018-09-30 23:26:27,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6767 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=9657, Invalid=32573, Unknown=0, NotChecked=0, Total=42230 [2018-09-30 23:26:27,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-09-30 23:26:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2018-09-30 23:26:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2018-09-30 23:26:27,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 348 transitions. [2018-09-30 23:26:27,631 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 348 transitions. Word has length 342 [2018-09-30 23:26:27,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:27,631 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 348 transitions. [2018-09-30 23:26:27,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 23:26:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 348 transitions. [2018-09-30 23:26:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2018-09-30 23:26:27,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:27,632 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 67, 67, 1, 1, 1, 1, 1] [2018-09-30 23:26:27,632 INFO L423 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:27,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:27,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2023890199, now seen corresponding path program 134 times [2018-09-30 23:26:27,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:27,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:27,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:27,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:27,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 2480 proven. 8978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:29,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:29,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:29,606 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:26:29,765 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:26:29,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:29,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11458 backedges. 2480 proven. 8978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:29,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:29,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 23:26:29,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:26:29,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:26:29,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:26:29,904 INFO L87 Difference]: Start difference. First operand 346 states and 348 transitions. Second operand 71 states. [2018-09-30 23:26:30,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:30,409 INFO L93 Difference]: Finished difference Result 360 states and 363 transitions. [2018-09-30 23:26:30,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:26:30,410 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 343 [2018-09-30 23:26:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:30,410 INFO L225 Difference]: With dead ends: 360 [2018-09-30 23:26:30,410 INFO L226 Difference]: Without dead ends: 354 [2018-09-30 23:26:30,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:26:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2018-09-30 23:26:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 350. [2018-09-30 23:26:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2018-09-30 23:26:30,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 352 transitions. [2018-09-30 23:26:30,455 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 352 transitions. Word has length 343 [2018-09-30 23:26:30,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:30,455 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 352 transitions. [2018-09-30 23:26:30,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:26:30,455 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 352 transitions. [2018-09-30 23:26:30,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-09-30 23:26:30,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:30,456 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 68, 1, 1, 1, 1, 1] [2018-09-30 23:26:30,456 INFO L423 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:30,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:30,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1094531551, now seen corresponding path program 135 times [2018-09-30 23:26:30,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:30,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:30,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:30,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:30,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11730 backedges. 9384 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:36,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:36,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:36,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:26:36,614 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-09-30 23:26:36,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:36,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11730 backedges. 9384 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:36,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:36,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-30 23:26:36,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 23:26:36,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 23:26:36,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4969, Invalid=14491, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:26:36,745 INFO L87 Difference]: Start difference. First operand 350 states and 352 transitions. Second operand 140 states. [2018-09-30 23:26:41,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:41,762 INFO L93 Difference]: Finished difference Result 634 states and 638 transitions. [2018-09-30 23:26:41,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-30 23:26:41,762 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 347 [2018-09-30 23:26:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:41,763 INFO L225 Difference]: With dead ends: 634 [2018-09-30 23:26:41,763 INFO L226 Difference]: Without dead ends: 351 [2018-09-30 23:26:41,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6970 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=9937, Invalid=33535, Unknown=0, NotChecked=0, Total=43472 [2018-09-30 23:26:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-30 23:26:41,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-09-30 23:26:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-09-30 23:26:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 353 transitions. [2018-09-30 23:26:41,808 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 353 transitions. Word has length 347 [2018-09-30 23:26:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:41,809 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 353 transitions. [2018-09-30 23:26:41,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 23:26:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 353 transitions. [2018-09-30 23:26:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-09-30 23:26:41,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:41,810 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 68, 68, 1, 1, 1, 1, 1] [2018-09-30 23:26:41,810 INFO L423 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:41,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:41,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1322528058, now seen corresponding path program 136 times [2018-09-30 23:26:41,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:41,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:41,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:41,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:41,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 2551 proven. 9248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:43,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:43,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:43,815 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:26:43,990 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:26:43,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:44,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11799 backedges. 2551 proven. 9248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:44,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:44,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 23:26:44,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:26:44,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:26:44,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:26:44,120 INFO L87 Difference]: Start difference. First operand 351 states and 353 transitions. Second operand 72 states. [2018-09-30 23:26:44,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:44,644 INFO L93 Difference]: Finished difference Result 365 states and 368 transitions. [2018-09-30 23:26:44,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:26:44,645 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 348 [2018-09-30 23:26:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:44,646 INFO L225 Difference]: With dead ends: 365 [2018-09-30 23:26:44,646 INFO L226 Difference]: Without dead ends: 359 [2018-09-30 23:26:44,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:26:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-09-30 23:26:44,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 355. [2018-09-30 23:26:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-09-30 23:26:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 357 transitions. [2018-09-30 23:26:44,712 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 357 transitions. Word has length 348 [2018-09-30 23:26:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:44,713 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 357 transitions. [2018-09-30 23:26:44,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:26:44,713 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 357 transitions. [2018-09-30 23:26:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-09-30 23:26:44,714 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:44,714 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 69, 1, 1, 1, 1, 1] [2018-09-30 23:26:44,715 INFO L423 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:44,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:44,715 INFO L82 PathProgramCache]: Analyzing trace with hash -257559748, now seen corresponding path program 137 times [2018-09-30 23:26:44,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:44,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:44,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:44,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:44,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12075 backedges. 9660 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:50,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:50,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:50,544 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:26:50,827 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-30 23:26:50,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:50,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12075 backedges. 9660 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:50,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:50,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-09-30 23:26:50,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 23:26:50,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 23:26:50,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5111, Invalid=14911, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:26:50,957 INFO L87 Difference]: Start difference. First operand 355 states and 357 transitions. Second operand 142 states. [2018-09-30 23:26:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:57,253 INFO L93 Difference]: Finished difference Result 643 states and 647 transitions. [2018-09-30 23:26:57,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-30 23:26:57,253 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 352 [2018-09-30 23:26:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:57,254 INFO L225 Difference]: With dead ends: 643 [2018-09-30 23:26:57,254 INFO L226 Difference]: Without dead ends: 356 [2018-09-30 23:26:57,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7176 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=10221, Invalid=34511, Unknown=0, NotChecked=0, Total=44732 [2018-09-30 23:26:57,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-09-30 23:26:57,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2018-09-30 23:26:57,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-09-30 23:26:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 358 transitions. [2018-09-30 23:26:57,300 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 358 transitions. Word has length 352 [2018-09-30 23:26:57,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:57,301 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 358 transitions. [2018-09-30 23:26:57,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 23:26:57,301 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 358 transitions. [2018-09-30 23:26:57,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-09-30 23:26:57,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:57,302 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 70, 69, 69, 1, 1, 1, 1, 1] [2018-09-30 23:26:57,302 INFO L423 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:57,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:57,302 INFO L82 PathProgramCache]: Analyzing trace with hash 809882293, now seen corresponding path program 138 times [2018-09-30 23:26:57,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:57,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:57,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:57,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:57,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 2623 proven. 9522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:59,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:59,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:59,474 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:26:59,788 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-09-30 23:26:59,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:59,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12145 backedges. 2623 proven. 9522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:59,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:59,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 23:26:59,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:26:59,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:26:59,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:26:59,911 INFO L87 Difference]: Start difference. First operand 356 states and 358 transitions. Second operand 73 states. [2018-09-30 23:27:00,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:00,414 INFO L93 Difference]: Finished difference Result 370 states and 373 transitions. [2018-09-30 23:27:00,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:27:00,414 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 353 [2018-09-30 23:27:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:00,415 INFO L225 Difference]: With dead ends: 370 [2018-09-30 23:27:00,415 INFO L226 Difference]: Without dead ends: 364 [2018-09-30 23:27:00,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:27:00,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2018-09-30 23:27:00,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 360. [2018-09-30 23:27:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2018-09-30 23:27:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 362 transitions. [2018-09-30 23:27:00,462 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 362 transitions. Word has length 353 [2018-09-30 23:27:00,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:00,462 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 362 transitions. [2018-09-30 23:27:00,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:27:00,462 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 362 transitions. [2018-09-30 23:27:00,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-09-30 23:27:00,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:00,463 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 70, 1, 1, 1, 1, 1] [2018-09-30 23:27:00,463 INFO L423 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:00,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:00,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1372611499, now seen corresponding path program 139 times [2018-09-30 23:27:00,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:00,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:00,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:00,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:00,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12425 backedges. 9940 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:06,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:06,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:06,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:06,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12425 backedges. 9940 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:06,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:06,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-09-30 23:27:06,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 23:27:06,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 23:27:06,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=15337, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:27:06,825 INFO L87 Difference]: Start difference. First operand 360 states and 362 transitions. Second operand 144 states. [2018-09-30 23:27:12,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:12,903 INFO L93 Difference]: Finished difference Result 652 states and 656 transitions. [2018-09-30 23:27:12,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-30 23:27:12,903 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 357 [2018-09-30 23:27:12,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:12,904 INFO L225 Difference]: With dead ends: 652 [2018-09-30 23:27:12,904 INFO L226 Difference]: Without dead ends: 361 [2018-09-30 23:27:12,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7385 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=10509, Invalid=35501, Unknown=0, NotChecked=0, Total=46010 [2018-09-30 23:27:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2018-09-30 23:27:12,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2018-09-30 23:27:12,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-09-30 23:27:12,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 363 transitions. [2018-09-30 23:27:12,952 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 363 transitions. Word has length 357 [2018-09-30 23:27:12,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:12,952 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 363 transitions. [2018-09-30 23:27:12,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 23:27:12,952 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 363 transitions. [2018-09-30 23:27:12,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-09-30 23:27:12,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:12,954 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 70, 70, 1, 1, 1, 1, 1] [2018-09-30 23:27:12,954 INFO L423 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:12,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1421756370, now seen corresponding path program 140 times [2018-09-30 23:27:12,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:12,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:12,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:12,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:12,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12496 backedges. 2696 proven. 9800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:15,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:15,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:15,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:27:15,344 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:27:15,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:15,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12496 backedges. 2696 proven. 9800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:15,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:15,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 23:27:15,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:27:15,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:27:15,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:27:15,471 INFO L87 Difference]: Start difference. First operand 361 states and 363 transitions. Second operand 74 states. [2018-09-30 23:27:16,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:16,055 INFO L93 Difference]: Finished difference Result 375 states and 378 transitions. [2018-09-30 23:27:16,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:27:16,056 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 358 [2018-09-30 23:27:16,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:16,056 INFO L225 Difference]: With dead ends: 375 [2018-09-30 23:27:16,056 INFO L226 Difference]: Without dead ends: 369 [2018-09-30 23:27:16,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:27:16,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2018-09-30 23:27:16,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 365. [2018-09-30 23:27:16,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2018-09-30 23:27:16,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 367 transitions. [2018-09-30 23:27:16,127 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 367 transitions. Word has length 358 [2018-09-30 23:27:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:16,127 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 367 transitions. [2018-09-30 23:27:16,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:27:16,128 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 367 transitions. [2018-09-30 23:27:16,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-09-30 23:27:16,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:16,129 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 71, 1, 1, 1, 1, 1] [2018-09-30 23:27:16,129 INFO L423 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:16,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash -325123512, now seen corresponding path program 141 times [2018-09-30 23:27:16,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:16,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:16,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:16,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:16,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12780 backedges. 10224 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:22,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:22,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:22,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:27:22,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-09-30 23:27:22,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:22,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12780 backedges. 10224 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:22,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:22,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-09-30 23:27:22,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 23:27:22,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 23:27:22,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5401, Invalid=15769, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:27:22,840 INFO L87 Difference]: Start difference. First operand 365 states and 367 transitions. Second operand 146 states. [2018-09-30 23:27:28,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:28,985 INFO L93 Difference]: Finished difference Result 661 states and 665 transitions. [2018-09-30 23:27:28,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-30 23:27:28,986 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 362 [2018-09-30 23:27:28,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:28,986 INFO L225 Difference]: With dead ends: 661 [2018-09-30 23:27:28,986 INFO L226 Difference]: Without dead ends: 366 [2018-09-30 23:27:28,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7597 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=10801, Invalid=36505, Unknown=0, NotChecked=0, Total=47306 [2018-09-30 23:27:28,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2018-09-30 23:27:29,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 366. [2018-09-30 23:27:29,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2018-09-30 23:27:29,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 368 transitions. [2018-09-30 23:27:29,061 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 368 transitions. Word has length 362 [2018-09-30 23:27:29,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:29,061 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 368 transitions. [2018-09-30 23:27:29,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 23:27:29,062 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 368 transitions. [2018-09-30 23:27:29,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-09-30 23:27:29,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:29,064 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 72, 71, 71, 1, 1, 1, 1, 1] [2018-09-30 23:27:29,064 INFO L423 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:29,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:29,064 INFO L82 PathProgramCache]: Analyzing trace with hash 156016257, now seen corresponding path program 142 times [2018-09-30 23:27:29,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:29,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:29,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:29,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:29,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12852 backedges. 2770 proven. 10082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:31,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:31,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:31,359 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:27:31,542 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:27:31,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:31,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12852 backedges. 2770 proven. 10082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:31,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:31,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 23:27:31,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:27:31,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:27:31,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:27:31,680 INFO L87 Difference]: Start difference. First operand 366 states and 368 transitions. Second operand 75 states. [2018-09-30 23:27:32,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:32,232 INFO L93 Difference]: Finished difference Result 380 states and 383 transitions. [2018-09-30 23:27:32,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:27:32,232 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 363 [2018-09-30 23:27:32,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:32,232 INFO L225 Difference]: With dead ends: 380 [2018-09-30 23:27:32,233 INFO L226 Difference]: Without dead ends: 374 [2018-09-30 23:27:32,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:27:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2018-09-30 23:27:32,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 370. [2018-09-30 23:27:32,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2018-09-30 23:27:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 372 transitions. [2018-09-30 23:27:32,281 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 372 transitions. Word has length 363 [2018-09-30 23:27:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:32,281 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 372 transitions. [2018-09-30 23:27:32,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:27:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 372 transitions. [2018-09-30 23:27:32,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2018-09-30 23:27:32,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:32,283 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 72, 1, 1, 1, 1, 1] [2018-09-30 23:27:32,283 INFO L423 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:32,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:32,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1874094455, now seen corresponding path program 143 times [2018-09-30 23:27:32,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:32,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:32,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:32,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:32,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13140 backedges. 10512 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:38,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:38,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:38,499 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:27:38,802 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-30 23:27:38,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:38,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13140 backedges. 10512 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:38,955 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:38,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-09-30 23:27:38,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 23:27:38,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 23:27:38,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5549, Invalid=16207, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 23:27:38,956 INFO L87 Difference]: Start difference. First operand 370 states and 372 transitions. Second operand 148 states. [2018-09-30 23:27:44,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:44,674 INFO L93 Difference]: Finished difference Result 670 states and 674 transitions. [2018-09-30 23:27:44,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-09-30 23:27:44,674 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 367 [2018-09-30 23:27:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:44,675 INFO L225 Difference]: With dead ends: 670 [2018-09-30 23:27:44,675 INFO L226 Difference]: Without dead ends: 371 [2018-09-30 23:27:44,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=11097, Invalid=37523, Unknown=0, NotChecked=0, Total=48620 [2018-09-30 23:27:44,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2018-09-30 23:27:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2018-09-30 23:27:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2018-09-30 23:27:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 373 transitions. [2018-09-30 23:27:44,725 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 373 transitions. Word has length 367 [2018-09-30 23:27:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:44,725 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 373 transitions. [2018-09-30 23:27:44,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 23:27:44,725 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 373 transitions. [2018-09-30 23:27:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-09-30 23:27:44,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:44,726 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 73, 72, 72, 1, 1, 1, 1, 1] [2018-09-30 23:27:44,727 INFO L423 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:44,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:44,727 INFO L82 PathProgramCache]: Analyzing trace with hash -865302306, now seen corresponding path program 144 times [2018-09-30 23:27:44,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:44,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:44,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:44,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:44,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 2845 proven. 10368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:46,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:46,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:47,005 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:27:47,331 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 23:27:47,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:47,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13213 backedges. 2845 proven. 10368 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:47,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:47,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 23:27:47,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:27:47,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:27:47,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:27:47,468 INFO L87 Difference]: Start difference. First operand 371 states and 373 transitions. Second operand 76 states. [2018-09-30 23:27:48,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:48,163 INFO L93 Difference]: Finished difference Result 385 states and 388 transitions. [2018-09-30 23:27:48,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:27:48,163 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 368 [2018-09-30 23:27:48,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:48,164 INFO L225 Difference]: With dead ends: 385 [2018-09-30 23:27:48,164 INFO L226 Difference]: Without dead ends: 379 [2018-09-30 23:27:48,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:27:48,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2018-09-30 23:27:48,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 375. [2018-09-30 23:27:48,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2018-09-30 23:27:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 377 transitions. [2018-09-30 23:27:48,208 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 377 transitions. Word has length 368 [2018-09-30 23:27:48,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:48,209 INFO L480 AbstractCegarLoop]: Abstraction has 375 states and 377 transitions. [2018-09-30 23:27:48,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:27:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 377 transitions. [2018-09-30 23:27:48,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-09-30 23:27:48,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:48,210 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 73, 1, 1, 1, 1, 1] [2018-09-30 23:27:48,210 INFO L423 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:48,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:48,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1911414100, now seen corresponding path program 145 times [2018-09-30 23:27:48,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:48,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:48,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:48,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:48,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13505 backedges. 10804 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:54,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:54,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:54,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:54,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13505 backedges. 10804 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:54,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:54,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-09-30 23:27:54,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 23:27:54,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 23:27:54,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5699, Invalid=16651, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:27:54,849 INFO L87 Difference]: Start difference. First operand 375 states and 377 transitions. Second operand 150 states. [2018-09-30 23:28:01,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:01,039 INFO L93 Difference]: Finished difference Result 679 states and 683 transitions. [2018-09-30 23:28:01,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-09-30 23:28:01,039 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 372 [2018-09-30 23:28:01,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:01,040 INFO L225 Difference]: With dead ends: 679 [2018-09-30 23:28:01,040 INFO L226 Difference]: Without dead ends: 376 [2018-09-30 23:28:01,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8030 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=11397, Invalid=38555, Unknown=0, NotChecked=0, Total=49952 [2018-09-30 23:28:01,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2018-09-30 23:28:01,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2018-09-30 23:28:01,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-09-30 23:28:01,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 378 transitions. [2018-09-30 23:28:01,114 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 378 transitions. Word has length 372 [2018-09-30 23:28:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:01,114 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 378 transitions. [2018-09-30 23:28:01,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 23:28:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 378 transitions. [2018-09-30 23:28:01,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-09-30 23:28:01,116 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:01,116 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 74, 73, 73, 1, 1, 1, 1, 1] [2018-09-30 23:28:01,116 INFO L423 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:01,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:01,117 INFO L82 PathProgramCache]: Analyzing trace with hash -566999475, now seen corresponding path program 146 times [2018-09-30 23:28:01,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:01,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:01,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:01,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:01,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13579 backedges. 2921 proven. 10658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:03,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:03,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:03,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:28:03,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:28:03,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:03,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13579 backedges. 2921 proven. 10658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:04,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:04,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 23:28:04,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:28:04,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:28:04,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:28:04,194 INFO L87 Difference]: Start difference. First operand 376 states and 378 transitions. Second operand 77 states. [2018-09-30 23:28:04,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:04,819 INFO L93 Difference]: Finished difference Result 390 states and 393 transitions. [2018-09-30 23:28:04,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:28:04,819 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 373 [2018-09-30 23:28:04,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:04,820 INFO L225 Difference]: With dead ends: 390 [2018-09-30 23:28:04,820 INFO L226 Difference]: Without dead ends: 384 [2018-09-30 23:28:04,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:28:04,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2018-09-30 23:28:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 380. [2018-09-30 23:28:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-09-30 23:28:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 382 transitions. [2018-09-30 23:28:04,871 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 382 transitions. Word has length 373 [2018-09-30 23:28:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:04,872 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 382 transitions. [2018-09-30 23:28:04,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:28:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 382 transitions. [2018-09-30 23:28:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-09-30 23:28:04,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:04,873 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 74, 1, 1, 1, 1, 1] [2018-09-30 23:28:04,873 INFO L423 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:04,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:04,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1247065277, now seen corresponding path program 147 times [2018-09-30 23:28:04,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:04,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:04,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:04,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:04,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13875 backedges. 11100 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:11,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:11,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:11,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:28:11,743 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-09-30 23:28:11,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:11,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13875 backedges. 11100 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:11,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:11,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 151 [2018-09-30 23:28:11,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 23:28:11,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 23:28:11,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5851, Invalid=17101, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:28:11,898 INFO L87 Difference]: Start difference. First operand 380 states and 382 transitions. Second operand 152 states. [2018-09-30 23:28:18,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:18,856 INFO L93 Difference]: Finished difference Result 688 states and 692 transitions. [2018-09-30 23:28:18,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-09-30 23:28:18,857 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 377 [2018-09-30 23:28:18,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:18,857 INFO L225 Difference]: With dead ends: 688 [2018-09-30 23:28:18,857 INFO L226 Difference]: Without dead ends: 381 [2018-09-30 23:28:18,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8251 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=11701, Invalid=39601, Unknown=0, NotChecked=0, Total=51302 [2018-09-30 23:28:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2018-09-30 23:28:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2018-09-30 23:28:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2018-09-30 23:28:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 383 transitions. [2018-09-30 23:28:18,932 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 383 transitions. Word has length 377 [2018-09-30 23:28:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:18,932 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 383 transitions. [2018-09-30 23:28:18,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 23:28:18,933 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 383 transitions. [2018-09-30 23:28:18,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-09-30 23:28:18,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:18,934 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 75, 74, 74, 1, 1, 1, 1, 1] [2018-09-30 23:28:18,935 INFO L423 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:18,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:18,935 INFO L82 PathProgramCache]: Analyzing trace with hash 638359018, now seen corresponding path program 148 times [2018-09-30 23:28:18,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:18,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:18,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:18,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:18,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13950 backedges. 2998 proven. 10952 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:21,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:21,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:21,349 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:28:21,540 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:28:21,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:21,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13950 backedges. 2998 proven. 10952 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:21,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:21,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 23:28:21,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:28:21,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:28:21,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:28:21,682 INFO L87 Difference]: Start difference. First operand 381 states and 383 transitions. Second operand 78 states. [2018-09-30 23:28:22,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:22,418 INFO L93 Difference]: Finished difference Result 395 states and 398 transitions. [2018-09-30 23:28:22,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:28:22,418 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 378 [2018-09-30 23:28:22,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:22,419 INFO L225 Difference]: With dead ends: 395 [2018-09-30 23:28:22,419 INFO L226 Difference]: Without dead ends: 389 [2018-09-30 23:28:22,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:28:22,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2018-09-30 23:28:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 385. [2018-09-30 23:28:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2018-09-30 23:28:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 387 transitions. [2018-09-30 23:28:22,465 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 387 transitions. Word has length 378 [2018-09-30 23:28:22,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:22,465 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 387 transitions. [2018-09-30 23:28:22,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:28:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 387 transitions. [2018-09-30 23:28:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-09-30 23:28:22,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:22,467 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 75, 1, 1, 1, 1, 1] [2018-09-30 23:28:22,467 INFO L423 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:22,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:22,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1284996000, now seen corresponding path program 149 times [2018-09-30 23:28:22,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:22,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:22,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:22,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:22,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14250 backedges. 11400 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:29,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:29,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:29,372 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:28:29,696 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2018-09-30 23:28:29,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:29,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 14250 backedges. 11400 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:29,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:29,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153] total 153 [2018-09-30 23:28:29,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 23:28:29,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 23:28:29,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6005, Invalid=17557, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:28:29,861 INFO L87 Difference]: Start difference. First operand 385 states and 387 transitions. Second operand 154 states. [2018-09-30 23:28:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:36,740 INFO L93 Difference]: Finished difference Result 697 states and 701 transitions. [2018-09-30 23:28:36,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-09-30 23:28:36,740 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 382 [2018-09-30 23:28:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:36,741 INFO L225 Difference]: With dead ends: 697 [2018-09-30 23:28:36,741 INFO L226 Difference]: Without dead ends: 386 [2018-09-30 23:28:36,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8475 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=12009, Invalid=40661, Unknown=0, NotChecked=0, Total=52670 [2018-09-30 23:28:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-09-30 23:28:36,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2018-09-30 23:28:36,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2018-09-30 23:28:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 388 transitions. [2018-09-30 23:28:36,823 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 388 transitions. Word has length 382 [2018-09-30 23:28:36,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:36,824 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 388 transitions. [2018-09-30 23:28:36,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 23:28:36,824 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 388 transitions. [2018-09-30 23:28:36,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2018-09-30 23:28:36,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:36,825 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 76, 75, 75, 1, 1, 1, 1, 1] [2018-09-30 23:28:36,825 INFO L423 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:36,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:36,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1153512935, now seen corresponding path program 150 times [2018-09-30 23:28:36,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:36,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:36,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:36,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:36,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 14326 backedges. 3076 proven. 11250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:39,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:39,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:39,568 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:28:39,909 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2018-09-30 23:28:39,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:39,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14326 backedges. 3076 proven. 11250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:40,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:40,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 23:28:40,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:28:40,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:28:40,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:28:40,050 INFO L87 Difference]: Start difference. First operand 386 states and 388 transitions. Second operand 79 states. [2018-09-30 23:28:40,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:40,610 INFO L93 Difference]: Finished difference Result 400 states and 403 transitions. [2018-09-30 23:28:40,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:28:40,610 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 383 [2018-09-30 23:28:40,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:40,611 INFO L225 Difference]: With dead ends: 400 [2018-09-30 23:28:40,611 INFO L226 Difference]: Without dead ends: 394 [2018-09-30 23:28:40,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:28:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2018-09-30 23:28:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 390. [2018-09-30 23:28:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2018-09-30 23:28:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 392 transitions. [2018-09-30 23:28:40,665 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 392 transitions. Word has length 383 [2018-09-30 23:28:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:40,665 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 392 transitions. [2018-09-30 23:28:40,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:28:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 392 transitions. [2018-09-30 23:28:40,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-09-30 23:28:40,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:40,666 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 76, 1, 1, 1, 1, 1] [2018-09-30 23:28:40,666 INFO L423 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:40,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:40,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1056377103, now seen corresponding path program 151 times [2018-09-30 23:28:40,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:40,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:40,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:40,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:40,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14630 backedges. 11704 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:47,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:47,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:47,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:47,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14630 backedges. 11704 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:47,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:47,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155] total 155 [2018-09-30 23:28:47,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 23:28:47,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 23:28:47,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6161, Invalid=18019, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:28:47,756 INFO L87 Difference]: Start difference. First operand 390 states and 392 transitions. Second operand 156 states. [2018-09-30 23:28:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:55,127 INFO L93 Difference]: Finished difference Result 706 states and 710 transitions. [2018-09-30 23:28:55,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-09-30 23:28:55,127 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 387 [2018-09-30 23:28:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:55,127 INFO L225 Difference]: With dead ends: 706 [2018-09-30 23:28:55,128 INFO L226 Difference]: Without dead ends: 391 [2018-09-30 23:28:55,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8702 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=12321, Invalid=41735, Unknown=0, NotChecked=0, Total=54056 [2018-09-30 23:28:55,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2018-09-30 23:28:55,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2018-09-30 23:28:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2018-09-30 23:28:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 393 transitions. [2018-09-30 23:28:55,182 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 393 transitions. Word has length 387 [2018-09-30 23:28:55,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:55,183 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 393 transitions. [2018-09-30 23:28:55,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 23:28:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 393 transitions. [2018-09-30 23:28:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2018-09-30 23:28:55,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:55,184 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 77, 76, 76, 1, 1, 1, 1, 1] [2018-09-30 23:28:55,184 INFO L423 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:55,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:55,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1493930250, now seen corresponding path program 152 times [2018-09-30 23:28:55,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:55,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:55,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:55,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:55,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14707 backedges. 3155 proven. 11552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:57,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:57,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:57,739 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:28:57,921 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:28:57,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:57,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 14707 backedges. 3155 proven. 11552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:58,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:58,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 23:28:58,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:28:58,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:28:58,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:28:58,063 INFO L87 Difference]: Start difference. First operand 391 states and 393 transitions. Second operand 80 states. [2018-09-30 23:28:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:58,827 INFO L93 Difference]: Finished difference Result 405 states and 408 transitions. [2018-09-30 23:28:58,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:28:58,827 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 388 [2018-09-30 23:28:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:58,828 INFO L225 Difference]: With dead ends: 405 [2018-09-30 23:28:58,828 INFO L226 Difference]: Without dead ends: 399 [2018-09-30 23:28:58,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:28:58,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-09-30 23:28:58,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 395. [2018-09-30 23:28:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2018-09-30 23:28:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 397 transitions. [2018-09-30 23:28:58,883 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 397 transitions. Word has length 388 [2018-09-30 23:28:58,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:58,883 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 397 transitions. [2018-09-30 23:28:58,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:28:58,883 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 397 transitions. [2018-09-30 23:28:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2018-09-30 23:28:58,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:58,884 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 77, 1, 1, 1, 1, 1] [2018-09-30 23:28:58,884 INFO L423 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:58,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:58,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1533343596, now seen corresponding path program 153 times [2018-09-30 23:28:58,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:58,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:58,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:58,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:58,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15015 backedges. 12012 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:06,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:06,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:06,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:29:06,674 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2018-09-30 23:29:06,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:06,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 15015 backedges. 12012 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:06,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:06,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 157] total 157 [2018-09-30 23:29:06,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 23:29:06,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 23:29:06,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6319, Invalid=18487, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:29:06,822 INFO L87 Difference]: Start difference. First operand 395 states and 397 transitions. Second operand 158 states. [2018-09-30 23:29:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:14,438 INFO L93 Difference]: Finished difference Result 715 states and 719 transitions. [2018-09-30 23:29:14,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-09-30 23:29:14,438 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 392 [2018-09-30 23:29:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:14,438 INFO L225 Difference]: With dead ends: 715 [2018-09-30 23:29:14,439 INFO L226 Difference]: Without dead ends: 396 [2018-09-30 23:29:14,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8932 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=12637, Invalid=42823, Unknown=0, NotChecked=0, Total=55460 [2018-09-30 23:29:14,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2018-09-30 23:29:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2018-09-30 23:29:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-09-30 23:29:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 398 transitions. [2018-09-30 23:29:14,497 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 398 transitions. Word has length 392 [2018-09-30 23:29:14,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:14,497 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 398 transitions. [2018-09-30 23:29:14,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 23:29:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 398 transitions. [2018-09-30 23:29:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-09-30 23:29:14,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:14,498 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 78, 77, 77, 1, 1, 1, 1, 1] [2018-09-30 23:29:14,498 INFO L423 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:14,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:14,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1294871013, now seen corresponding path program 154 times [2018-09-30 23:29:14,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:14,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:14,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:14,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:14,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15093 backedges. 3235 proven. 11858 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:17,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:17,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:17,248 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:29:17,449 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:29:17,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:17,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15093 backedges. 3235 proven. 11858 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:17,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:17,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 23:29:17,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:29:17,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:29:17,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:29:17,603 INFO L87 Difference]: Start difference. First operand 396 states and 398 transitions. Second operand 81 states. [2018-09-30 23:29:18,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:18,269 INFO L93 Difference]: Finished difference Result 410 states and 413 transitions. [2018-09-30 23:29:18,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:29:18,269 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 393 [2018-09-30 23:29:18,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:18,270 INFO L225 Difference]: With dead ends: 410 [2018-09-30 23:29:18,270 INFO L226 Difference]: Without dead ends: 404 [2018-09-30 23:29:18,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:29:18,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2018-09-30 23:29:18,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 400. [2018-09-30 23:29:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-09-30 23:29:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 402 transitions. [2018-09-30 23:29:18,326 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 402 transitions. Word has length 393 [2018-09-30 23:29:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:18,326 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 402 transitions. [2018-09-30 23:29:18,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:29:18,326 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 402 transitions. [2018-09-30 23:29:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2018-09-30 23:29:18,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:18,327 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 78, 1, 1, 1, 1, 1] [2018-09-30 23:29:18,327 INFO L423 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:18,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:18,328 INFO L82 PathProgramCache]: Analyzing trace with hash -2024168741, now seen corresponding path program 155 times [2018-09-30 23:29:18,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:18,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:18,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:18,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:18,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15405 backedges. 12324 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:25,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:25,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:25,855 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:29:26,196 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-09-30 23:29:26,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:26,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 15405 backedges. 12324 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:26,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:26,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159] total 159 [2018-09-30 23:29:26,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 23:29:26,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 23:29:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6479, Invalid=18961, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 23:29:26,349 INFO L87 Difference]: Start difference. First operand 400 states and 402 transitions. Second operand 160 states. [2018-09-30 23:29:36,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:36,629 INFO L93 Difference]: Finished difference Result 724 states and 728 transitions. [2018-09-30 23:29:36,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-09-30 23:29:36,630 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 397 [2018-09-30 23:29:36,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:36,630 INFO L225 Difference]: With dead ends: 724 [2018-09-30 23:29:36,630 INFO L226 Difference]: Without dead ends: 401 [2018-09-30 23:29:36,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9165 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=12957, Invalid=43925, Unknown=0, NotChecked=0, Total=56882 [2018-09-30 23:29:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2018-09-30 23:29:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2018-09-30 23:29:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2018-09-30 23:29:36,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 403 transitions. [2018-09-30 23:29:36,688 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 403 transitions. Word has length 397 [2018-09-30 23:29:36,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:36,688 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 403 transitions. [2018-09-30 23:29:36,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 23:29:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 403 transitions. [2018-09-30 23:29:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-09-30 23:29:36,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:36,689 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 79, 78, 78, 1, 1, 1, 1, 1] [2018-09-30 23:29:36,690 INFO L423 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:36,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:36,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1811551234, now seen corresponding path program 156 times [2018-09-30 23:29:36,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:36,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:36,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:36,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:36,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15484 backedges. 3316 proven. 12168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:39,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:39,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:39,349 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:29:39,723 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 23:29:39,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:39,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15484 backedges. 3316 proven. 12168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:39,864 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:39,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 23:29:39,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:29:39,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:29:39,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:29:39,865 INFO L87 Difference]: Start difference. First operand 401 states and 403 transitions. Second operand 82 states. [2018-09-30 23:29:40,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:40,633 INFO L93 Difference]: Finished difference Result 415 states and 418 transitions. [2018-09-30 23:29:40,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:29:40,634 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 398 [2018-09-30 23:29:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:40,634 INFO L225 Difference]: With dead ends: 415 [2018-09-30 23:29:40,634 INFO L226 Difference]: Without dead ends: 409 [2018-09-30 23:29:40,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:29:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2018-09-30 23:29:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 405. [2018-09-30 23:29:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2018-09-30 23:29:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 407 transitions. [2018-09-30 23:29:40,685 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 407 transitions. Word has length 398 [2018-09-30 23:29:40,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:40,685 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 407 transitions. [2018-09-30 23:29:40,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:29:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 407 transitions. [2018-09-30 23:29:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-09-30 23:29:40,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:40,686 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 79, 1, 1, 1, 1, 1] [2018-09-30 23:29:40,686 INFO L423 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:40,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:40,687 INFO L82 PathProgramCache]: Analyzing trace with hash 733558392, now seen corresponding path program 157 times [2018-09-30 23:29:40,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:40,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:40,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:40,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:40,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15800 backedges. 12640 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:47,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:47,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:47,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:29:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:48,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15800 backedges. 12640 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:48,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:48,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161] total 161 [2018-09-30 23:29:48,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 23:29:48,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 23:29:48,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6641, Invalid=19441, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:29:48,301 INFO L87 Difference]: Start difference. First operand 405 states and 407 transitions. Second operand 162 states. [2018-09-30 23:29:58,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:58,324 INFO L93 Difference]: Finished difference Result 733 states and 737 transitions. [2018-09-30 23:29:58,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-09-30 23:29:58,324 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 402 [2018-09-30 23:29:58,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:58,324 INFO L225 Difference]: With dead ends: 733 [2018-09-30 23:29:58,324 INFO L226 Difference]: Without dead ends: 406 [2018-09-30 23:29:58,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9401 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=13281, Invalid=45041, Unknown=0, NotChecked=0, Total=58322 [2018-09-30 23:29:58,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2018-09-30 23:29:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2018-09-30 23:29:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2018-09-30 23:29:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 408 transitions. [2018-09-30 23:29:58,383 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 408 transitions. Word has length 402 [2018-09-30 23:29:58,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:58,384 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 408 transitions. [2018-09-30 23:29:58,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 23:29:58,384 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 408 transitions. [2018-09-30 23:29:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-09-30 23:29:58,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:58,385 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 80, 79, 79, 1, 1, 1, 1, 1] [2018-09-30 23:29:58,385 INFO L423 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:58,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:58,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1095001521, now seen corresponding path program 158 times [2018-09-30 23:29:58,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:58,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:58,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:58,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:29:58,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 15880 backedges. 3398 proven. 12482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:01,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:01,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:01,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:30:01,503 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:30:01,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:01,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15880 backedges. 3398 proven. 12482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:01,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:01,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 23:30:01,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:30:01,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:30:01,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:30:01,653 INFO L87 Difference]: Start difference. First operand 406 states and 408 transitions. Second operand 83 states. [2018-09-30 23:30:02,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:02,215 INFO L93 Difference]: Finished difference Result 420 states and 423 transitions. [2018-09-30 23:30:02,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:30:02,215 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 403 [2018-09-30 23:30:02,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:02,216 INFO L225 Difference]: With dead ends: 420 [2018-09-30 23:30:02,216 INFO L226 Difference]: Without dead ends: 414 [2018-09-30 23:30:02,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:30:02,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2018-09-30 23:30:02,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 410. [2018-09-30 23:30:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2018-09-30 23:30:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 412 transitions. [2018-09-30 23:30:02,274 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 412 transitions. Word has length 403 [2018-09-30 23:30:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:02,274 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 412 transitions. [2018-09-30 23:30:02,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:30:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 412 transitions. [2018-09-30 23:30:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-09-30 23:30:02,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:02,276 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 80, 1, 1, 1, 1, 1] [2018-09-30 23:30:02,276 INFO L423 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:02,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:02,276 INFO L82 PathProgramCache]: Analyzing trace with hash -887809881, now seen corresponding path program 159 times [2018-09-30 23:30:02,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:02,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:02,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:02,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:02,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16200 backedges. 12960 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:09,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:09,775 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:09,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:30:10,262 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2018-09-30 23:30:10,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:10,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16200 backedges. 12960 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:10,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:10,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163] total 163 [2018-09-30 23:30:10,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-30 23:30:10,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-30 23:30:10,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6805, Invalid=19927, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:30:10,419 INFO L87 Difference]: Start difference. First operand 410 states and 412 transitions. Second operand 164 states. [2018-09-30 23:30:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:20,953 INFO L93 Difference]: Finished difference Result 742 states and 746 transitions. [2018-09-30 23:30:20,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-09-30 23:30:20,954 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 407 [2018-09-30 23:30:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:20,954 INFO L225 Difference]: With dead ends: 742 [2018-09-30 23:30:20,954 INFO L226 Difference]: Without dead ends: 411 [2018-09-30 23:30:20,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9640 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=13609, Invalid=46171, Unknown=0, NotChecked=0, Total=59780 [2018-09-30 23:30:20,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-09-30 23:30:21,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2018-09-30 23:30:21,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2018-09-30 23:30:21,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 413 transitions. [2018-09-30 23:30:21,014 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 413 transitions. Word has length 407 [2018-09-30 23:30:21,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:21,014 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 413 transitions. [2018-09-30 23:30:21,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-30 23:30:21,014 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 413 transitions. [2018-09-30 23:30:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-09-30 23:30:21,016 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:21,016 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 81, 80, 80, 1, 1, 1, 1, 1] [2018-09-30 23:30:21,016 INFO L423 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:21,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:21,016 INFO L82 PathProgramCache]: Analyzing trace with hash 158565646, now seen corresponding path program 160 times [2018-09-30 23:30:21,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:21,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:21,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:21,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:21,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16281 backedges. 3481 proven. 12800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:23,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:23,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:23,921 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:30:24,130 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:30:24,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:24,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16281 backedges. 3481 proven. 12800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:24,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:24,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 23:30:24,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:30:24,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:30:24,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:30:24,293 INFO L87 Difference]: Start difference. First operand 411 states and 413 transitions. Second operand 84 states. [2018-09-30 23:30:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:24,846 INFO L93 Difference]: Finished difference Result 425 states and 428 transitions. [2018-09-30 23:30:24,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:30:24,846 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 408 [2018-09-30 23:30:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:24,847 INFO L225 Difference]: With dead ends: 425 [2018-09-30 23:30:24,847 INFO L226 Difference]: Without dead ends: 419 [2018-09-30 23:30:24,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:30:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-09-30 23:30:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 415. [2018-09-30 23:30:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-09-30 23:30:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 417 transitions. [2018-09-30 23:30:24,923 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 417 transitions. Word has length 408 [2018-09-30 23:30:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:24,924 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 417 transitions. [2018-09-30 23:30:24,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:30:24,924 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 417 transitions. [2018-09-30 23:30:24,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-09-30 23:30:24,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:24,925 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 81, 1, 1, 1, 1, 1] [2018-09-30 23:30:24,925 INFO L423 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:24,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:24,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1648672380, now seen corresponding path program 161 times [2018-09-30 23:30:24,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:24,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:24,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:24,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:24,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16605 backedges. 13284 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:32,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:32,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:32,809 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:30:33,175 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2018-09-30 23:30:33,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:33,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16605 backedges. 13284 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:33,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:33,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165, 165] total 165 [2018-09-30 23:30:33,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-09-30 23:30:33,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-09-30 23:30:33,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6971, Invalid=20419, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:30:33,358 INFO L87 Difference]: Start difference. First operand 415 states and 417 transitions. Second operand 166 states. [2018-09-30 23:30:43,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:43,961 INFO L93 Difference]: Finished difference Result 751 states and 755 transitions. [2018-09-30 23:30:43,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-09-30 23:30:43,961 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 412 [2018-09-30 23:30:43,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:43,962 INFO L225 Difference]: With dead ends: 751 [2018-09-30 23:30:43,962 INFO L226 Difference]: Without dead ends: 416 [2018-09-30 23:30:43,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9882 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=13941, Invalid=47315, Unknown=0, NotChecked=0, Total=61256 [2018-09-30 23:30:43,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2018-09-30 23:30:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2018-09-30 23:30:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2018-09-30 23:30:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 418 transitions. [2018-09-30 23:30:44,023 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 418 transitions. Word has length 412 [2018-09-30 23:30:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:44,023 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 418 transitions. [2018-09-30 23:30:44,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-09-30 23:30:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 418 transitions. [2018-09-30 23:30:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-09-30 23:30:44,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:44,025 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 82, 81, 81, 1, 1, 1, 1, 1] [2018-09-30 23:30:44,025 INFO L423 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:44,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:44,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1522303619, now seen corresponding path program 162 times [2018-09-30 23:30:44,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:44,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:44,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:44,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:44,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16687 backedges. 3565 proven. 13122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:47,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:47,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:47,104 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:30:47,495 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2018-09-30 23:30:47,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:47,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16687 backedges. 3565 proven. 13122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:47,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:47,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 23:30:47,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 23:30:47,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 23:30:47,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:30:47,680 INFO L87 Difference]: Start difference. First operand 416 states and 418 transitions. Second operand 85 states. [2018-09-30 23:30:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:48,421 INFO L93 Difference]: Finished difference Result 430 states and 433 transitions. [2018-09-30 23:30:48,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:30:48,421 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 413 [2018-09-30 23:30:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:48,422 INFO L225 Difference]: With dead ends: 430 [2018-09-30 23:30:48,422 INFO L226 Difference]: Without dead ends: 424 [2018-09-30 23:30:48,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:30:48,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2018-09-30 23:30:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 420. [2018-09-30 23:30:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2018-09-30 23:30:48,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 422 transitions. [2018-09-30 23:30:48,481 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 422 transitions. Word has length 413 [2018-09-30 23:30:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:48,481 INFO L480 AbstractCegarLoop]: Abstraction has 420 states and 422 transitions. [2018-09-30 23:30:48,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 23:30:48,481 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 422 transitions. [2018-09-30 23:30:48,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2018-09-30 23:30:48,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:48,482 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 82, 1, 1, 1, 1, 1] [2018-09-30 23:30:48,483 INFO L423 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:48,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:48,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1726704243, now seen corresponding path program 163 times [2018-09-30 23:30:48,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:48,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:48,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:48,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:48,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17015 backedges. 13612 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:56,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:56,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:56,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:56,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 17015 backedges. 13612 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:56,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:56,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167, 167] total 167 [2018-09-30 23:30:56,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-09-30 23:30:56,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-09-30 23:30:56,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7139, Invalid=20917, Unknown=0, NotChecked=0, Total=28056 [2018-09-30 23:30:56,762 INFO L87 Difference]: Start difference. First operand 420 states and 422 transitions. Second operand 168 states. [2018-09-30 23:31:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:07,932 INFO L93 Difference]: Finished difference Result 760 states and 764 transitions. [2018-09-30 23:31:07,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-09-30 23:31:07,932 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 417 [2018-09-30 23:31:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:07,933 INFO L225 Difference]: With dead ends: 760 [2018-09-30 23:31:07,933 INFO L226 Difference]: Without dead ends: 421 [2018-09-30 23:31:07,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10127 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=14277, Invalid=48473, Unknown=0, NotChecked=0, Total=62750 [2018-09-30 23:31:07,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2018-09-30 23:31:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2018-09-30 23:31:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2018-09-30 23:31:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 423 transitions. [2018-09-30 23:31:07,996 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 423 transitions. Word has length 417 [2018-09-30 23:31:07,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:07,996 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 423 transitions. [2018-09-30 23:31:07,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-09-30 23:31:07,996 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 423 transitions. [2018-09-30 23:31:07,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-09-30 23:31:07,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:07,998 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 83, 82, 82, 1, 1, 1, 1, 1] [2018-09-30 23:31:07,998 INFO L423 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:07,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash 725008922, now seen corresponding path program 164 times [2018-09-30 23:31:07,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:07,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:07,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:07,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:31:07,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17098 backedges. 3650 proven. 13448 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:10,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:10,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:10,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:31:11,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:31:11,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:11,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17098 backedges. 3650 proven. 13448 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:11,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:11,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 23:31:11,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:31:11,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:31:11,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:31:11,287 INFO L87 Difference]: Start difference. First operand 421 states and 423 transitions. Second operand 86 states. [2018-09-30 23:31:11,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:11,864 INFO L93 Difference]: Finished difference Result 435 states and 438 transitions. [2018-09-30 23:31:11,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:31:11,865 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 418 [2018-09-30 23:31:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:11,865 INFO L225 Difference]: With dead ends: 435 [2018-09-30 23:31:11,865 INFO L226 Difference]: Without dead ends: 429 [2018-09-30 23:31:11,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:31:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2018-09-30 23:31:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 425. [2018-09-30 23:31:11,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2018-09-30 23:31:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 427 transitions. [2018-09-30 23:31:11,927 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 427 transitions. Word has length 418 [2018-09-30 23:31:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:11,928 INFO L480 AbstractCegarLoop]: Abstraction has 425 states and 427 transitions. [2018-09-30 23:31:11,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:31:11,928 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 427 transitions. [2018-09-30 23:31:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-09-30 23:31:11,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:11,929 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 83, 1, 1, 1, 1, 1] [2018-09-30 23:31:11,929 INFO L423 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:11,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:11,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2109663088, now seen corresponding path program 165 times [2018-09-30 23:31:11,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:11,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:11,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:11,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:11,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17430 backedges. 13944 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:20,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:20,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:20,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:31:20,639 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2018-09-30 23:31:20,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:20,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17430 backedges. 13944 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:20,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:20,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169, 169] total 169 [2018-09-30 23:31:20,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-09-30 23:31:20,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-09-30 23:31:20,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7309, Invalid=21421, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:31:20,821 INFO L87 Difference]: Start difference. First operand 425 states and 427 transitions. Second operand 170 states. [2018-09-30 23:31:32,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:32,335 INFO L93 Difference]: Finished difference Result 769 states and 773 transitions. [2018-09-30 23:31:32,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-09-30 23:31:32,335 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 422 [2018-09-30 23:31:32,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:32,335 INFO L225 Difference]: With dead ends: 769 [2018-09-30 23:31:32,335 INFO L226 Difference]: Without dead ends: 426 [2018-09-30 23:31:32,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10375 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=14617, Invalid=49645, Unknown=0, NotChecked=0, Total=64262 [2018-09-30 23:31:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2018-09-30 23:31:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 426. [2018-09-30 23:31:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2018-09-30 23:31:32,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 428 transitions. [2018-09-30 23:31:32,399 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 428 transitions. Word has length 422 [2018-09-30 23:31:32,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:32,399 INFO L480 AbstractCegarLoop]: Abstraction has 426 states and 428 transitions. [2018-09-30 23:31:32,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-09-30 23:31:32,399 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 428 transitions. [2018-09-30 23:31:32,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-09-30 23:31:32,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:32,400 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 84, 83, 83, 1, 1, 1, 1, 1] [2018-09-30 23:31:32,401 INFO L423 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:32,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:32,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1198354761, now seen corresponding path program 166 times [2018-09-30 23:31:32,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:32,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:32,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:32,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:32,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17514 backedges. 3736 proven. 13778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:35,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:35,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:35,646 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:31:35,864 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:31:35,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:35,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17514 backedges. 3736 proven. 13778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:36,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:36,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 23:31:36,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 23:31:36,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 23:31:36,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:31:36,056 INFO L87 Difference]: Start difference. First operand 426 states and 428 transitions. Second operand 87 states. [2018-09-30 23:31:36,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:36,653 INFO L93 Difference]: Finished difference Result 440 states and 443 transitions. [2018-09-30 23:31:36,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:31:36,654 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 423 [2018-09-30 23:31:36,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:36,654 INFO L225 Difference]: With dead ends: 440 [2018-09-30 23:31:36,654 INFO L226 Difference]: Without dead ends: 434 [2018-09-30 23:31:36,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:31:36,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-09-30 23:31:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 430. [2018-09-30 23:31:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2018-09-30 23:31:36,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 432 transitions. [2018-09-30 23:31:36,718 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 432 transitions. Word has length 423 [2018-09-30 23:31:36,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:36,719 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 432 transitions. [2018-09-30 23:31:36,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 23:31:36,719 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 432 transitions. [2018-09-30 23:31:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2018-09-30 23:31:36,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:36,720 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 84, 1, 1, 1, 1, 1] [2018-09-30 23:31:36,720 INFO L423 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:36,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:36,720 INFO L82 PathProgramCache]: Analyzing trace with hash 941529151, now seen corresponding path program 167 times [2018-09-30 23:31:36,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:36,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:36,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:36,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:36,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17850 backedges. 14280 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:45,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:45,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:45,255 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:31:45,638 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-30 23:31:45,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:45,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17850 backedges. 14280 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:45,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:45,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171, 171] total 171 [2018-09-30 23:31:45,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-09-30 23:31:45,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-09-30 23:31:45,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7481, Invalid=21931, Unknown=0, NotChecked=0, Total=29412 [2018-09-30 23:31:45,810 INFO L87 Difference]: Start difference. First operand 430 states and 432 transitions. Second operand 172 states. [2018-09-30 23:31:57,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:57,659 INFO L93 Difference]: Finished difference Result 778 states and 782 transitions. [2018-09-30 23:31:57,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-09-30 23:31:57,659 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 427 [2018-09-30 23:31:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:57,660 INFO L225 Difference]: With dead ends: 778 [2018-09-30 23:31:57,660 INFO L226 Difference]: Without dead ends: 431 [2018-09-30 23:31:57,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10626 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=14961, Invalid=50831, Unknown=0, NotChecked=0, Total=65792 [2018-09-30 23:31:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-09-30 23:31:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2018-09-30 23:31:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2018-09-30 23:31:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 433 transitions. [2018-09-30 23:31:57,725 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 433 transitions. Word has length 427 [2018-09-30 23:31:57,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:57,725 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 433 transitions. [2018-09-30 23:31:57,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-09-30 23:31:57,725 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 433 transitions. [2018-09-30 23:31:57,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2018-09-30 23:31:57,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:57,727 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 85, 84, 84, 1, 1, 1, 1, 1] [2018-09-30 23:31:57,727 INFO L423 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:57,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:57,727 INFO L82 PathProgramCache]: Analyzing trace with hash 882494246, now seen corresponding path program 168 times [2018-09-30 23:31:57,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:57,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:57,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:57,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:57,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17935 backedges. 3823 proven. 14112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:00,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:00,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:00,996 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:32:01,425 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 23:32:01,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:01,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17935 backedges. 3823 proven. 14112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:01,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:01,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 23:32:01,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:32:01,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:32:01,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:32:01,594 INFO L87 Difference]: Start difference. First operand 431 states and 433 transitions. Second operand 88 states. [2018-09-30 23:32:02,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:02,381 INFO L93 Difference]: Finished difference Result 445 states and 448 transitions. [2018-09-30 23:32:02,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:32:02,381 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 428 [2018-09-30 23:32:02,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:02,382 INFO L225 Difference]: With dead ends: 445 [2018-09-30 23:32:02,382 INFO L226 Difference]: Without dead ends: 439 [2018-09-30 23:32:02,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:32:02,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2018-09-30 23:32:02,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 435. [2018-09-30 23:32:02,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2018-09-30 23:32:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 437 transitions. [2018-09-30 23:32:02,447 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 437 transitions. Word has length 428 [2018-09-30 23:32:02,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:02,447 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 437 transitions. [2018-09-30 23:32:02,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:32:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 437 transitions. [2018-09-30 23:32:02,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-09-30 23:32:02,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:02,449 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 85, 1, 1, 1, 1, 1] [2018-09-30 23:32:02,449 INFO L423 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:02,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:02,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1583301732, now seen corresponding path program 169 times [2018-09-30 23:32:02,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:02,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:02,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:02,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:02,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 23:32:04,547 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 23:32:04,551 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 23:32:04,552 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:32:04 BoogieIcfgContainer [2018-09-30 23:32:04,552 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 23:32:04,553 INFO L168 Benchmark]: Toolchain (without parser) took 764892.57 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 146.8 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 418.6 MB). Peak memory consumption was 565.4 MB. Max. memory is 7.1 GB. [2018-09-30 23:32:04,554 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:32:04,555 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:32:04,555 INFO L168 Benchmark]: Boogie Preprocessor took 20.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:32:04,555 INFO L168 Benchmark]: RCFGBuilder took 355.53 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 23:32:04,556 INFO L168 Benchmark]: TraceAbstraction took 764474.22 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 146.8 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 397.5 MB). Peak memory consumption was 544.3 MB. Max. memory is 7.1 GB. [2018-09-30 23:32:04,558 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 37.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 355.53 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 764474.22 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 146.8 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 397.5 MB). Peak memory consumption was 544.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 76). Cancelled while BasicCegarLoop was analyzing trace of length 433 with TraceHistMax 86, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 68 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 764.4s OverallTime, 173 OverallIterations, 86 TraceHistogramMax, 353.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8012 SDtfs, 18034 SDslu, 214904 SDs, 0 SdLazy, 233260 SolverSat, 4146 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 121.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55245 GetRequests, 40536 SyntacticMatches, 0 SemanticMatches, 14709 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303450 ImplicationChecksByTransitivity, 501.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=435occurred in iteration=172, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.8s AutomataMinimizationTime, 172 MinimizatonAttempts, 346 StatesRemovedByMinimization, 87 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 4.3s SsaConstructionTime, 26.4s SatisfiabilityAnalysisTime, 360.1s InterpolantComputationTime, 73950 NumberOfCodeBlocks, 73950 NumberOfCodeBlocksAsserted, 4022 NumberOfCheckSat, 73610 ConstructedInterpolants, 0 QuantifiedInterpolants, 62645834 SizeOfPredicates, 336 NumberOfNonLiveVariables, 118020 ConjunctsInSsa, 14868 ConjunctsInUnsatCore, 340 InterpolantComputations, 4 PerfectInterpolantSequences, 1044990/2054110 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_23-32-04-567.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_23-32-04-567.csv Completed graceful shutdown