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/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:22:14,364 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:22:14,369 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:22:14,386 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-23 21:22:14,425 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 [2018-09-23 21:22:14,447 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:22:14,447 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:22:14,448 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:22:14,448 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:22:14,449 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:22:14,449 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:22:14,450 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:22:14,450 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:22:14,450 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:22:14,450 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:22:14,450 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:22:14,451 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:22:14,451 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:22:14,451 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:22:14,451 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:22:14,451 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:22:14,452 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:22:14,452 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:22:14,453 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:22:14,453 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:22:14,453 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:22:14,453 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:22:14,453 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:22:14,453 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:22:14,454 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:22:14,454 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:22:14,454 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:22:14,454 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:22:14,455 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:22:14,455 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:22:14,511 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:22:14,524 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:22:14,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:22:14,530 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:22:14,530 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:22:14,531 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-09-23 21:22:14,531 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl' [2018-09-23 21:22:14,582 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:22:14,585 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:22:14,586 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:22:14,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:22:14,587 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:22:14,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:14" (1/1) ... [2018-09-23 21:22:14,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:14" (1/1) ... [2018-09-23 21:22:14,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:22:14,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:22:14,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:22:14,629 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:22:14,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:14" (1/1) ... [2018-09-23 21:22:14,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:14" (1/1) ... [2018-09-23 21:22:14,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:14" (1/1) ... [2018-09-23 21:22:14,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:14" (1/1) ... [2018-09-23 21:22:14,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:14" (1/1) ... [2018-09-23 21:22:14,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:14" (1/1) ... [2018-09-23 21:22:14,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:14" (1/1) ... [2018-09-23 21:22:14,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:22:14,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:22:14,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:22:14,651 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:22:14,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:14" (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 [2018-09-23 21:22:14,738 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-23 21:22:14,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 21:22:14,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 21:22:15,024 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 21:22:15,025 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:22:15 BoogieIcfgContainer [2018-09-23 21:22:15,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:22:15,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:22:15,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:22:15,030 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:22:15,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:14" (1/2) ... [2018-09-23 21:22:15,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378de387 and model type nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:22:15, skipping insertion in model container [2018-09-23 21:22:15,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:22:15" (2/2) ... [2018-09-23 21:22:15,035 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-09-23 21:22:15,045 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:22:15,054 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:22:15,112 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:22:15,113 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:22:15,114 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:22:15,114 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:22:15,114 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:22:15,114 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:22:15,114 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:22:15,115 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:22:15,115 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:22:15,133 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-23 21:22:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 21:22:15,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:15,142 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 21:22:15,145 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:15,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:15,152 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-09-23 21:22:15,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:15,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:15,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:15,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:15,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:15,311 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:22:15,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 21:22:15,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:22:15,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:22:15,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:22:15,333 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-23 21:22:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:15,390 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2018-09-23 21:22:15,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:22:15,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 21:22:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:15,404 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:22:15,404 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 21:22:15,408 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 [2018-09-23 21:22:15,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 21:22:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-23 21:22:15,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 21:22:15,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-23 21:22:15,484 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-23 21:22:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:15,485 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-23 21:22:15,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:22:15,486 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-23 21:22:15,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 21:22:15,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:15,486 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 21:22:15,487 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:15,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:15,487 INFO L82 PathProgramCache]: Analyzing trace with hash 28854189, now seen corresponding path program 1 times [2018-09-23 21:22:15,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:15,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:15,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:15,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:15,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:15,569 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:22:15,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 21:22:15,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:22:15,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:22:15,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:22:15,572 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 3 states. [2018-09-23 21:22:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:15,602 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-23 21:22:15,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:22:15,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-23 21:22:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:15,604 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:22:15,604 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 21:22:15,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:22:15,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 21:22:15,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 21:22:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 21:22:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-09-23 21:22:15,608 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-09-23 21:22:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:15,609 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-09-23 21:22:15,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:22:15,609 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-09-23 21:22:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 21:22:15,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:15,610 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-23 21:22:15,610 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:15,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:15,611 INFO L82 PathProgramCache]: Analyzing trace with hash 894431694, now seen corresponding path program 1 times [2018-09-23 21:22:15,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:15,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:15,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:15,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:15,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:15,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:15,721 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 [2018-09-23 21:22:15,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:15,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:15,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:15,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:22:15,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:22:15,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:22:15,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:22:15,805 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-09-23 21:22:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:15,933 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2018-09-23 21:22:15,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:22:15,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-23 21:22:15,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:15,936 INFO L225 Difference]: With dead ends: 13 [2018-09-23 21:22:15,936 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 21:22:15,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:22:15,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 21:22:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 21:22:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 21:22:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-09-23 21:22:15,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-09-23 21:22:15,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:15,947 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-09-23 21:22:15,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:22:15,947 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-09-23 21:22:15,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:22:15,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:15,948 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-23 21:22:15,949 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:15,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:15,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1957530573, now seen corresponding path program 2 times [2018-09-23 21:22:15,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:15,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:15,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:15,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:15,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 21:22:16,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:16,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:16,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:16,134 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:16,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:16,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:16,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:16,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5] total 7 [2018-09-23 21:22:16,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:22:16,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:22:16,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:22:16,261 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 7 states. [2018-09-23 21:22:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:16,799 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2018-09-23 21:22:16,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:22:16,800 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-23 21:22:16,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:16,801 INFO L225 Difference]: With dead ends: 24 [2018-09-23 21:22:16,801 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 21:22:16,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:22:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 21:22:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-09-23 21:22:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 21:22:16,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-23 21:22:16,808 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2018-09-23 21:22:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:16,808 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-23 21:22:16,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:22:16,808 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-23 21:22:16,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 21:22:16,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:16,809 INFO L375 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1] [2018-09-23 21:22:16,810 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:16,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:16,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1143121891, now seen corresponding path program 3 times [2018-09-23 21:22:16,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:16,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:16,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:16,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:16,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-23 21:22:16,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:16,885 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 [2018-09-23 21:22:16,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:16,934 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 21:22:16,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:16,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-23 21:22:16,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:16,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:22:16,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:22:16,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:22:16,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:22:16,967 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-09-23 21:22:17,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:17,095 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-09-23 21:22:17,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:22:17,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-09-23 21:22:17,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:17,099 INFO L225 Difference]: With dead ends: 24 [2018-09-23 21:22:17,099 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 21:22:17,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:22:17,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 21:22:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 21:22:17,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 21:22:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-23 21:22:17,106 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-09-23 21:22:17,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:17,108 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-23 21:22:17,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:22:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-23 21:22:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 21:22:17,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:17,110 INFO L375 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1] [2018-09-23 21:22:17,111 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:17,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:17,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1762706263, now seen corresponding path program 4 times [2018-09-23 21:22:17,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:17,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:17,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:17,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:17,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-23 21:22:17,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:17,215 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 [2018-09-23 21:22:17,223 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:17,246 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:17,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:17,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-23 21:22:17,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:17,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2018-09-23 21:22:17,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:22:17,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:22:17,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:22:17,347 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 10 states. [2018-09-23 21:22:18,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:18,090 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2018-09-23 21:22:18,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:22:18,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-09-23 21:22:18,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:18,091 INFO L225 Difference]: With dead ends: 40 [2018-09-23 21:22:18,092 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:22:18,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:22:18,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:22:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2018-09-23 21:22:18,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:22:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-09-23 21:22:18,099 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2018-09-23 21:22:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:18,100 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-09-23 21:22:18,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:22:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-09-23 21:22:18,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:22:18,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:18,101 INFO L375 BasicCegarLoop]: trace histogram [15, 3, 3, 1, 1, 1] [2018-09-23 21:22:18,101 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:18,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:18,102 INFO L82 PathProgramCache]: Analyzing trace with hash 198739950, now seen corresponding path program 5 times [2018-09-23 21:22:18,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:18,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:18,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:18,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:18,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-23 21:22:18,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:18,207 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 [2018-09-23 21:22:18,216 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:18,231 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 21:22:18,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:18,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-09-23 21:22:18,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:18,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2018-09-23 21:22:18,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:22:18,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:22:18,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:22:18,363 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 12 states. [2018-09-23 21:22:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:19,128 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2018-09-23 21:22:19,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:22:19,131 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2018-09-23 21:22:19,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:19,131 INFO L225 Difference]: With dead ends: 60 [2018-09-23 21:22:19,132 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:22:19,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:22:19,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:22:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2018-09-23 21:22:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 21:22:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-09-23 21:22:19,141 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2018-09-23 21:22:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:19,142 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-09-23 21:22:19,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:22:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-09-23 21:22:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 21:22:19,143 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:19,143 INFO L375 BasicCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1] [2018-09-23 21:22:19,143 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:19,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:19,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1597467349, now seen corresponding path program 6 times [2018-09-23 21:22:19,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:19,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:19,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:19,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:19,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-09-23 21:22:19,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:19,253 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 [2018-09-23 21:22:19,266 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:19,314 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 21:22:19,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:19,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-09-23 21:22:19,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:19,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:22:19,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:22:19,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:22:19,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:22:19,352 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2018-09-23 21:22:19,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:19,387 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2018-09-23 21:22:19,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:22:19,391 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-09-23 21:22:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:19,392 INFO L225 Difference]: With dead ends: 67 [2018-09-23 21:22:19,392 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 21:22:19,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:22:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 21:22:19,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 21:22:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 21:22:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-09-23 21:22:19,401 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2018-09-23 21:22:19,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:19,402 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-09-23 21:22:19,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:22:19,402 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-09-23 21:22:19,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 21:22:19,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:19,404 INFO L375 BasicCegarLoop]: trace histogram [28, 4, 4, 1, 1, 1] [2018-09-23 21:22:19,404 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:19,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:19,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1404785213, now seen corresponding path program 7 times [2018-09-23 21:22:19,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:19,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:19,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:19,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:19,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-09-23 21:22:19,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:19,612 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 [2018-09-23 21:22:19,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:19,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-09-23 21:22:19,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:19,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2018-09-23 21:22:19,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:22:19,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:22:19,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:22:19,826 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 15 states. [2018-09-23 21:22:21,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:21,544 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2018-09-23 21:22:21,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:22:21,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2018-09-23 21:22:21,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:21,546 INFO L225 Difference]: With dead ends: 93 [2018-09-23 21:22:21,546 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 21:22:21,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=945, Invalid=2025, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:22:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 21:22:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2018-09-23 21:22:21,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 21:22:21,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-09-23 21:22:21,561 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2018-09-23 21:22:21,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:21,561 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-09-23 21:22:21,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:22:21,562 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-09-23 21:22:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 21:22:21,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:21,563 INFO L375 BasicCegarLoop]: trace histogram [40, 5, 5, 1, 1, 1] [2018-09-23 21:22:21,564 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:21,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:21,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1154943019, now seen corresponding path program 8 times [2018-09-23 21:22:21,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:21,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:21,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:21,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:21,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 825 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-09-23 21:22:21,692 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:21,692 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 [2018-09-23 21:22:21,732 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:21,796 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:21,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:21,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2018-09-23 21:22:22,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:22,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2018-09-23 21:22:22,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:22:22,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:22:22,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:22:22,123 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 17 states. [2018-09-23 21:22:23,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:23,511 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2018-09-23 21:22:23,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:22:23,511 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2018-09-23 21:22:23,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:23,512 INFO L225 Difference]: With dead ends: 123 [2018-09-23 21:22:23,512 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 21:22:23,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1540, Invalid=3430, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:22:23,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 21:22:23,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2018-09-23 21:22:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 21:22:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2018-09-23 21:22:23,529 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 53 [2018-09-23 21:22:23,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:23,529 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2018-09-23 21:22:23,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:22:23,529 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2018-09-23 21:22:23,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 21:22:23,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:23,531 INFO L375 BasicCegarLoop]: trace histogram [54, 6, 6, 1, 1, 1] [2018-09-23 21:22:23,532 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:23,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:23,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2076506525, now seen corresponding path program 9 times [2018-09-23 21:22:23,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:23,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:23,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:23,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:23,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-09-23 21:22:23,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:23,688 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 [2018-09-23 21:22:23,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:23,723 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 21:22:23,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:23,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-09-23 21:22:23,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:23,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 19 [2018-09-23 21:22:23,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:22:23,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:22:23,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:22:23,879 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 19 states. [2018-09-23 21:22:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:28,369 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2018-09-23 21:22:28,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 21:22:28,371 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2018-09-23 21:22:28,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:28,372 INFO L225 Difference]: With dead ends: 157 [2018-09-23 21:22:28,372 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 21:22:28,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2376, Invalid=5456, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:22:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 21:22:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2018-09-23 21:22:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 21:22:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2018-09-23 21:22:28,394 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 69 [2018-09-23 21:22:28,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:28,394 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2018-09-23 21:22:28,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:22:28,394 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2018-09-23 21:22:28,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 21:22:28,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:28,396 INFO L375 BasicCegarLoop]: trace histogram [70, 7, 7, 1, 1, 1] [2018-09-23 21:22:28,397 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:28,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:28,397 INFO L82 PathProgramCache]: Analyzing trace with hash -815084279, now seen corresponding path program 10 times [2018-09-23 21:22:28,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:28,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:28,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:28,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:28,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-09-23 21:22:28,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:28,734 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 [2018-09-23 21:22:28,742 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:28,795 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:28,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:28,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-09-23 21:22:28,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:28,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:22:28,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:22:28,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:22:28,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:22:28,878 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 10 states. [2018-09-23 21:22:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:29,057 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2018-09-23 21:22:29,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:22:29,058 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2018-09-23 21:22:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:29,059 INFO L225 Difference]: With dead ends: 113 [2018-09-23 21:22:29,059 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 21:22:29,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:22:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 21:22:29,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2018-09-23 21:22:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 21:22:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2018-09-23 21:22:29,080 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 87 [2018-09-23 21:22:29,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:29,080 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2018-09-23 21:22:29,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:22:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2018-09-23 21:22:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 21:22:29,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:29,083 INFO L375 BasicCegarLoop]: trace histogram [80, 8, 8, 1, 1, 1] [2018-09-23 21:22:29,083 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:29,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash 558484307, now seen corresponding path program 11 times [2018-09-23 21:22:29,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:29,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:29,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:29,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:29,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-23 21:22:29,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:29,253 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 [2018-09-23 21:22:29,262 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:29,634 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 21:22:29,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:29,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-23 21:22:29,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:29,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:22:29,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:22:29,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:22:29,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:22:29,697 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 11 states. [2018-09-23 21:22:29,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:29,861 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2018-09-23 21:22:29,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:22:29,862 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2018-09-23 21:22:29,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:29,863 INFO L225 Difference]: With dead ends: 125 [2018-09-23 21:22:29,863 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 21:22:29,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:22:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 21:22:29,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2018-09-23 21:22:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 21:22:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2018-09-23 21:22:29,886 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 99 [2018-09-23 21:22:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:29,887 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2018-09-23 21:22:29,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:22:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2018-09-23 21:22:29,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-23 21:22:29,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:29,889 INFO L375 BasicCegarLoop]: trace histogram [90, 9, 9, 1, 1, 1] [2018-09-23 21:22:29,889 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:29,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:29,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2005161315, now seen corresponding path program 12 times [2018-09-23 21:22:29,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:29,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:29,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:29,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:29,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-09-23 21:22:30,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:30,193 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 [2018-09-23 21:22:30,202 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:30,291 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-09-23 21:22:30,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:30,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-09-23 21:22:30,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:30,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:22:30,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:22:30,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:22:30,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:22:30,342 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand 12 states. [2018-09-23 21:22:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:30,566 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2018-09-23 21:22:30,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:22:30,567 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2018-09-23 21:22:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:30,568 INFO L225 Difference]: With dead ends: 137 [2018-09-23 21:22:30,568 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 21:22:30,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:22:30,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 21:22:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 124. [2018-09-23 21:22:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-23 21:22:30,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2018-09-23 21:22:30,594 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 111 [2018-09-23 21:22:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:30,594 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2018-09-23 21:22:30,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:22:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2018-09-23 21:22:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-23 21:22:30,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:30,596 INFO L375 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1] [2018-09-23 21:22:30,596 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:30,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:30,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1028199705, now seen corresponding path program 13 times [2018-09-23 21:22:30,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:30,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:30,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:30,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:30,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-23 21:22:30,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:30,927 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 [2018-09-23 21:22:30,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:31,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-23 21:22:31,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:31,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 21:22:31,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:22:31,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:22:31,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:22:31,067 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 13 states. [2018-09-23 21:22:31,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:31,366 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2018-09-23 21:22:31,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:22:31,366 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-09-23 21:22:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:31,367 INFO L225 Difference]: With dead ends: 149 [2018-09-23 21:22:31,367 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 21:22:31,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:22:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 21:22:31,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2018-09-23 21:22:31,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-23 21:22:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2018-09-23 21:22:31,394 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 123 [2018-09-23 21:22:31,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:31,395 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2018-09-23 21:22:31,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:22:31,395 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2018-09-23 21:22:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-23 21:22:31,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:31,396 INFO L375 BasicCegarLoop]: trace histogram [110, 11, 11, 1, 1, 1] [2018-09-23 21:22:31,397 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:31,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:31,397 INFO L82 PathProgramCache]: Analyzing trace with hash 804391985, now seen corresponding path program 14 times [2018-09-23 21:22:31,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:31,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:31,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:31,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:31,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-09-23 21:22:31,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:31,713 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 [2018-09-23 21:22:31,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:31,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:31,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:31,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-09-23 21:22:31,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:31,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:22:31,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:22:31,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:22:31,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:22:31,875 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 14 states. [2018-09-23 21:22:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:31,959 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2018-09-23 21:22:31,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:22:31,960 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2018-09-23 21:22:31,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:31,961 INFO L225 Difference]: With dead ends: 161 [2018-09-23 21:22:31,961 INFO L226 Difference]: Without dead ends: 159 [2018-09-23 21:22:31,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:22:31,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-23 21:22:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2018-09-23 21:22:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-23 21:22:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2018-09-23 21:22:31,991 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 135 [2018-09-23 21:22:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:31,992 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2018-09-23 21:22:31,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:22:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2018-09-23 21:22:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-23 21:22:31,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:31,994 INFO L375 BasicCegarLoop]: trace histogram [120, 12, 12, 1, 1, 1] [2018-09-23 21:22:31,994 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:31,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:31,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1919127163, now seen corresponding path program 15 times [2018-09-23 21:22:31,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:31,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:31,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:31,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:31,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-23 21:22:32,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:32,266 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 [2018-09-23 21:22:32,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:32,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 73 check-sat command(s) [2018-09-23 21:22:32,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:32,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-23 21:22:32,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:32,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:22:32,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:22:32,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:22:32,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:22:32,479 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 15 states. [2018-09-23 21:22:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:32,640 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2018-09-23 21:22:32,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:22:32,640 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2018-09-23 21:22:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:32,641 INFO L225 Difference]: With dead ends: 173 [2018-09-23 21:22:32,642 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 21:22:32,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:22:32,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 21:22:32,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2018-09-23 21:22:32,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-23 21:22:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2018-09-23 21:22:32,677 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 147 [2018-09-23 21:22:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:32,677 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2018-09-23 21:22:32,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:22:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2018-09-23 21:22:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-23 21:22:32,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:32,679 INFO L375 BasicCegarLoop]: trace histogram [130, 13, 13, 1, 1, 1] [2018-09-23 21:22:32,680 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:32,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:32,680 INFO L82 PathProgramCache]: Analyzing trace with hash 243397061, now seen corresponding path program 16 times [2018-09-23 21:22:32,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:32,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:32,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:32,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:32,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-09-23 21:22:33,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:33,709 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 [2018-09-23 21:22:33,718 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:33,815 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:33,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:33,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-09-23 21:22:33,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:33,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:22:33,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:22:33,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:22:33,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:22:33,901 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 16 states. [2018-09-23 21:22:33,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:34,000 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2018-09-23 21:22:34,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:22:34,000 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2018-09-23 21:22:34,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:34,001 INFO L225 Difference]: With dead ends: 185 [2018-09-23 21:22:34,001 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 21:22:34,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:22:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 21:22:34,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2018-09-23 21:22:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-23 21:22:34,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2018-09-23 21:22:34,032 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 159 [2018-09-23 21:22:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:34,033 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2018-09-23 21:22:34,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:22:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2018-09-23 21:22:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-09-23 21:22:34,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:34,035 INFO L375 BasicCegarLoop]: trace histogram [140, 14, 14, 1, 1, 1] [2018-09-23 21:22:34,035 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:34,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:34,036 INFO L82 PathProgramCache]: Analyzing trace with hash 184792591, now seen corresponding path program 17 times [2018-09-23 21:22:34,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:34,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:34,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:34,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:34,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-23 21:22:34,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:34,311 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 [2018-09-23 21:22:34,326 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:34,542 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-23 21:22:34,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:34,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-23 21:22:34,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:34,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:22:34,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:22:34,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:22:34,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:22:34,615 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand 17 states. [2018-09-23 21:22:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:34,885 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2018-09-23 21:22:34,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:22:34,885 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2018-09-23 21:22:34,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:34,886 INFO L225 Difference]: With dead ends: 197 [2018-09-23 21:22:34,886 INFO L226 Difference]: Without dead ends: 195 [2018-09-23 21:22:34,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:22:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-23 21:22:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 184. [2018-09-23 21:22:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-23 21:22:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2018-09-23 21:22:34,920 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 171 [2018-09-23 21:22:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:34,920 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2018-09-23 21:22:34,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:22:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2018-09-23 21:22:34,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-23 21:22:34,922 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:34,922 INFO L375 BasicCegarLoop]: trace histogram [150, 15, 15, 1, 1, 1] [2018-09-23 21:22:34,923 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:34,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:34,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1864410279, now seen corresponding path program 18 times [2018-09-23 21:22:34,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:34,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:34,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:34,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:34,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-09-23 21:22:35,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:35,348 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 [2018-09-23 21:22:35,356 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:35,894 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-23 21:22:35,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:35,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-09-23 21:22:35,955 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:35,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:22:35,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:22:35,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:22:35,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:22:35,956 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand 18 states. [2018-09-23 21:22:36,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:36,079 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2018-09-23 21:22:36,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:22:36,079 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2018-09-23 21:22:36,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:36,080 INFO L225 Difference]: With dead ends: 209 [2018-09-23 21:22:36,080 INFO L226 Difference]: Without dead ends: 207 [2018-09-23 21:22:36,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:22:36,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-23 21:22:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2018-09-23 21:22:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-23 21:22:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2018-09-23 21:22:36,118 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 183 [2018-09-23 21:22:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:36,118 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2018-09-23 21:22:36,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:22:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2018-09-23 21:22:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-23 21:22:36,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:36,120 INFO L375 BasicCegarLoop]: trace histogram [160, 16, 16, 1, 1, 1] [2018-09-23 21:22:36,120 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:36,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:36,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1957994077, now seen corresponding path program 19 times [2018-09-23 21:22:36,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:36,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:36,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:36,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:36,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-23 21:22:36,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:36,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:36,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:37,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-23 21:22:37,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:37,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:22:37,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:22:37,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:22:37,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:22:37,159 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand 19 states. [2018-09-23 21:22:37,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:37,294 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2018-09-23 21:22:37,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:22:37,295 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 195 [2018-09-23 21:22:37,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:37,296 INFO L225 Difference]: With dead ends: 221 [2018-09-23 21:22:37,296 INFO L226 Difference]: Without dead ends: 219 [2018-09-23 21:22:37,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:22:37,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-23 21:22:37,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2018-09-23 21:22:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-23 21:22:37,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2018-09-23 21:22:37,336 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 195 [2018-09-23 21:22:37,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:37,337 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2018-09-23 21:22:37,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:22:37,337 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2018-09-23 21:22:37,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-23 21:22:37,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:37,338 INFO L375 BasicCegarLoop]: trace histogram [170, 17, 17, 1, 1, 1] [2018-09-23 21:22:37,339 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:37,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:37,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1203652845, now seen corresponding path program 20 times [2018-09-23 21:22:37,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:37,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:37,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:37,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:37,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-09-23 21:22:37,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:37,739 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 [2018-09-23 21:22:37,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:37,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:37,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:37,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-09-23 21:22:37,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:37,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:22:37,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:22:37,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:22:37,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:22:37,974 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand 20 states. [2018-09-23 21:22:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:38,117 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2018-09-23 21:22:38,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:22:38,119 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 207 [2018-09-23 21:22:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:38,120 INFO L225 Difference]: With dead ends: 233 [2018-09-23 21:22:38,120 INFO L226 Difference]: Without dead ends: 231 [2018-09-23 21:22:38,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:22:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-23 21:22:38,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2018-09-23 21:22:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-09-23 21:22:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 238 transitions. [2018-09-23 21:22:38,166 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 238 transitions. Word has length 207 [2018-09-23 21:22:38,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:38,166 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 238 transitions. [2018-09-23 21:22:38,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:22:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 238 transitions. [2018-09-23 21:22:38,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-09-23 21:22:38,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:38,168 INFO L375 BasicCegarLoop]: trace histogram [180, 18, 18, 1, 1, 1] [2018-09-23 21:22:38,168 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:38,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:38,168 INFO L82 PathProgramCache]: Analyzing trace with hash 367956279, now seen corresponding path program 21 times [2018-09-23 21:22:38,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:38,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:38,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:38,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:38,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-23 21:22:38,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:38,865 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 [2018-09-23 21:22:38,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:39,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 109 check-sat command(s) [2018-09-23 21:22:39,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:39,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-23 21:22:39,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:39,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:22:39,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:22:39,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:22:39,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:22:39,200 INFO L87 Difference]: Start difference. First operand 220 states and 238 transitions. Second operand 21 states. [2018-09-23 21:22:39,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:39,341 INFO L93 Difference]: Finished difference Result 245 states and 265 transitions. [2018-09-23 21:22:39,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:22:39,342 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 219 [2018-09-23 21:22:39,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:39,343 INFO L225 Difference]: With dead ends: 245 [2018-09-23 21:22:39,343 INFO L226 Difference]: Without dead ends: 243 [2018-09-23 21:22:39,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:22:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-23 21:22:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 232. [2018-09-23 21:22:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-09-23 21:22:39,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 251 transitions. [2018-09-23 21:22:39,396 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 251 transitions. Word has length 219 [2018-09-23 21:22:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:39,396 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 251 transitions. [2018-09-23 21:22:39,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:22:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 251 transitions. [2018-09-23 21:22:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-09-23 21:22:39,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:39,398 INFO L375 BasicCegarLoop]: trace histogram [190, 19, 19, 1, 1, 1] [2018-09-23 21:22:39,398 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:39,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:39,398 INFO L82 PathProgramCache]: Analyzing trace with hash -405620095, now seen corresponding path program 22 times [2018-09-23 21:22:39,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:39,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:39,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:39,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:39,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-09-23 21:22:39,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:39,827 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 [2018-09-23 21:22:39,834 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:39,952 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:39,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:39,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-09-23 21:22:40,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:40,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:22:40,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:22:40,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:22:40,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:22:40,025 INFO L87 Difference]: Start difference. First operand 232 states and 251 transitions. Second operand 22 states. [2018-09-23 21:22:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:40,237 INFO L93 Difference]: Finished difference Result 257 states and 278 transitions. [2018-09-23 21:22:40,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:22:40,246 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2018-09-23 21:22:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:40,247 INFO L225 Difference]: With dead ends: 257 [2018-09-23 21:22:40,248 INFO L226 Difference]: Without dead ends: 255 [2018-09-23 21:22:40,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:22:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-23 21:22:40,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2018-09-23 21:22:40,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-09-23 21:22:40,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2018-09-23 21:22:40,319 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 231 [2018-09-23 21:22:40,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:40,320 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2018-09-23 21:22:40,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:22:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2018-09-23 21:22:40,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-23 21:22:40,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:40,321 INFO L375 BasicCegarLoop]: trace histogram [200, 20, 20, 1, 1, 1] [2018-09-23 21:22:40,322 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:40,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:40,322 INFO L82 PathProgramCache]: Analyzing trace with hash -241089333, now seen corresponding path program 23 times [2018-09-23 21:22:40,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:40,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:40,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:40,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:40,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-09-23 21:22:40,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:40,771 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 [2018-09-23 21:22:40,778 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:41,154 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 121 check-sat command(s) [2018-09-23 21:22:41,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:41,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-09-23 21:22:41,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:41,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:22:41,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:22:41,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:22:41,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:22:41,277 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand 23 states. [2018-09-23 21:22:41,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:41,452 INFO L93 Difference]: Finished difference Result 269 states and 291 transitions. [2018-09-23 21:22:41,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:22:41,453 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 243 [2018-09-23 21:22:41,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:41,454 INFO L225 Difference]: With dead ends: 269 [2018-09-23 21:22:41,454 INFO L226 Difference]: Without dead ends: 267 [2018-09-23 21:22:41,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:22:41,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-23 21:22:41,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2018-09-23 21:22:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-09-23 21:22:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 277 transitions. [2018-09-23 21:22:41,514 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 277 transitions. Word has length 243 [2018-09-23 21:22:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:41,515 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 277 transitions. [2018-09-23 21:22:41,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:22:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 277 transitions. [2018-09-23 21:22:41,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-23 21:22:41,516 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:41,517 INFO L375 BasicCegarLoop]: trace histogram [210, 21, 21, 1, 1, 1] [2018-09-23 21:22:41,517 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:41,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:41,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1238413333, now seen corresponding path program 24 times [2018-09-23 21:22:41,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:41,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:41,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:41,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:41,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-09-23 21:22:42,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:42,913 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 [2018-09-23 21:22:42,921 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:43,240 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 123 check-sat command(s) [2018-09-23 21:22:43,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:43,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-09-23 21:22:43,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:43,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:22:43,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:22:43,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:22:43,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:22:43,325 INFO L87 Difference]: Start difference. First operand 256 states and 277 transitions. Second operand 24 states. [2018-09-23 21:22:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:43,859 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2018-09-23 21:22:43,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:22:43,859 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 255 [2018-09-23 21:22:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:43,861 INFO L225 Difference]: With dead ends: 281 [2018-09-23 21:22:43,861 INFO L226 Difference]: Without dead ends: 279 [2018-09-23 21:22:43,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:22:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-23 21:22:43,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 268. [2018-09-23 21:22:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-09-23 21:22:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2018-09-23 21:22:43,955 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 255 [2018-09-23 21:22:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:43,955 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2018-09-23 21:22:43,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:22:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2018-09-23 21:22:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-09-23 21:22:43,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:43,957 INFO L375 BasicCegarLoop]: trace histogram [220, 22, 22, 1, 1, 1] [2018-09-23 21:22:43,957 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:43,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:43,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1994949537, now seen corresponding path program 25 times [2018-09-23 21:22:43,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:43,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:43,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:43,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:43,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-09-23 21:22:44,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:44,654 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 [2018-09-23 21:22:44,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:44,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-09-23 21:22:44,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:44,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 21:22:44,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:22:44,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:22:44,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:22:44,930 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand 25 states. [2018-09-23 21:22:45,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:45,799 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2018-09-23 21:22:45,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:22:45,801 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 267 [2018-09-23 21:22:45,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:45,802 INFO L225 Difference]: With dead ends: 293 [2018-09-23 21:22:45,803 INFO L226 Difference]: Without dead ends: 291 [2018-09-23 21:22:45,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:22:45,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-23 21:22:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 280. [2018-09-23 21:22:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-09-23 21:22:45,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 303 transitions. [2018-09-23 21:22:45,875 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 303 transitions. Word has length 267 [2018-09-23 21:22:45,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:45,876 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 303 transitions. [2018-09-23 21:22:45,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:22:45,876 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 303 transitions. [2018-09-23 21:22:45,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-09-23 21:22:45,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:45,877 INFO L375 BasicCegarLoop]: trace histogram [230, 23, 23, 1, 1, 1] [2018-09-23 21:22:45,877 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:45,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:45,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1785473449, now seen corresponding path program 26 times [2018-09-23 21:22:45,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:45,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:45,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:45,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:45,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-09-23 21:22:47,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:47,568 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 [2018-09-23 21:22:47,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:47,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:47,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:47,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-09-23 21:22:47,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:47,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:22:47,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:22:47,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:22:47,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:22:47,820 INFO L87 Difference]: Start difference. First operand 280 states and 303 transitions. Second operand 26 states. [2018-09-23 21:22:48,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:48,104 INFO L93 Difference]: Finished difference Result 305 states and 330 transitions. [2018-09-23 21:22:48,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:22:48,105 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 279 [2018-09-23 21:22:48,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:48,107 INFO L225 Difference]: With dead ends: 305 [2018-09-23 21:22:48,107 INFO L226 Difference]: Without dead ends: 303 [2018-09-23 21:22:48,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:22:48,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-23 21:22:48,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 292. [2018-09-23 21:22:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-09-23 21:22:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 316 transitions. [2018-09-23 21:22:48,184 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 316 transitions. Word has length 279 [2018-09-23 21:22:48,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:48,184 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 316 transitions. [2018-09-23 21:22:48,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:22:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 316 transitions. [2018-09-23 21:22:48,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-09-23 21:22:48,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:48,185 INFO L375 BasicCegarLoop]: trace histogram [240, 24, 24, 1, 1, 1] [2018-09-23 21:22:48,186 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:48,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:48,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1795504115, now seen corresponding path program 27 times [2018-09-23 21:22:48,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:48,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:48,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:48,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:48,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-23 21:22:49,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:49,852 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 [2018-09-23 21:22:49,861 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:50,612 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 145 check-sat command(s) [2018-09-23 21:22:50,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:50,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-23 21:22:50,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:50,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 21:22:50,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:22:50,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:22:50,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:22:50,737 INFO L87 Difference]: Start difference. First operand 292 states and 316 transitions. Second operand 27 states. [2018-09-23 21:22:51,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:51,038 INFO L93 Difference]: Finished difference Result 317 states and 343 transitions. [2018-09-23 21:22:51,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:22:51,040 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 291 [2018-09-23 21:22:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:51,042 INFO L225 Difference]: With dead ends: 317 [2018-09-23 21:22:51,043 INFO L226 Difference]: Without dead ends: 315 [2018-09-23 21:22:51,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:22:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-23 21:22:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 304. [2018-09-23 21:22:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-09-23 21:22:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 329 transitions. [2018-09-23 21:22:51,155 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 329 transitions. Word has length 291 [2018-09-23 21:22:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:51,156 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 329 transitions. [2018-09-23 21:22:51,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:22:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 329 transitions. [2018-09-23 21:22:51,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-09-23 21:22:51,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:51,158 INFO L375 BasicCegarLoop]: trace histogram [250, 25, 25, 1, 1, 1] [2018-09-23 21:22:51,159 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:51,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:51,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1784227645, now seen corresponding path program 28 times [2018-09-23 21:22:51,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:51,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:51,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:51,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-09-23 21:22:52,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:52,297 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 [2018-09-23 21:22:52,308 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:52,498 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:52,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:52,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-09-23 21:22:52,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:52,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:22:52,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:22:52,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:22:52,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:22:52,638 INFO L87 Difference]: Start difference. First operand 304 states and 329 transitions. Second operand 28 states. [2018-09-23 21:22:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:52,881 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2018-09-23 21:22:52,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:22:52,881 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 303 [2018-09-23 21:22:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:52,883 INFO L225 Difference]: With dead ends: 329 [2018-09-23 21:22:52,883 INFO L226 Difference]: Without dead ends: 327 [2018-09-23 21:22:52,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:22:52,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-23 21:22:52,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 316. [2018-09-23 21:22:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-09-23 21:22:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 342 transitions. [2018-09-23 21:22:52,982 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 342 transitions. Word has length 303 [2018-09-23 21:22:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:52,983 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 342 transitions. [2018-09-23 21:22:52,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:22:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 342 transitions. [2018-09-23 21:22:52,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-09-23 21:22:52,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:52,985 INFO L375 BasicCegarLoop]: trace histogram [260, 26, 26, 1, 1, 1] [2018-09-23 21:22:52,985 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:52,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:52,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1243510663, now seen corresponding path program 29 times [2018-09-23 21:22:52,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:52,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:52,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:52,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-23 21:22:53,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:53,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:53,778 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:54,192 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 157 check-sat command(s) [2018-09-23 21:22:54,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:54,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-23 21:22:54,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:54,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:22:54,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:22:54,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:22:54,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:22:54,299 INFO L87 Difference]: Start difference. First operand 316 states and 342 transitions. Second operand 29 states. [2018-09-23 21:22:54,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:54,537 INFO L93 Difference]: Finished difference Result 341 states and 369 transitions. [2018-09-23 21:22:54,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:22:54,537 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 315 [2018-09-23 21:22:54,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:54,539 INFO L225 Difference]: With dead ends: 341 [2018-09-23 21:22:54,539 INFO L226 Difference]: Without dead ends: 339 [2018-09-23 21:22:54,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:22:54,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-23 21:22:54,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-09-23 21:22:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-23 21:22:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 355 transitions. [2018-09-23 21:22:54,650 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 355 transitions. Word has length 315 [2018-09-23 21:22:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:54,650 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 355 transitions. [2018-09-23 21:22:54,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:22:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 355 transitions. [2018-09-23 21:22:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-09-23 21:22:54,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:54,652 INFO L375 BasicCegarLoop]: trace histogram [270, 27, 27, 1, 1, 1] [2018-09-23 21:22:54,652 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:54,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:54,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1907644207, now seen corresponding path program 30 times [2018-09-23 21:22:54,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:54,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:54,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:54,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:54,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-09-23 21:22:55,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:55,851 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 [2018-09-23 21:22:55,860 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:56,325 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 158 check-sat command(s) [2018-09-23 21:22:56,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:56,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-09-23 21:22:56,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:56,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:22:56,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:22:56,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:22:56,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:22:56,517 INFO L87 Difference]: Start difference. First operand 328 states and 355 transitions. Second operand 30 states. [2018-09-23 21:22:56,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:56,814 INFO L93 Difference]: Finished difference Result 353 states and 382 transitions. [2018-09-23 21:22:56,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:22:56,814 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 327 [2018-09-23 21:22:56,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:56,816 INFO L225 Difference]: With dead ends: 353 [2018-09-23 21:22:56,816 INFO L226 Difference]: Without dead ends: 351 [2018-09-23 21:22:56,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:22:56,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-23 21:22:56,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 340. [2018-09-23 21:22:56,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-09-23 21:22:56,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 368 transitions. [2018-09-23 21:22:56,966 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 368 transitions. Word has length 327 [2018-09-23 21:22:56,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:56,967 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 368 transitions. [2018-09-23 21:22:56,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:22:56,967 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 368 transitions. [2018-09-23 21:22:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-09-23 21:22:56,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:56,970 INFO L375 BasicCegarLoop]: trace histogram [280, 28, 28, 1, 1, 1] [2018-09-23 21:22:56,970 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:56,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:56,970 INFO L82 PathProgramCache]: Analyzing trace with hash -48809189, now seen corresponding path program 31 times [2018-09-23 21:22:56,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:56,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:56,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:56,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-23 21:22:57,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:57,878 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 [2018-09-23 21:22:57,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:58,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-23 21:22:58,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:58,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:22:58,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:22:58,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:22:58,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:22:58,220 INFO L87 Difference]: Start difference. First operand 340 states and 368 transitions. Second operand 31 states. [2018-09-23 21:22:59,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:59,089 INFO L93 Difference]: Finished difference Result 365 states and 395 transitions. [2018-09-23 21:22:59,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:22:59,089 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 339 [2018-09-23 21:22:59,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:59,091 INFO L225 Difference]: With dead ends: 365 [2018-09-23 21:22:59,091 INFO L226 Difference]: Without dead ends: 363 [2018-09-23 21:22:59,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:22:59,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-23 21:22:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2018-09-23 21:22:59,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-09-23 21:22:59,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 381 transitions. [2018-09-23 21:22:59,213 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 381 transitions. Word has length 339 [2018-09-23 21:22:59,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:59,213 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 381 transitions. [2018-09-23 21:22:59,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:22:59,214 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 381 transitions. [2018-09-23 21:22:59,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-09-23 21:22:59,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:59,216 INFO L375 BasicCegarLoop]: trace histogram [290, 29, 29, 1, 1, 1] [2018-09-23 21:22:59,216 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:59,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:59,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1056419429, now seen corresponding path program 32 times [2018-09-23 21:22:59,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:59,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:59,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:59,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:59,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-09-23 21:22:59,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:59,908 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 [2018-09-23 21:22:59,915 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:00,131 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:00,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:00,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-09-23 21:23:00,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:00,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:23:00,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:23:00,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:23:00,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:23:00,252 INFO L87 Difference]: Start difference. First operand 352 states and 381 transitions. Second operand 32 states. [2018-09-23 21:23:00,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:00,510 INFO L93 Difference]: Finished difference Result 377 states and 408 transitions. [2018-09-23 21:23:00,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:23:00,510 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 351 [2018-09-23 21:23:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:00,512 INFO L225 Difference]: With dead ends: 377 [2018-09-23 21:23:00,512 INFO L226 Difference]: Without dead ends: 375 [2018-09-23 21:23:00,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:23:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-09-23 21:23:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2018-09-23 21:23:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-09-23 21:23:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 394 transitions. [2018-09-23 21:23:00,621 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 394 transitions. Word has length 351 [2018-09-23 21:23:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:00,622 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 394 transitions. [2018-09-23 21:23:00,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:23:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 394 transitions. [2018-09-23 21:23:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-09-23 21:23:00,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:00,624 INFO L375 BasicCegarLoop]: trace histogram [300, 30, 30, 1, 1, 1] [2018-09-23 21:23:00,624 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:00,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:00,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2124645039, now seen corresponding path program 33 times [2018-09-23 21:23:00,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:00,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:00,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:00,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:00,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-23 21:23:01,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:01,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:01,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:02,132 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 181 check-sat command(s) [2018-09-23 21:23:02,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:02,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-23 21:23:02,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:02,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 21:23:02,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:23:02,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:23:02,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:23:02,320 INFO L87 Difference]: Start difference. First operand 364 states and 394 transitions. Second operand 33 states. [2018-09-23 21:23:02,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:02,690 INFO L93 Difference]: Finished difference Result 389 states and 421 transitions. [2018-09-23 21:23:02,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:23:02,690 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 363 [2018-09-23 21:23:02,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:02,692 INFO L225 Difference]: With dead ends: 389 [2018-09-23 21:23:02,693 INFO L226 Difference]: Without dead ends: 387 [2018-09-23 21:23:02,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:23:02,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-09-23 21:23:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 376. [2018-09-23 21:23:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-09-23 21:23:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2018-09-23 21:23:02,818 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 363 [2018-09-23 21:23:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:02,819 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2018-09-23 21:23:02,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:23:02,819 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2018-09-23 21:23:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-09-23 21:23:02,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:02,821 INFO L375 BasicCegarLoop]: trace histogram [310, 31, 31, 1, 1, 1] [2018-09-23 21:23:02,821 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:02,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:02,821 INFO L82 PathProgramCache]: Analyzing trace with hash 152123385, now seen corresponding path program 34 times [2018-09-23 21:23:02,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:02,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:02,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:02,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:02,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-09-23 21:23:03,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:03,583 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 [2018-09-23 21:23:03,590 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:03,797 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:03,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:03,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-09-23 21:23:04,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:04,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:23:04,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:23:04,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:23:04,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:23:04,005 INFO L87 Difference]: Start difference. First operand 376 states and 407 transitions. Second operand 34 states. [2018-09-23 21:23:04,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:04,649 INFO L93 Difference]: Finished difference Result 401 states and 434 transitions. [2018-09-23 21:23:04,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:23:04,649 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 375 [2018-09-23 21:23:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:04,651 INFO L225 Difference]: With dead ends: 401 [2018-09-23 21:23:04,652 INFO L226 Difference]: Without dead ends: 399 [2018-09-23 21:23:04,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:23:04,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-09-23 21:23:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 388. [2018-09-23 21:23:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-09-23 21:23:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 420 transitions. [2018-09-23 21:23:04,788 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 420 transitions. Word has length 375 [2018-09-23 21:23:04,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:04,789 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 420 transitions. [2018-09-23 21:23:04,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:23:04,789 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 420 transitions. [2018-09-23 21:23:04,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-09-23 21:23:04,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:04,791 INFO L375 BasicCegarLoop]: trace histogram [320, 32, 32, 1, 1, 1] [2018-09-23 21:23:04,791 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:04,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:04,791 INFO L82 PathProgramCache]: Analyzing trace with hash -310948285, now seen corresponding path program 35 times [2018-09-23 21:23:04,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:04,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:04,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:04,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:04,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-23 21:23:05,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:05,618 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 [2018-09-23 21:23:05,627 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:06,264 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 193 check-sat command(s) [2018-09-23 21:23:06,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:06,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-23 21:23:06,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:06,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:23:06,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:23:06,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:23:06,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:23:06,400 INFO L87 Difference]: Start difference. First operand 388 states and 420 transitions. Second operand 35 states. [2018-09-23 21:23:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:06,690 INFO L93 Difference]: Finished difference Result 413 states and 447 transitions. [2018-09-23 21:23:06,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:23:06,690 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 387 [2018-09-23 21:23:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:06,692 INFO L225 Difference]: With dead ends: 413 [2018-09-23 21:23:06,692 INFO L226 Difference]: Without dead ends: 411 [2018-09-23 21:23:06,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:23:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-09-23 21:23:06,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 400. [2018-09-23 21:23:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-09-23 21:23:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 433 transitions. [2018-09-23 21:23:06,835 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 433 transitions. Word has length 387 [2018-09-23 21:23:06,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:06,835 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 433 transitions. [2018-09-23 21:23:06,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:23:06,835 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 433 transitions. [2018-09-23 21:23:06,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-09-23 21:23:06,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:06,838 INFO L375 BasicCegarLoop]: trace histogram [330, 33, 33, 1, 1, 1] [2018-09-23 21:23:06,838 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:06,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:06,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1655945843, now seen corresponding path program 36 times [2018-09-23 21:23:06,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:06,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:06,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:06,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:06,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-09-23 21:23:07,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:07,943 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 [2018-09-23 21:23:07,952 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:08,728 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 195 check-sat command(s) [2018-09-23 21:23:08,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:08,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-09-23 21:23:08,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:08,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:23:08,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:23:08,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:23:08,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:23:08,892 INFO L87 Difference]: Start difference. First operand 400 states and 433 transitions. Second operand 36 states. [2018-09-23 21:23:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:09,270 INFO L93 Difference]: Finished difference Result 425 states and 460 transitions. [2018-09-23 21:23:09,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:23:09,271 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 399 [2018-09-23 21:23:09,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:09,273 INFO L225 Difference]: With dead ends: 425 [2018-09-23 21:23:09,273 INFO L226 Difference]: Without dead ends: 423 [2018-09-23 21:23:09,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:23:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-09-23 21:23:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2018-09-23 21:23:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-09-23 21:23:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2018-09-23 21:23:09,422 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 399 [2018-09-23 21:23:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:09,422 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2018-09-23 21:23:09,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:23:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2018-09-23 21:23:09,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-09-23 21:23:09,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:09,424 INFO L375 BasicCegarLoop]: trace histogram [340, 34, 34, 1, 1, 1] [2018-09-23 21:23:09,425 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:09,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:09,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1941529129, now seen corresponding path program 37 times [2018-09-23 21:23:09,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:09,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:09,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:09,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:09,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-09-23 21:23:10,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:10,239 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 [2018-09-23 21:23:10,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:10,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-09-23 21:23:10,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:10,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:23:10,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:23:10,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:23:10,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:23:10,668 INFO L87 Difference]: Start difference. First operand 412 states and 446 transitions. Second operand 37 states. [2018-09-23 21:23:11,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:11,028 INFO L93 Difference]: Finished difference Result 437 states and 473 transitions. [2018-09-23 21:23:11,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:23:11,029 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 411 [2018-09-23 21:23:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:11,030 INFO L225 Difference]: With dead ends: 437 [2018-09-23 21:23:11,030 INFO L226 Difference]: Without dead ends: 435 [2018-09-23 21:23:11,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:23:11,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-09-23 21:23:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 424. [2018-09-23 21:23:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-09-23 21:23:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 459 transitions. [2018-09-23 21:23:11,204 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 459 transitions. Word has length 411 [2018-09-23 21:23:11,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:11,204 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 459 transitions. [2018-09-23 21:23:11,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:23:11,205 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 459 transitions. [2018-09-23 21:23:11,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-09-23 21:23:11,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:11,207 INFO L375 BasicCegarLoop]: trace histogram [350, 35, 35, 1, 1, 1] [2018-09-23 21:23:11,207 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:11,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:11,208 INFO L82 PathProgramCache]: Analyzing trace with hash -799221983, now seen corresponding path program 38 times [2018-09-23 21:23:11,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:11,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:11,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:11,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:11,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-09-23 21:23:12,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:12,204 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 [2018-09-23 21:23:12,212 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:12,441 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:12,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:12,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-09-23 21:23:12,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:12,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:23:12,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:23:12,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:23:12,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:23:12,662 INFO L87 Difference]: Start difference. First operand 424 states and 459 transitions. Second operand 38 states. [2018-09-23 21:23:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:13,274 INFO L93 Difference]: Finished difference Result 449 states and 486 transitions. [2018-09-23 21:23:13,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:23:13,274 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 423 [2018-09-23 21:23:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:13,276 INFO L225 Difference]: With dead ends: 449 [2018-09-23 21:23:13,276 INFO L226 Difference]: Without dead ends: 447 [2018-09-23 21:23:13,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:23:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-09-23 21:23:13,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 436. [2018-09-23 21:23:13,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-09-23 21:23:13,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 472 transitions. [2018-09-23 21:23:13,439 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 472 transitions. Word has length 423 [2018-09-23 21:23:13,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:13,439 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 472 transitions. [2018-09-23 21:23:13,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:23:13,439 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 472 transitions. [2018-09-23 21:23:13,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-09-23 21:23:13,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:13,442 INFO L375 BasicCegarLoop]: trace histogram [360, 36, 36, 1, 1, 1] [2018-09-23 21:23:13,442 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:13,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:13,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1044024981, now seen corresponding path program 39 times [2018-09-23 21:23:13,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:13,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:13,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:13,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:13,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-23 21:23:14,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:14,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:14,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:15,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 217 check-sat command(s) [2018-09-23 21:23:15,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:15,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-23 21:23:15,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:15,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 21:23:15,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:23:15,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:23:15,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:23:15,383 INFO L87 Difference]: Start difference. First operand 436 states and 472 transitions. Second operand 39 states. [2018-09-23 21:23:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:15,763 INFO L93 Difference]: Finished difference Result 461 states and 499 transitions. [2018-09-23 21:23:15,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:23:15,763 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 435 [2018-09-23 21:23:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:15,765 INFO L225 Difference]: With dead ends: 461 [2018-09-23 21:23:15,765 INFO L226 Difference]: Without dead ends: 459 [2018-09-23 21:23:15,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:23:15,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-09-23 21:23:15,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 448. [2018-09-23 21:23:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-09-23 21:23:15,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 485 transitions. [2018-09-23 21:23:15,930 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 485 transitions. Word has length 435 [2018-09-23 21:23:15,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:15,930 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 485 transitions. [2018-09-23 21:23:15,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:23:15,930 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 485 transitions. [2018-09-23 21:23:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-09-23 21:23:15,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:15,932 INFO L375 BasicCegarLoop]: trace histogram [370, 37, 37, 1, 1, 1] [2018-09-23 21:23:15,932 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:15,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:15,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1695093579, now seen corresponding path program 40 times [2018-09-23 21:23:15,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:15,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:15,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:15,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:15,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-09-23 21:23:17,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:17,182 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 [2018-09-23 21:23:17,189 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:17,436 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:17,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:17,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-09-23 21:23:17,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:17,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:23:17,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:23:17,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:23:17,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:23:17,689 INFO L87 Difference]: Start difference. First operand 448 states and 485 transitions. Second operand 40 states. [2018-09-23 21:23:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:18,112 INFO L93 Difference]: Finished difference Result 473 states and 512 transitions. [2018-09-23 21:23:18,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:23:18,118 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 447 [2018-09-23 21:23:18,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:18,119 INFO L225 Difference]: With dead ends: 473 [2018-09-23 21:23:18,119 INFO L226 Difference]: Without dead ends: 471 [2018-09-23 21:23:18,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:23:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-09-23 21:23:18,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 460. [2018-09-23 21:23:18,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-09-23 21:23:18,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 498 transitions. [2018-09-23 21:23:18,310 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 498 transitions. Word has length 447 [2018-09-23 21:23:18,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:18,310 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 498 transitions. [2018-09-23 21:23:18,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:23:18,310 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 498 transitions. [2018-09-23 21:23:18,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-09-23 21:23:18,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:18,313 INFO L375 BasicCegarLoop]: trace histogram [380, 38, 38, 1, 1, 1] [2018-09-23 21:23:18,313 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:18,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:18,313 INFO L82 PathProgramCache]: Analyzing trace with hash 413649151, now seen corresponding path program 41 times [2018-09-23 21:23:18,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:18,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:18,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:18,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:18,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-09-23 21:23:19,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:19,346 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 [2018-09-23 21:23:19,353 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:20,165 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 229 check-sat command(s) [2018-09-23 21:23:20,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:20,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-09-23 21:23:20,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:20,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:23:20,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:23:20,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:23:20,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:23:20,339 INFO L87 Difference]: Start difference. First operand 460 states and 498 transitions. Second operand 41 states. [2018-09-23 21:23:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:20,933 INFO L93 Difference]: Finished difference Result 485 states and 525 transitions. [2018-09-23 21:23:20,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:23:20,934 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 459 [2018-09-23 21:23:20,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:20,935 INFO L225 Difference]: With dead ends: 485 [2018-09-23 21:23:20,936 INFO L226 Difference]: Without dead ends: 483 [2018-09-23 21:23:20,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:23:20,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-09-23 21:23:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 472. [2018-09-23 21:23:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2018-09-23 21:23:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 511 transitions. [2018-09-23 21:23:21,113 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 511 transitions. Word has length 459 [2018-09-23 21:23:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:21,113 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 511 transitions. [2018-09-23 21:23:21,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:23:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 511 transitions. [2018-09-23 21:23:21,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2018-09-23 21:23:21,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:21,115 INFO L375 BasicCegarLoop]: trace histogram [390, 39, 39, 1, 1, 1] [2018-09-23 21:23:21,115 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:21,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:21,116 INFO L82 PathProgramCache]: Analyzing trace with hash 432965193, now seen corresponding path program 42 times [2018-09-23 21:23:21,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:21,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:21,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:21,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:21,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-09-23 21:23:22,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:22,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:22,159 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:23,023 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 230 check-sat command(s) [2018-09-23 21:23:23,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:23,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-09-23 21:23:23,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:23,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:23:23,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:23:23,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:23:23,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:23:23,204 INFO L87 Difference]: Start difference. First operand 472 states and 511 transitions. Second operand 42 states. [2018-09-23 21:23:23,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:23,604 INFO L93 Difference]: Finished difference Result 497 states and 538 transitions. [2018-09-23 21:23:23,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:23:23,604 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 471 [2018-09-23 21:23:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:23,606 INFO L225 Difference]: With dead ends: 497 [2018-09-23 21:23:23,606 INFO L226 Difference]: Without dead ends: 495 [2018-09-23 21:23:23,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:23:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-09-23 21:23:23,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 484. [2018-09-23 21:23:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-09-23 21:23:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 524 transitions. [2018-09-23 21:23:23,821 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 524 transitions. Word has length 471 [2018-09-23 21:23:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:23,821 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 524 transitions. [2018-09-23 21:23:23,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:23:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 524 transitions. [2018-09-23 21:23:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-09-23 21:23:23,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:23,824 INFO L375 BasicCegarLoop]: trace histogram [400, 40, 40, 1, 1, 1] [2018-09-23 21:23:23,824 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:23,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:23,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1067558035, now seen corresponding path program 43 times [2018-09-23 21:23:23,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:23,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:23,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:23,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:23,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-09-23 21:23:24,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:24,805 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 [2018-09-23 21:23:24,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:25,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-09-23 21:23:25,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:25,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 21:23:25,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:23:25,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:23:25,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:23:25,364 INFO L87 Difference]: Start difference. First operand 484 states and 524 transitions. Second operand 43 states. [2018-09-23 21:23:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:25,789 INFO L93 Difference]: Finished difference Result 509 states and 551 transitions. [2018-09-23 21:23:25,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:23:25,789 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 483 [2018-09-23 21:23:25,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:25,791 INFO L225 Difference]: With dead ends: 509 [2018-09-23 21:23:25,791 INFO L226 Difference]: Without dead ends: 507 [2018-09-23 21:23:25,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:23:25,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2018-09-23 21:23:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2018-09-23 21:23:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2018-09-23 21:23:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 537 transitions. [2018-09-23 21:23:25,998 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 537 transitions. Word has length 483 [2018-09-23 21:23:25,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:25,998 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 537 transitions. [2018-09-23 21:23:25,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:23:25,998 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 537 transitions. [2018-09-23 21:23:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-09-23 21:23:26,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:26,000 INFO L375 BasicCegarLoop]: trace histogram [410, 41, 41, 1, 1, 1] [2018-09-23 21:23:26,001 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:26,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:26,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1919441955, now seen corresponding path program 44 times [2018-09-23 21:23:26,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:26,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:26,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:26,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:26,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-09-23 21:23:26,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:26,945 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 [2018-09-23 21:23:26,952 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:27,212 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:27,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:27,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-09-23 21:23:27,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:27,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:23:27,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:23:27,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:23:27,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:23:27,400 INFO L87 Difference]: Start difference. First operand 496 states and 537 transitions. Second operand 44 states. [2018-09-23 21:23:27,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:27,861 INFO L93 Difference]: Finished difference Result 521 states and 564 transitions. [2018-09-23 21:23:27,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:23:27,861 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 495 [2018-09-23 21:23:27,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:27,863 INFO L225 Difference]: With dead ends: 521 [2018-09-23 21:23:27,863 INFO L226 Difference]: Without dead ends: 519 [2018-09-23 21:23:27,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:23:27,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2018-09-23 21:23:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2018-09-23 21:23:28,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-09-23 21:23:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 550 transitions. [2018-09-23 21:23:28,089 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 550 transitions. Word has length 495 [2018-09-23 21:23:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:28,089 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 550 transitions. [2018-09-23 21:23:28,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:23:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 550 transitions. [2018-09-23 21:23:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-09-23 21:23:28,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:28,091 INFO L375 BasicCegarLoop]: trace histogram [420, 42, 42, 1, 1, 1] [2018-09-23 21:23:28,092 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:28,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:28,092 INFO L82 PathProgramCache]: Analyzing trace with hash 157746215, now seen corresponding path program 45 times [2018-09-23 21:23:28,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:28,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:28,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:28,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:28,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-09-23 21:23:29,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:29,154 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 [2018-09-23 21:23:29,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:30,403 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 253 check-sat command(s) [2018-09-23 21:23:30,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:30,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-09-23 21:23:30,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:30,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 21:23:30,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:23:30,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:23:30,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:23:30,614 INFO L87 Difference]: Start difference. First operand 508 states and 550 transitions. Second operand 45 states. [2018-09-23 21:23:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:31,862 INFO L93 Difference]: Finished difference Result 533 states and 577 transitions. [2018-09-23 21:23:31,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:23:31,867 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 507 [2018-09-23 21:23:31,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:31,869 INFO L225 Difference]: With dead ends: 533 [2018-09-23 21:23:31,869 INFO L226 Difference]: Without dead ends: 531 [2018-09-23 21:23:31,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:23:31,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-09-23 21:23:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 520. [2018-09-23 21:23:32,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-09-23 21:23:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 563 transitions. [2018-09-23 21:23:32,126 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 563 transitions. Word has length 507 [2018-09-23 21:23:32,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:32,126 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 563 transitions. [2018-09-23 21:23:32,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:23:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 563 transitions. [2018-09-23 21:23:32,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-09-23 21:23:32,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:32,129 INFO L375 BasicCegarLoop]: trace histogram [430, 43, 43, 1, 1, 1] [2018-09-23 21:23:32,129 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:32,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:32,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1527137649, now seen corresponding path program 46 times [2018-09-23 21:23:32,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:32,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:32,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:32,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:32,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-09-23 21:23:33,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:33,551 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) [2018-09-23 21:23:33,583 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:33,873 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:33,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:33,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-09-23 21:23:34,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:34,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:23:34,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:23:34,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:23:34,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:23:34,082 INFO L87 Difference]: Start difference. First operand 520 states and 563 transitions. Second operand 46 states. [2018-09-23 21:23:34,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:34,668 INFO L93 Difference]: Finished difference Result 545 states and 590 transitions. [2018-09-23 21:23:34,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:23:34,670 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 519 [2018-09-23 21:23:34,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:34,672 INFO L225 Difference]: With dead ends: 545 [2018-09-23 21:23:34,672 INFO L226 Difference]: Without dead ends: 543 [2018-09-23 21:23:34,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:23:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-09-23 21:23:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 532. [2018-09-23 21:23:34,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-09-23 21:23:34,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 576 transitions. [2018-09-23 21:23:34,971 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 576 transitions. Word has length 519 [2018-09-23 21:23:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:34,971 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 576 transitions. [2018-09-23 21:23:34,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:23:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 576 transitions. [2018-09-23 21:23:34,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-09-23 21:23:34,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:34,974 INFO L375 BasicCegarLoop]: trace histogram [440, 44, 44, 1, 1, 1] [2018-09-23 21:23:34,974 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:34,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:34,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1823205307, now seen corresponding path program 47 times [2018-09-23 21:23:34,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:34,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:34,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:34,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:34,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-09-23 21:23:36,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:36,035 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 [2018-09-23 21:23:36,042 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:37,152 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 265 check-sat command(s) [2018-09-23 21:23:37,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:37,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-09-23 21:23:37,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:37,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:23:37,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:23:37,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:23:37,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:23:37,410 INFO L87 Difference]: Start difference. First operand 532 states and 576 transitions. Second operand 47 states. [2018-09-23 21:23:38,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:38,011 INFO L93 Difference]: Finished difference Result 557 states and 603 transitions. [2018-09-23 21:23:38,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:23:38,018 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 531 [2018-09-23 21:23:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:38,020 INFO L225 Difference]: With dead ends: 557 [2018-09-23 21:23:38,020 INFO L226 Difference]: Without dead ends: 555 [2018-09-23 21:23:38,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:23:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-09-23 21:23:38,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2018-09-23 21:23:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2018-09-23 21:23:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 589 transitions. [2018-09-23 21:23:38,305 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 589 transitions. Word has length 531 [2018-09-23 21:23:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:38,305 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 589 transitions. [2018-09-23 21:23:38,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:23:38,305 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 589 transitions. [2018-09-23 21:23:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-09-23 21:23:38,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:38,308 INFO L375 BasicCegarLoop]: trace histogram [450, 45, 45, 1, 1, 1] [2018-09-23 21:23:38,308 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:38,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:38,308 INFO L82 PathProgramCache]: Analyzing trace with hash 181299973, now seen corresponding path program 48 times [2018-09-23 21:23:38,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:38,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:38,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:38,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:38,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-09-23 21:23:39,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:39,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:39,437 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:40,616 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 267 check-sat command(s) [2018-09-23 21:23:40,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:40,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-09-23 21:23:40,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:40,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:23:40,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:23:40,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:23:40,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:23:40,850 INFO L87 Difference]: Start difference. First operand 544 states and 589 transitions. Second operand 48 states. [2018-09-23 21:23:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:41,449 INFO L93 Difference]: Finished difference Result 569 states and 616 transitions. [2018-09-23 21:23:41,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:23:41,449 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 543 [2018-09-23 21:23:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:41,451 INFO L225 Difference]: With dead ends: 569 [2018-09-23 21:23:41,451 INFO L226 Difference]: Without dead ends: 567 [2018-09-23 21:23:41,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:23:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2018-09-23 21:23:41,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 556. [2018-09-23 21:23:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-09-23 21:23:41,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 602 transitions. [2018-09-23 21:23:41,723 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 602 transitions. Word has length 543 [2018-09-23 21:23:41,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:41,723 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 602 transitions. [2018-09-23 21:23:41,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:23:41,723 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 602 transitions. [2018-09-23 21:23:41,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-09-23 21:23:41,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:41,726 INFO L375 BasicCegarLoop]: trace histogram [460, 46, 46, 1, 1, 1] [2018-09-23 21:23:41,726 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:41,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:41,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2077995185, now seen corresponding path program 49 times [2018-09-23 21:23:41,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:41,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:41,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:41,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:41,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-09-23 21:23:43,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:43,130 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 [2018-09-23 21:23:43,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:43,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-09-23 21:23:43,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:43,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 21:23:43,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:23:43,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:23:43,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:23:43,680 INFO L87 Difference]: Start difference. First operand 556 states and 602 transitions. Second operand 49 states. [2018-09-23 21:23:44,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:44,248 INFO L93 Difference]: Finished difference Result 581 states and 629 transitions. [2018-09-23 21:23:44,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:23:44,248 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 555 [2018-09-23 21:23:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:44,251 INFO L225 Difference]: With dead ends: 581 [2018-09-23 21:23:44,251 INFO L226 Difference]: Without dead ends: 579 [2018-09-23 21:23:44,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:23:44,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2018-09-23 21:23:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 568. [2018-09-23 21:23:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2018-09-23 21:23:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 615 transitions. [2018-09-23 21:23:44,529 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 615 transitions. Word has length 555 [2018-09-23 21:23:44,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:44,529 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 615 transitions. [2018-09-23 21:23:44,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:23:44,530 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 615 transitions. [2018-09-23 21:23:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-09-23 21:23:44,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:44,533 INFO L375 BasicCegarLoop]: trace histogram [470, 47, 47, 1, 1, 1] [2018-09-23 21:23:44,533 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:44,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:44,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1235489945, now seen corresponding path program 50 times [2018-09-23 21:23:44,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:44,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:44,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:44,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:44,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-09-23 21:23:45,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:45,769 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 [2018-09-23 21:23:45,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:46,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:46,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:46,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-09-23 21:23:46,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:46,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:23:46,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:23:46,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:23:46,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:23:46,342 INFO L87 Difference]: Start difference. First operand 568 states and 615 transitions. Second operand 50 states. [2018-09-23 21:23:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:46,961 INFO L93 Difference]: Finished difference Result 593 states and 642 transitions. [2018-09-23 21:23:46,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:23:46,962 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 567 [2018-09-23 21:23:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:46,964 INFO L225 Difference]: With dead ends: 593 [2018-09-23 21:23:46,964 INFO L226 Difference]: Without dead ends: 591 [2018-09-23 21:23:46,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:23:46,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-09-23 21:23:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 580. [2018-09-23 21:23:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2018-09-23 21:23:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 628 transitions. [2018-09-23 21:23:47,279 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 628 transitions. Word has length 567 [2018-09-23 21:23:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:47,280 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 628 transitions. [2018-09-23 21:23:47,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:23:47,280 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 628 transitions. [2018-09-23 21:23:47,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2018-09-23 21:23:47,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:47,282 INFO L375 BasicCegarLoop]: trace histogram [480, 48, 48, 1, 1, 1] [2018-09-23 21:23:47,283 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:47,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:47,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1903936797, now seen corresponding path program 51 times [2018-09-23 21:23:47,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:47,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:47,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:47,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:47,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-09-23 21:23:48,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:48,867 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 [2018-09-23 21:23:48,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:50,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 289 check-sat command(s) [2018-09-23 21:23:50,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:50,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-09-23 21:23:50,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:50,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 21:23:50,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:23:50,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:23:50,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:23:50,555 INFO L87 Difference]: Start difference. First operand 580 states and 628 transitions. Second operand 51 states. [2018-09-23 21:23:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:51,189 INFO L93 Difference]: Finished difference Result 605 states and 655 transitions. [2018-09-23 21:23:51,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:23:51,189 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 579 [2018-09-23 21:23:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:51,191 INFO L225 Difference]: With dead ends: 605 [2018-09-23 21:23:51,192 INFO L226 Difference]: Without dead ends: 603 [2018-09-23 21:23:51,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:23:51,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-09-23 21:23:51,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 592. [2018-09-23 21:23:51,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2018-09-23 21:23:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 641 transitions. [2018-09-23 21:23:51,495 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 641 transitions. Word has length 579 [2018-09-23 21:23:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:51,495 INFO L480 AbstractCegarLoop]: Abstraction has 592 states and 641 transitions. [2018-09-23 21:23:51,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:23:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 641 transitions. [2018-09-23 21:23:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2018-09-23 21:23:51,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:51,498 INFO L375 BasicCegarLoop]: trace histogram [490, 49, 49, 1, 1, 1] [2018-09-23 21:23:51,498 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:51,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:51,498 INFO L82 PathProgramCache]: Analyzing trace with hash -398769619, now seen corresponding path program 52 times [2018-09-23 21:23:51,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:51,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:51,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:51,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:51,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-09-23 21:23:52,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:52,777 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 [2018-09-23 21:23:52,785 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:53,111 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:53,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:53,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-09-23 21:23:53,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:53,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:23:53,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:23:53,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:23:53,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:23:53,364 INFO L87 Difference]: Start difference. First operand 592 states and 641 transitions. Second operand 52 states. [2018-09-23 21:23:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:54,012 INFO L93 Difference]: Finished difference Result 617 states and 668 transitions. [2018-09-23 21:23:54,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:23:54,012 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 591 [2018-09-23 21:23:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:54,014 INFO L225 Difference]: With dead ends: 617 [2018-09-23 21:23:54,014 INFO L226 Difference]: Without dead ends: 615 [2018-09-23 21:23:54,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:23:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2018-09-23 21:23:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 604. [2018-09-23 21:23:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-09-23 21:23:54,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 654 transitions. [2018-09-23 21:23:54,392 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 654 transitions. Word has length 591 [2018-09-23 21:23:54,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:54,392 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 654 transitions. [2018-09-23 21:23:54,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:23:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 654 transitions. [2018-09-23 21:23:54,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2018-09-23 21:23:54,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:54,395 INFO L375 BasicCegarLoop]: trace histogram [500, 50, 50, 1, 1, 1] [2018-09-23 21:23:54,395 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:54,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:54,396 INFO L82 PathProgramCache]: Analyzing trace with hash -293623177, now seen corresponding path program 53 times [2018-09-23 21:23:54,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:54,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:54,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:54,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:54,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-09-23 21:23:55,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:55,725 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 [2018-09-23 21:23:55,733 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:57,194 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 301 check-sat command(s) [2018-09-23 21:23:57,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:57,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-09-23 21:23:57,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:57,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:23:57,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:23:57,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:23:57,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:23:57,456 INFO L87 Difference]: Start difference. First operand 604 states and 654 transitions. Second operand 53 states. [2018-09-23 21:23:58,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:58,115 INFO L93 Difference]: Finished difference Result 629 states and 681 transitions. [2018-09-23 21:23:58,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:23:58,115 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 603 [2018-09-23 21:23:58,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:58,117 INFO L225 Difference]: With dead ends: 629 [2018-09-23 21:23:58,117 INFO L226 Difference]: Without dead ends: 627 [2018-09-23 21:23:58,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:23:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-09-23 21:23:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 616. [2018-09-23 21:23:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2018-09-23 21:23:58,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 667 transitions. [2018-09-23 21:23:58,479 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 667 transitions. Word has length 603 [2018-09-23 21:23:58,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:58,480 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 667 transitions. [2018-09-23 21:23:58,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:23:58,480 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 667 transitions. [2018-09-23 21:23:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-09-23 21:23:58,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:58,483 INFO L375 BasicCegarLoop]: trace histogram [510, 51, 51, 1, 1, 1] [2018-09-23 21:23:58,483 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:58,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:58,483 INFO L82 PathProgramCache]: Analyzing trace with hash -616041535, now seen corresponding path program 54 times [2018-09-23 21:23:58,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:58,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:58,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:58,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:58,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-09-23 21:24:00,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:00,269 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 [2018-09-23 21:24:00,276 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:01,665 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 302 check-sat command(s) [2018-09-23 21:24:01,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:01,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-09-23 21:24:02,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:02,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 21:24:02,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:24:02,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:24:02,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:24:02,048 INFO L87 Difference]: Start difference. First operand 616 states and 667 transitions. Second operand 54 states. [2018-09-23 21:24:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:02,724 INFO L93 Difference]: Finished difference Result 641 states and 694 transitions. [2018-09-23 21:24:02,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:24:02,724 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 615 [2018-09-23 21:24:02,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:02,727 INFO L225 Difference]: With dead ends: 641 [2018-09-23 21:24:02,727 INFO L226 Difference]: Without dead ends: 639 [2018-09-23 21:24:02,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:24:02,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-09-23 21:24:03,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 628. [2018-09-23 21:24:03,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2018-09-23 21:24:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 680 transitions. [2018-09-23 21:24:03,098 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 680 transitions. Word has length 615 [2018-09-23 21:24:03,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:03,098 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 680 transitions. [2018-09-23 21:24:03,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:24:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 680 transitions. [2018-09-23 21:24:03,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2018-09-23 21:24:03,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:03,101 INFO L375 BasicCegarLoop]: trace histogram [520, 52, 52, 1, 1, 1] [2018-09-23 21:24:03,102 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:03,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:03,102 INFO L82 PathProgramCache]: Analyzing trace with hash 717921803, now seen corresponding path program 55 times [2018-09-23 21:24:03,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:03,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:03,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:03,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:03,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-09-23 21:24:04,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:04,950 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 [2018-09-23 21:24:04,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:05,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-09-23 21:24:05,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:05,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 21:24:05,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:24:05,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:24:05,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:24:05,592 INFO L87 Difference]: Start difference. First operand 628 states and 680 transitions. Second operand 55 states. [2018-09-23 21:24:06,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:06,287 INFO L93 Difference]: Finished difference Result 653 states and 707 transitions. [2018-09-23 21:24:06,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:24:06,288 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 627 [2018-09-23 21:24:06,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:06,290 INFO L225 Difference]: With dead ends: 653 [2018-09-23 21:24:06,290 INFO L226 Difference]: Without dead ends: 651 [2018-09-23 21:24:06,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:24:06,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2018-09-23 21:24:06,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 640. [2018-09-23 21:24:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2018-09-23 21:24:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 693 transitions. [2018-09-23 21:24:06,654 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 693 transitions. Word has length 627 [2018-09-23 21:24:06,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:06,654 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 693 transitions. [2018-09-23 21:24:06,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:24:06,654 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 693 transitions. [2018-09-23 21:24:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-09-23 21:24:06,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:06,657 INFO L375 BasicCegarLoop]: trace histogram [530, 53, 53, 1, 1, 1] [2018-09-23 21:24:06,657 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:06,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:06,658 INFO L82 PathProgramCache]: Analyzing trace with hash 998123861, now seen corresponding path program 56 times [2018-09-23 21:24:06,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:06,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:06,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:06,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:06,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-09-23 21:24:08,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:08,128 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 [2018-09-23 21:24:08,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:08,485 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:08,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:08,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-09-23 21:24:08,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:08,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:24:08,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:24:08,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:24:08,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:24:08,865 INFO L87 Difference]: Start difference. First operand 640 states and 693 transitions. Second operand 56 states. [2018-09-23 21:24:09,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:09,649 INFO L93 Difference]: Finished difference Result 665 states and 720 transitions. [2018-09-23 21:24:09,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:24:09,649 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 639 [2018-09-23 21:24:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:09,651 INFO L225 Difference]: With dead ends: 665 [2018-09-23 21:24:09,651 INFO L226 Difference]: Without dead ends: 663 [2018-09-23 21:24:09,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:24:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2018-09-23 21:24:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 652. [2018-09-23 21:24:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-09-23 21:24:10,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 706 transitions. [2018-09-23 21:24:10,040 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 706 transitions. Word has length 639 [2018-09-23 21:24:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:10,040 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 706 transitions. [2018-09-23 21:24:10,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:24:10,040 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 706 transitions. [2018-09-23 21:24:10,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-09-23 21:24:10,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:10,043 INFO L375 BasicCegarLoop]: trace histogram [540, 54, 54, 1, 1, 1] [2018-09-23 21:24:10,043 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:10,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:10,044 INFO L82 PathProgramCache]: Analyzing trace with hash -300345953, now seen corresponding path program 57 times [2018-09-23 21:24:10,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:10,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:10,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:10,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:10,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-23 21:24:11,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:11,643 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 [2018-09-23 21:24:11,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:13,239 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 325 check-sat command(s) [2018-09-23 21:24:13,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:13,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-23 21:24:13,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:13,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 21:24:13,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 21:24:13,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 21:24:13,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:24:13,589 INFO L87 Difference]: Start difference. First operand 652 states and 706 transitions. Second operand 57 states. [2018-09-23 21:24:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:14,342 INFO L93 Difference]: Finished difference Result 677 states and 733 transitions. [2018-09-23 21:24:14,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:24:14,342 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 651 [2018-09-23 21:24:14,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:14,344 INFO L225 Difference]: With dead ends: 677 [2018-09-23 21:24:14,344 INFO L226 Difference]: Without dead ends: 675 [2018-09-23 21:24:14,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:24:14,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2018-09-23 21:24:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 664. [2018-09-23 21:24:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2018-09-23 21:24:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 719 transitions. [2018-09-23 21:24:14,734 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 719 transitions. Word has length 651 [2018-09-23 21:24:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:14,734 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 719 transitions. [2018-09-23 21:24:14,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 21:24:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 719 transitions. [2018-09-23 21:24:14,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-09-23 21:24:14,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:14,738 INFO L375 BasicCegarLoop]: trace histogram [550, 55, 55, 1, 1, 1] [2018-09-23 21:24:14,738 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:14,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:14,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1167188713, now seen corresponding path program 58 times [2018-09-23 21:24:14,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:14,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:14,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:14,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:14,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-09-23 21:24:16,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:16,286 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 [2018-09-23 21:24:16,297 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:16,664 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:16,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:16,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-09-23 21:24:16,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:16,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:24:16,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:24:16,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:24:16,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:24:16,981 INFO L87 Difference]: Start difference. First operand 664 states and 719 transitions. Second operand 58 states. [2018-09-23 21:24:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:17,763 INFO L93 Difference]: Finished difference Result 689 states and 746 transitions. [2018-09-23 21:24:17,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:24:17,763 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 663 [2018-09-23 21:24:17,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:17,766 INFO L225 Difference]: With dead ends: 689 [2018-09-23 21:24:17,766 INFO L226 Difference]: Without dead ends: 687 [2018-09-23 21:24:17,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 663 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:24:17,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-09-23 21:24:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 676. [2018-09-23 21:24:18,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2018-09-23 21:24:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 732 transitions. [2018-09-23 21:24:18,236 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 732 transitions. Word has length 663 [2018-09-23 21:24:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:18,237 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 732 transitions. [2018-09-23 21:24:18,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:24:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 732 transitions. [2018-09-23 21:24:18,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-09-23 21:24:18,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:18,240 INFO L375 BasicCegarLoop]: trace histogram [560, 56, 56, 1, 1, 1] [2018-09-23 21:24:18,240 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:18,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:18,241 INFO L82 PathProgramCache]: Analyzing trace with hash 119476531, now seen corresponding path program 59 times [2018-09-23 21:24:18,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:18,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:18,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:18,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:18,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-23 21:24:20,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:20,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:24:20,436 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:22,258 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 337 check-sat command(s) [2018-09-23 21:24:22,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:22,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-23 21:24:22,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:22,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 21:24:22,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:24:22,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:24:22,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:24:22,604 INFO L87 Difference]: Start difference. First operand 676 states and 732 transitions. Second operand 59 states. [2018-09-23 21:24:23,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:23,352 INFO L93 Difference]: Finished difference Result 701 states and 759 transitions. [2018-09-23 21:24:23,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:24:23,353 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 675 [2018-09-23 21:24:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:23,355 INFO L225 Difference]: With dead ends: 701 [2018-09-23 21:24:23,355 INFO L226 Difference]: Without dead ends: 699 [2018-09-23 21:24:23,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:24:23,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-09-23 21:24:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 688. [2018-09-23 21:24:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2018-09-23 21:24:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 745 transitions. [2018-09-23 21:24:23,806 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 745 transitions. Word has length 675 [2018-09-23 21:24:23,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:23,807 INFO L480 AbstractCegarLoop]: Abstraction has 688 states and 745 transitions. [2018-09-23 21:24:23,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:24:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 745 transitions. [2018-09-23 21:24:23,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2018-09-23 21:24:23,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:23,810 INFO L375 BasicCegarLoop]: trace histogram [570, 57, 57, 1, 1, 1] [2018-09-23 21:24:23,811 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:23,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:23,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1513562237, now seen corresponding path program 60 times [2018-09-23 21:24:23,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:23,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:23,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:23,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:23,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-09-23 21:24:25,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:25,688 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 [2018-09-23 21:24:25,697 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:27,545 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 339 check-sat command(s) [2018-09-23 21:24:27,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:27,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-09-23 21:24:27,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:27,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 21:24:27,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:24:27,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:24:27,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:24:27,887 INFO L87 Difference]: Start difference. First operand 688 states and 745 transitions. Second operand 60 states. [2018-09-23 21:24:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:28,796 INFO L93 Difference]: Finished difference Result 713 states and 772 transitions. [2018-09-23 21:24:28,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:24:28,797 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 687 [2018-09-23 21:24:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:28,799 INFO L225 Difference]: With dead ends: 713 [2018-09-23 21:24:28,799 INFO L226 Difference]: Without dead ends: 711 [2018-09-23 21:24:28,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:24:28,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2018-09-23 21:24:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 700. [2018-09-23 21:24:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-09-23 21:24:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 758 transitions. [2018-09-23 21:24:29,245 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 758 transitions. Word has length 687 [2018-09-23 21:24:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:29,246 INFO L480 AbstractCegarLoop]: Abstraction has 700 states and 758 transitions. [2018-09-23 21:24:29,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:24:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 758 transitions. [2018-09-23 21:24:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-09-23 21:24:29,249 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:29,249 INFO L375 BasicCegarLoop]: trace histogram [580, 58, 58, 1, 1, 1] [2018-09-23 21:24:29,249 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:29,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:29,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1754304711, now seen corresponding path program 61 times [2018-09-23 21:24:29,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:29,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:29,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:29,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:29,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-09-23 21:24:31,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:31,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:24:31,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:31,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-09-23 21:24:31,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:31,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 21:24:31,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 21:24:31,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 21:24:31,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:24:31,907 INFO L87 Difference]: Start difference. First operand 700 states and 758 transitions. Second operand 61 states. [2018-09-23 21:24:32,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:32,787 INFO L93 Difference]: Finished difference Result 725 states and 785 transitions. [2018-09-23 21:24:32,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 21:24:32,787 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 699 [2018-09-23 21:24:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:32,790 INFO L225 Difference]: With dead ends: 725 [2018-09-23 21:24:32,790 INFO L226 Difference]: Without dead ends: 723 [2018-09-23 21:24:32,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:24:32,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2018-09-23 21:24:33,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 712. [2018-09-23 21:24:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2018-09-23 21:24:33,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 771 transitions. [2018-09-23 21:24:33,250 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 771 transitions. Word has length 699 [2018-09-23 21:24:33,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:33,251 INFO L480 AbstractCegarLoop]: Abstraction has 712 states and 771 transitions. [2018-09-23 21:24:33,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 21:24:33,251 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 771 transitions. [2018-09-23 21:24:33,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-09-23 21:24:33,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:33,254 INFO L375 BasicCegarLoop]: trace histogram [590, 59, 59, 1, 1, 1] [2018-09-23 21:24:33,255 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:33,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:33,255 INFO L82 PathProgramCache]: Analyzing trace with hash -31333871, now seen corresponding path program 62 times [2018-09-23 21:24:33,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:33,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:33,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:33,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:33,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-09-23 21:24:35,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:35,336 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 [2018-09-23 21:24:35,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:35,737 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:35,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:35,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-09-23 21:24:36,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:36,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 21:24:36,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:24:36,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:24:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:24:36,088 INFO L87 Difference]: Start difference. First operand 712 states and 771 transitions. Second operand 62 states. [2018-09-23 21:24:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:36,995 INFO L93 Difference]: Finished difference Result 737 states and 798 transitions. [2018-09-23 21:24:36,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:24:36,996 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 711 [2018-09-23 21:24:36,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:36,998 INFO L225 Difference]: With dead ends: 737 [2018-09-23 21:24:36,998 INFO L226 Difference]: Without dead ends: 735 [2018-09-23 21:24:36,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:24:36,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-09-23 21:24:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 724. [2018-09-23 21:24:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-09-23 21:24:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 784 transitions. [2018-09-23 21:24:37,473 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 784 transitions. Word has length 711 [2018-09-23 21:24:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:37,474 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 784 transitions. [2018-09-23 21:24:37,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:24:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 784 transitions. [2018-09-23 21:24:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-09-23 21:24:37,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:37,478 INFO L375 BasicCegarLoop]: trace histogram [600, 60, 60, 1, 1, 1] [2018-09-23 21:24:37,479 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:37,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:37,479 INFO L82 PathProgramCache]: Analyzing trace with hash 690066523, now seen corresponding path program 63 times [2018-09-23 21:24:37,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:37,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:37,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:37,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:37,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-09-23 21:24:39,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:39,348 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 [2018-09-23 21:24:39,357 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:41,507 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 361 check-sat command(s) [2018-09-23 21:24:41,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:41,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-09-23 21:24:41,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:41,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 21:24:41,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 21:24:41,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 21:24:41,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:24:41,901 INFO L87 Difference]: Start difference. First operand 724 states and 784 transitions. Second operand 63 states. [2018-09-23 21:24:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:43,137 INFO L93 Difference]: Finished difference Result 749 states and 811 transitions. [2018-09-23 21:24:43,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 21:24:43,137 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 723 [2018-09-23 21:24:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:43,141 INFO L225 Difference]: With dead ends: 749 [2018-09-23 21:24:43,141 INFO L226 Difference]: Without dead ends: 747 [2018-09-23 21:24:43,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:24:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2018-09-23 21:24:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 736. [2018-09-23 21:24:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2018-09-23 21:24:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 797 transitions. [2018-09-23 21:24:43,792 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 797 transitions. Word has length 723 [2018-09-23 21:24:43,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:43,792 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 797 transitions. [2018-09-23 21:24:43,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 21:24:43,793 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 797 transitions. [2018-09-23 21:24:43,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2018-09-23 21:24:43,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:43,797 INFO L375 BasicCegarLoop]: trace histogram [610, 61, 61, 1, 1, 1] [2018-09-23 21:24:43,797 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:43,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:43,797 INFO L82 PathProgramCache]: Analyzing trace with hash -637130843, now seen corresponding path program 64 times [2018-09-23 21:24:43,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:43,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:43,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:43,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:43,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-09-23 21:24:46,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:46,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:24:46,061 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:46,476 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:46,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:46,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-09-23 21:24:46,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:46,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 21:24:46,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:24:46,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:24:46,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:24:46,835 INFO L87 Difference]: Start difference. First operand 736 states and 797 transitions. Second operand 64 states. [2018-09-23 21:24:47,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:47,814 INFO L93 Difference]: Finished difference Result 761 states and 824 transitions. [2018-09-23 21:24:47,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 21:24:47,815 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 735 [2018-09-23 21:24:47,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:47,818 INFO L225 Difference]: With dead ends: 761 [2018-09-23 21:24:47,818 INFO L226 Difference]: Without dead ends: 759 [2018-09-23 21:24:47,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:24:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-09-23 21:24:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 748. [2018-09-23 21:24:48,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-09-23 21:24:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 810 transitions. [2018-09-23 21:24:48,338 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 810 transitions. Word has length 735 [2018-09-23 21:24:48,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:48,338 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 810 transitions. [2018-09-23 21:24:48,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:24:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 810 transitions. [2018-09-23 21:24:48,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2018-09-23 21:24:48,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:48,342 INFO L375 BasicCegarLoop]: trace histogram [620, 62, 62, 1, 1, 1] [2018-09-23 21:24:48,342 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:48,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:48,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2088363025, now seen corresponding path program 65 times [2018-09-23 21:24:48,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:48,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:48,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:48,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:48,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-09-23 21:24:50,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:50,734 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 [2018-09-23 21:24:50,745 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:52,938 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 373 check-sat command(s) [2018-09-23 21:24:52,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:52,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-09-23 21:24:53,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:53,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 21:24:53,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 21:24:53,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 21:24:53,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:24:53,344 INFO L87 Difference]: Start difference. First operand 748 states and 810 transitions. Second operand 65 states. [2018-09-23 21:24:54,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:54,348 INFO L93 Difference]: Finished difference Result 773 states and 837 transitions. [2018-09-23 21:24:54,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:24:54,349 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 747 [2018-09-23 21:24:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:54,351 INFO L225 Difference]: With dead ends: 773 [2018-09-23 21:24:54,351 INFO L226 Difference]: Without dead ends: 771 [2018-09-23 21:24:54,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 747 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:24:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2018-09-23 21:24:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 760. [2018-09-23 21:24:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2018-09-23 21:24:54,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 823 transitions. [2018-09-23 21:24:54,885 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 823 transitions. Word has length 747 [2018-09-23 21:24:54,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:54,885 INFO L480 AbstractCegarLoop]: Abstraction has 760 states and 823 transitions. [2018-09-23 21:24:54,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 21:24:54,885 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 823 transitions. [2018-09-23 21:24:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2018-09-23 21:24:54,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:54,889 INFO L375 BasicCegarLoop]: trace histogram [630, 63, 63, 1, 1, 1] [2018-09-23 21:24:54,889 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:54,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:54,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1164447431, now seen corresponding path program 66 times [2018-09-23 21:24:54,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:54,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:54,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:54,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:54,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-09-23 21:24:56,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:56,953 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 [2018-09-23 21:24:56,959 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:59,179 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 374 check-sat command(s) [2018-09-23 21:24:59,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:59,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-09-23 21:24:59,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:59,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 21:24:59,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:24:59,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:24:59,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:24:59,590 INFO L87 Difference]: Start difference. First operand 760 states and 823 transitions. Second operand 66 states. [2018-09-23 21:25:00,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:00,644 INFO L93 Difference]: Finished difference Result 785 states and 850 transitions. [2018-09-23 21:25:00,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 21:25:00,644 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 759 [2018-09-23 21:25:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:00,647 INFO L225 Difference]: With dead ends: 785 [2018-09-23 21:25:00,647 INFO L226 Difference]: Without dead ends: 783 [2018-09-23 21:25:00,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 759 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:25:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-09-23 21:25:01,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 772. [2018-09-23 21:25:01,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2018-09-23 21:25:01,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 836 transitions. [2018-09-23 21:25:01,210 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 836 transitions. Word has length 759 [2018-09-23 21:25:01,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:01,211 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 836 transitions. [2018-09-23 21:25:01,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:25:01,211 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 836 transitions. [2018-09-23 21:25:01,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-09-23 21:25:01,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:01,215 INFO L375 BasicCegarLoop]: trace histogram [640, 64, 64, 1, 1, 1] [2018-09-23 21:25:01,216 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:01,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:01,216 INFO L82 PathProgramCache]: Analyzing trace with hash -697161853, now seen corresponding path program 67 times [2018-09-23 21:25:01,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:01,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:01,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:01,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:01,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-09-23 21:25:03,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:03,300 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 [2018-09-23 21:25:03,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:03,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-09-23 21:25:04,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:04,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 21:25:04,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 21:25:04,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 21:25:04,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:25:04,173 INFO L87 Difference]: Start difference. First operand 772 states and 836 transitions. Second operand 67 states. [2018-09-23 21:25:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:05,169 INFO L93 Difference]: Finished difference Result 797 states and 863 transitions. [2018-09-23 21:25:05,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 21:25:05,169 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 771 [2018-09-23 21:25:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:05,172 INFO L225 Difference]: With dead ends: 797 [2018-09-23 21:25:05,172 INFO L226 Difference]: Without dead ends: 795 [2018-09-23 21:25:05,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:25:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2018-09-23 21:25:05,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 784. [2018-09-23 21:25:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2018-09-23 21:25:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 849 transitions. [2018-09-23 21:25:05,837 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 849 transitions. Word has length 771 [2018-09-23 21:25:05,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:05,838 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 849 transitions. [2018-09-23 21:25:05,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 21:25:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 849 transitions. [2018-09-23 21:25:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2018-09-23 21:25:05,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:05,843 INFO L375 BasicCegarLoop]: trace histogram [650, 65, 65, 1, 1, 1] [2018-09-23 21:25:05,843 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:05,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:05,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1869922611, now seen corresponding path program 68 times [2018-09-23 21:25:05,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:05,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:05,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:05,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:05,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-09-23 21:25:07,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:07,984 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 [2018-09-23 21:25:07,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:25:08,428 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:25:08,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:08,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-09-23 21:25:08,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:08,920 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 21:25:08,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:25:08,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:25:08,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:25:08,921 INFO L87 Difference]: Start difference. First operand 784 states and 849 transitions. Second operand 68 states. [2018-09-23 21:25:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:10,049 INFO L93 Difference]: Finished difference Result 809 states and 876 transitions. [2018-09-23 21:25:10,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:25:10,049 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 783 [2018-09-23 21:25:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:10,052 INFO L225 Difference]: With dead ends: 809 [2018-09-23 21:25:10,052 INFO L226 Difference]: Without dead ends: 807 [2018-09-23 21:25:10,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:25:10,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2018-09-23 21:25:10,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 796. [2018-09-23 21:25:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2018-09-23 21:25:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 862 transitions. [2018-09-23 21:25:10,657 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 862 transitions. Word has length 783 [2018-09-23 21:25:10,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:10,657 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 862 transitions. [2018-09-23 21:25:10,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:25:10,657 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 862 transitions. [2018-09-23 21:25:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2018-09-23 21:25:10,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:10,662 INFO L375 BasicCegarLoop]: trace histogram [660, 66, 66, 1, 1, 1] [2018-09-23 21:25:10,662 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:10,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1533429993, now seen corresponding path program 69 times [2018-09-23 21:25:10,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:10,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:10,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:10,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:10,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-09-23 21:25:12,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:12,852 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 [2018-09-23 21:25:12,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:25:15,380 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 397 check-sat command(s) [2018-09-23 21:25:15,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:15,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-09-23 21:25:15,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:15,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 21:25:15,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 21:25:15,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 21:25:15,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:25:15,881 INFO L87 Difference]: Start difference. First operand 796 states and 862 transitions. Second operand 69 states. [2018-09-23 21:25:16,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:16,981 INFO L93 Difference]: Finished difference Result 821 states and 889 transitions. [2018-09-23 21:25:16,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 21:25:16,982 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 795 [2018-09-23 21:25:16,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:16,984 INFO L225 Difference]: With dead ends: 821 [2018-09-23 21:25:16,985 INFO L226 Difference]: Without dead ends: 819 [2018-09-23 21:25:16,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 795 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:25:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2018-09-23 21:25:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 808. [2018-09-23 21:25:17,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2018-09-23 21:25:17,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 875 transitions. [2018-09-23 21:25:17,655 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 875 transitions. Word has length 795 [2018-09-23 21:25:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:17,656 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 875 transitions. [2018-09-23 21:25:17,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 21:25:17,656 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 875 transitions. [2018-09-23 21:25:17,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-09-23 21:25:17,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:17,661 INFO L375 BasicCegarLoop]: trace histogram [670, 67, 67, 1, 1, 1] [2018-09-23 21:25:17,661 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:17,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:17,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1888751713, now seen corresponding path program 70 times [2018-09-23 21:25:17,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:17,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:17,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:17,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:17,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-09-23 21:25:19,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:19,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:25:19,957 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:25:20,415 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:25:20,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:20,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-09-23 21:25:20,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:20,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 21:25:20,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:25:20,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:25:20,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:25:20,886 INFO L87 Difference]: Start difference. First operand 808 states and 875 transitions. Second operand 70 states. [2018-09-23 21:25:22,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:22,126 INFO L93 Difference]: Finished difference Result 833 states and 902 transitions. [2018-09-23 21:25:22,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 21:25:22,127 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 807 [2018-09-23 21:25:22,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:22,130 INFO L225 Difference]: With dead ends: 833 [2018-09-23 21:25:22,130 INFO L226 Difference]: Without dead ends: 831 [2018-09-23 21:25:22,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:25:22,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-09-23 21:25:22,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 820. [2018-09-23 21:25:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-09-23 21:25:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 888 transitions. [2018-09-23 21:25:22,785 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 888 transitions. Word has length 807 [2018-09-23 21:25:22,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:22,785 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 888 transitions. [2018-09-23 21:25:22,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:25:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 888 transitions. [2018-09-23 21:25:22,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2018-09-23 21:25:22,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:22,790 INFO L375 BasicCegarLoop]: trace histogram [680, 68, 68, 1, 1, 1] [2018-09-23 21:25:22,790 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:22,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:22,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1800353109, now seen corresponding path program 71 times [2018-09-23 21:25:22,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:22,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:22,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:22,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:22,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-09-23 21:25:25,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:25,164 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 [2018-09-23 21:25:25,171 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:25:27,660 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 409 check-sat command(s) [2018-09-23 21:25:27,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:27,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-09-23 21:25:28,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:28,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 21:25:28,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 21:25:28,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 21:25:28,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:25:28,093 INFO L87 Difference]: Start difference. First operand 820 states and 888 transitions. Second operand 71 states. [2018-09-23 21:25:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:29,176 INFO L93 Difference]: Finished difference Result 845 states and 915 transitions. [2018-09-23 21:25:29,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:25:29,177 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 819 [2018-09-23 21:25:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:29,180 INFO L225 Difference]: With dead ends: 845 [2018-09-23 21:25:29,180 INFO L226 Difference]: Without dead ends: 843 [2018-09-23 21:25:29,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 819 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:25:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2018-09-23 21:25:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 832. [2018-09-23 21:25:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2018-09-23 21:25:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 901 transitions. [2018-09-23 21:25:29,861 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 901 transitions. Word has length 819 [2018-09-23 21:25:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:29,862 INFO L480 AbstractCegarLoop]: Abstraction has 832 states and 901 transitions. [2018-09-23 21:25:29,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 21:25:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 901 transitions. [2018-09-23 21:25:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2018-09-23 21:25:29,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:29,867 INFO L375 BasicCegarLoop]: trace histogram [690, 69, 69, 1, 1, 1] [2018-09-23 21:25:29,867 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:29,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:29,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1822005771, now seen corresponding path program 72 times [2018-09-23 21:25:29,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:29,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:29,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:29,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:29,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-09-23 21:25:32,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:32,495 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 [2018-09-23 21:25:32,501 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:25:35,059 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 411 check-sat command(s) [2018-09-23 21:25:35,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:35,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-09-23 21:25:35,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:35,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 21:25:35,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:25:35,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:25:35,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:25:35,660 INFO L87 Difference]: Start difference. First operand 832 states and 901 transitions. Second operand 72 states. [2018-09-23 21:25:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:36,880 INFO L93 Difference]: Finished difference Result 857 states and 928 transitions. [2018-09-23 21:25:36,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:25:36,881 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 831 [2018-09-23 21:25:36,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:36,883 INFO L225 Difference]: With dead ends: 857 [2018-09-23 21:25:36,883 INFO L226 Difference]: Without dead ends: 855 [2018-09-23 21:25:36,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:25:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2018-09-23 21:25:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 844. [2018-09-23 21:25:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2018-09-23 21:25:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 914 transitions. [2018-09-23 21:25:37,595 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 914 transitions. Word has length 831 [2018-09-23 21:25:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:37,596 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 914 transitions. [2018-09-23 21:25:37,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:25:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 914 transitions. [2018-09-23 21:25:37,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2018-09-23 21:25:37,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:37,600 INFO L375 BasicCegarLoop]: trace histogram [700, 70, 70, 1, 1, 1] [2018-09-23 21:25:37,601 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:37,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:37,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1902862911, now seen corresponding path program 73 times [2018-09-23 21:25:37,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:37,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:37,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:37,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:37,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-09-23 21:25:40,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:40,027 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 [2018-09-23 21:25:40,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:40,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-09-23 21:25:40,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:40,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 21:25:40,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 21:25:40,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 21:25:40,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:25:40,986 INFO L87 Difference]: Start difference. First operand 844 states and 914 transitions. Second operand 73 states. [2018-09-23 21:25:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:42,257 INFO L93 Difference]: Finished difference Result 869 states and 941 transitions. [2018-09-23 21:25:42,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 21:25:42,258 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 843 [2018-09-23 21:25:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:42,260 INFO L225 Difference]: With dead ends: 869 [2018-09-23 21:25:42,260 INFO L226 Difference]: Without dead ends: 867 [2018-09-23 21:25:42,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:25:42,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2018-09-23 21:25:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 856. [2018-09-23 21:25:42,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2018-09-23 21:25:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 927 transitions. [2018-09-23 21:25:42,992 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 927 transitions. Word has length 843 [2018-09-23 21:25:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:42,993 INFO L480 AbstractCegarLoop]: Abstraction has 856 states and 927 transitions. [2018-09-23 21:25:42,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 21:25:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 927 transitions. [2018-09-23 21:25:42,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2018-09-23 21:25:42,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:42,998 INFO L375 BasicCegarLoop]: trace histogram [710, 71, 71, 1, 1, 1] [2018-09-23 21:25:42,998 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:42,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:42,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1438007177, now seen corresponding path program 74 times [2018-09-23 21:25:42,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:42,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:42,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:42,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:42,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-09-23 21:25:45,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:45,623 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 [2018-09-23 21:25:45,630 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:25:46,090 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:25:46,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:46,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-09-23 21:25:46,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:46,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 21:25:46,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 21:25:46,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 21:25:46,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:25:46,663 INFO L87 Difference]: Start difference. First operand 856 states and 927 transitions. Second operand 74 states. [2018-09-23 21:25:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:47,991 INFO L93 Difference]: Finished difference Result 881 states and 954 transitions. [2018-09-23 21:25:47,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 21:25:47,992 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 855 [2018-09-23 21:25:47,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:47,994 INFO L225 Difference]: With dead ends: 881 [2018-09-23 21:25:47,994 INFO L226 Difference]: Without dead ends: 879 [2018-09-23 21:25:47,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:25:47,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-09-23 21:25:48,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 868. [2018-09-23 21:25:48,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2018-09-23 21:25:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 940 transitions. [2018-09-23 21:25:48,716 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 940 transitions. Word has length 855 [2018-09-23 21:25:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:48,716 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 940 transitions. [2018-09-23 21:25:48,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 21:25:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 940 transitions. [2018-09-23 21:25:48,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2018-09-23 21:25:48,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:48,721 INFO L375 BasicCegarLoop]: trace histogram [720, 72, 72, 1, 1, 1] [2018-09-23 21:25:48,722 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:48,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:48,722 INFO L82 PathProgramCache]: Analyzing trace with hash 696090067, now seen corresponding path program 75 times [2018-09-23 21:25:48,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:48,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:48,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:48,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:48,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-09-23 21:25:51,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:51,338 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 [2018-09-23 21:25:51,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:25:54,305 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 433 check-sat command(s) [2018-09-23 21:25:54,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:54,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-09-23 21:25:54,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:54,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 21:25:54,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 21:25:54,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 21:25:54,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:25:54,830 INFO L87 Difference]: Start difference. First operand 868 states and 940 transitions. Second operand 75 states. [2018-09-23 21:25:56,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:56,124 INFO L93 Difference]: Finished difference Result 893 states and 967 transitions. [2018-09-23 21:25:56,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 21:25:56,125 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 867 [2018-09-23 21:25:56,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:56,126 INFO L225 Difference]: With dead ends: 893 [2018-09-23 21:25:56,126 INFO L226 Difference]: Without dead ends: 891 [2018-09-23 21:25:56,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:25:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2018-09-23 21:25:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 880. [2018-09-23 21:25:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2018-09-23 21:25:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 953 transitions. [2018-09-23 21:25:56,866 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 953 transitions. Word has length 867 [2018-09-23 21:25:56,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:56,866 INFO L480 AbstractCegarLoop]: Abstraction has 880 states and 953 transitions. [2018-09-23 21:25:56,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 21:25:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 953 transitions. [2018-09-23 21:25:56,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2018-09-23 21:25:56,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:56,872 INFO L375 BasicCegarLoop]: trace histogram [730, 73, 73, 1, 1, 1] [2018-09-23 21:25:56,872 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:56,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:56,872 INFO L82 PathProgramCache]: Analyzing trace with hash 943168797, now seen corresponding path program 76 times [2018-09-23 21:25:56,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:56,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:56,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:56,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:56,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-09-23 21:25:59,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:59,532 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 [2018-09-23 21:25:59,539 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:00,023 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:00,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:00,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-09-23 21:26:00,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:00,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 21:26:00,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 21:26:00,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 21:26:00,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:26:00,582 INFO L87 Difference]: Start difference. First operand 880 states and 953 transitions. Second operand 76 states. [2018-09-23 21:26:01,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:01,796 INFO L93 Difference]: Finished difference Result 905 states and 980 transitions. [2018-09-23 21:26:01,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 21:26:01,797 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 879 [2018-09-23 21:26:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:01,798 INFO L225 Difference]: With dead ends: 905 [2018-09-23 21:26:01,799 INFO L226 Difference]: Without dead ends: 903 [2018-09-23 21:26:01,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 879 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:26:01,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2018-09-23 21:26:02,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 892. [2018-09-23 21:26:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2018-09-23 21:26:02,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 966 transitions. [2018-09-23 21:26:02,573 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 966 transitions. Word has length 879 [2018-09-23 21:26:02,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:02,573 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 966 transitions. [2018-09-23 21:26:02,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 21:26:02,573 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 966 transitions. [2018-09-23 21:26:02,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2018-09-23 21:26:02,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:02,579 INFO L375 BasicCegarLoop]: trace histogram [740, 74, 74, 1, 1, 1] [2018-09-23 21:26:02,579 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:02,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:02,579 INFO L82 PathProgramCache]: Analyzing trace with hash -811917977, now seen corresponding path program 77 times [2018-09-23 21:26:02,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:02,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:02,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:02,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:02,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-09-23 21:26:05,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:05,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:26:05,328 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:08,290 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 445 check-sat command(s) [2018-09-23 21:26:08,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:08,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-09-23 21:26:08,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:08,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 21:26:08,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 21:26:08,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 21:26:08,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:26:08,839 INFO L87 Difference]: Start difference. First operand 892 states and 966 transitions. Second operand 77 states. [2018-09-23 21:26:10,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:10,220 INFO L93 Difference]: Finished difference Result 917 states and 993 transitions. [2018-09-23 21:26:10,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 21:26:10,220 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 891 [2018-09-23 21:26:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:10,222 INFO L225 Difference]: With dead ends: 917 [2018-09-23 21:26:10,222 INFO L226 Difference]: Without dead ends: 915 [2018-09-23 21:26:10,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:26:10,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-09-23 21:26:11,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 904. [2018-09-23 21:26:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2018-09-23 21:26:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 979 transitions. [2018-09-23 21:26:11,092 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 979 transitions. Word has length 891 [2018-09-23 21:26:11,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:11,092 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 979 transitions. [2018-09-23 21:26:11,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 21:26:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 979 transitions. [2018-09-23 21:26:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2018-09-23 21:26:11,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:11,099 INFO L375 BasicCegarLoop]: trace histogram [750, 75, 75, 1, 1, 1] [2018-09-23 21:26:11,099 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:11,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:11,099 INFO L82 PathProgramCache]: Analyzing trace with hash -543261007, now seen corresponding path program 78 times [2018-09-23 21:26:11,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:11,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:11,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:11,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:11,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-09-23 21:26:14,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:14,250 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 [2018-09-23 21:26:14,257 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:17,334 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 446 check-sat command(s) [2018-09-23 21:26:17,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:17,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-09-23 21:26:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-09-23 21:26:17,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:17,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 21:26:17,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 21:26:17,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 21:26:17,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:26:17,927 INFO L87 Difference]: Start difference. First operand 904 states and 979 transitions. Second operand 78 states. [2018-09-23 21:26:17,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-23 21:26:17,928 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:26:17,933 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:26:17,933 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:26:17 BoogieIcfgContainer [2018-09-23 21:26:17,934 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:26:17,934 INFO L168 Benchmark]: Toolchain (without parser) took 243351.71 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 257.7 MB. Max. memory is 7.1 GB. [2018-09-23 21:26:17,936 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 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. [2018-09-23 21:26:17,936 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.95 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. [2018-09-23 21:26:17,937 INFO L168 Benchmark]: Boogie Preprocessor took 21.55 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. [2018-09-23 21:26:17,937 INFO L168 Benchmark]: RCFGBuilder took 374.86 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. [2018-09-23 21:26:17,937 INFO L168 Benchmark]: TraceAbstraction took 242907.25 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 236.6 MB. Max. memory is 7.1 GB. [2018-09-23 21:26:17,940 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 0.21 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 41.95 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 21.55 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 374.86 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 242907.25 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 236.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 35]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 35). Cancelled while BasicCegarLoop was constructing difference of abstraction (904states) and FLOYD_HOARE automaton (currently 2 states, 78 states before enhancement), while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 242.8s OverallTime, 80 OverallIterations, 750 TraceHistogramMax, 52.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 314 SDtfs, 5694 SDslu, 4172 SDs, 0 SdLazy, 7251 SolverSat, 452 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37575 GetRequests, 34385 SyntacticMatches, 0 SemanticMatches, 3190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5190 ImplicationChecksByTransitivity, 81.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=79, 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: 20.2s AutomataMinimizationTime, 79 MinimizatonAttempts, 796 StatesRemovedByMinimization, 75 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 4.3s SsaConstructionTime, 52.2s SatisfiabilityAnalysisTime, 96.4s InterpolantComputationTime, 68840 NumberOfCodeBlocks, 68669 NumberOfCodeBlocksAsserted, 8912 NumberOfCheckSat, 68682 ConstructedInterpolants, 0 QuantifiedInterpolants, 124587192 SizeOfPredicates, 78 NumberOfNonLiveVariables, 137598 ConjunctsInSsa, 3030 ConjunctsInUnsatCore, 158 InterpolantComputations, 2 PerfectInterpolantSequences, 315983/17469377 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/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-26-17-958.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-26-17-958.csv Completed graceful shutdown