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/20170304-DifficultPathPrograms/down.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:22:10,754 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:22:10,756 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:22:10,768 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-04 12:22:10,824 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 [2018-10-04 12:22:10,854 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:22:10,854 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:22:10,855 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:22:10,855 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:22:10,856 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:22:10,856 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:22:10,856 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:22:10,858 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:22:10,858 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:22:10,858 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:22:10,858 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:22:10,858 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:22:10,859 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:22:10,859 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:22:10,859 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:22:10,859 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:22:10,859 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:22:10,860 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:22:10,861 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:22:10,861 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:22:10,861 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:22:10,862 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:22:10,862 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:22:10,862 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:22:10,862 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:22:10,862 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:22:10,863 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:22:10,863 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:22:10,864 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:22:10,864 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:22:10,913 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:22:10,926 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:22:10,930 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:22:10,932 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:22:10,932 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:22:10,933 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl [2018-10-04 12:22:10,933 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl' [2018-10-04 12:22:10,987 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:22:10,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:22:10,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:22:10,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:22:10,990 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:22:11,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:22:10" (1/1) ... [2018-10-04 12:22:11,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:22:10" (1/1) ... [2018-10-04 12:22:11,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:22:11,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:22:11,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:22:11,032 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:22:11,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:22:10" (1/1) ... [2018-10-04 12:22:11,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:22:10" (1/1) ... [2018-10-04 12:22:11,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:22:10" (1/1) ... [2018-10-04 12:22:11,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:22:10" (1/1) ... [2018-10-04 12:22:11,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:22:10" (1/1) ... [2018-10-04 12:22:11,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:22:10" (1/1) ... [2018-10-04 12:22:11,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:22:10" (1/1) ... [2018-10-04 12:22:11,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:22:11,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:22:11,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:22:11,054 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:22:11,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:22:10" (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 [2018-10-04 12:22:11,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:22:11,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:22:11,425 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:22:11,426 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:22:11 BoogieIcfgContainer [2018-10-04 12:22:11,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:22:11,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:22:11,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:22:11,431 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:22:11,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:22:10" (1/2) ... [2018-10-04 12:22:11,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e64fe5 and model type down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:22:11, skipping insertion in model container [2018-10-04 12:22:11,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:22:11" (2/2) ... [2018-10-04 12:22:11,435 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bpl [2018-10-04 12:22:11,445 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:22:11,456 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:22:11,511 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:22:11,512 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:22:11,512 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:22:11,512 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:22:11,512 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:22:11,512 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:22:11,513 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:22:11,513 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:22:11,513 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:22:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-04 12:22:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:22:11,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:11,539 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 12:22:11,540 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:11,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:11,547 INFO L82 PathProgramCache]: Analyzing trace with hash 889539593, now seen corresponding path program 1 times [2018-10-04 12:22:11,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:11,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:11,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:11,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:11,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:11,734 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:22:11,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:22:11,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:22:11,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:22:11,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:22:11,752 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-10-04 12:22:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:11,956 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-10-04 12:22:11,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:22:11,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 12:22:11,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:11,967 INFO L225 Difference]: With dead ends: 16 [2018-10-04 12:22:11,967 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:22:11,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:22:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:22:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:22:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:22:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 12:22:12,008 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-04 12:22:12,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:12,008 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 12:22:12,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:22:12,009 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 12:22:12,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:22:12,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:12,009 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:22:12,010 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:12,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:12,010 INFO L82 PathProgramCache]: Analyzing trace with hash 198622019, now seen corresponding path program 1 times [2018-10-04 12:22:12,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:12,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:12,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:12,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:12,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:12,101 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:22:12,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-04 12:22:12,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:22:12,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:22:12,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:22:12,104 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-04 12:22:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:12,190 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-04 12:22:12,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:22:12,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 12:22:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:12,193 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:22:12,193 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:22:12,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:22:12,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:22:12,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-10-04 12:22:12,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:22:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 12:22:12,199 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-04 12:22:12,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:12,199 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 12:22:12,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:22:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 12:22:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:22:12,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:12,200 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:22:12,201 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:12,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:12,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1897132479, now seen corresponding path program 1 times [2018-10-04 12:22:12,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:12,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:12,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:12,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:12,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:12,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:12,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:22:12,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:12,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:12,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:12,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:22:12,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:22:12,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:22:12,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:22:12,456 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-10-04 12:22:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:12,649 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-04 12:22:12,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:22:12,649 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 12:22:12,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:12,651 INFO L225 Difference]: With dead ends: 20 [2018-10-04 12:22:12,651 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:22:12,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:22:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:22:12,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:22:12,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:22:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-04 12:22:12,656 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-04 12:22:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:12,657 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-04 12:22:12,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:22:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-04 12:22:12,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:22:12,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:12,658 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 12:22:12,658 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:12,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:12,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1765329927, now seen corresponding path program 2 times [2018-10-04 12:22:12,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:12,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:12,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:12,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:12,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:12,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:12,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:22:12,942 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:22:12,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:22:12,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:12,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:13,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:13,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-04 12:22:13,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:22:13,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:22:13,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:22:13,033 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-04 12:22:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:13,294 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-04 12:22:13,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:22:13,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-04 12:22:13,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:13,296 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:22:13,297 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:22:13,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:22:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:22:13,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-04 12:22:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:22:13,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-04 12:22:13,304 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-10-04 12:22:13,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:13,304 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-04 12:22:13,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:22:13,305 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-04 12:22:13,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:22:13,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:13,306 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-04 12:22:13,306 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:13,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:13,306 INFO L82 PathProgramCache]: Analyzing trace with hash 29955317, now seen corresponding path program 3 times [2018-10-04 12:22:13,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:13,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:13,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:13,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:13,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:13,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:13,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:22:13,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:22:13,494 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 12:22:13,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:13,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:13,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:13,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:22:13,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:22:13,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:22:13,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:22:13,532 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-10-04 12:22:13,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:13,669 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-04 12:22:13,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:22:13,670 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 12:22:13,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:13,671 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:22:13,671 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:22:13,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:22:13,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:22:13,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:22:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:22:13,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-04 12:22:13,677 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-10-04 12:22:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:13,677 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-04 12:22:13,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:22:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-04 12:22:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:22:13,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:13,678 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-10-04 12:22:13,679 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:13,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:13,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1153652177, now seen corresponding path program 4 times [2018-10-04 12:22:13,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:13,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:13,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:13,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:13,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:14,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:14,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:22:14,049 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:22:14,062 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:22:14,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:14,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:14,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:14,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-04 12:22:14,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:22:14,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:22:14,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:22:14,115 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-04 12:22:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:14,290 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-04 12:22:14,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:22:14,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 12:22:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:14,293 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:22:14,293 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:22:14,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:22:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:22:14,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-04 12:22:14,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:22:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-04 12:22:14,300 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-10-04 12:22:14,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:14,301 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-04 12:22:14,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:22:14,301 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-04 12:22:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:22:14,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:14,302 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-04 12:22:14,302 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:14,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:14,303 INFO L82 PathProgramCache]: Analyzing trace with hash -558246485, now seen corresponding path program 5 times [2018-10-04 12:22:14,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:14,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:14,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:14,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:14,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:14,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:14,606 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 [2018-10-04 12:22:14,614 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:22:14,650 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 12:22:14,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:14,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:14,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:14,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:22:14,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:22:14,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:22:14,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:22:14,687 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-10-04 12:22:14,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:14,818 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-04 12:22:14,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:22:14,818 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 12:22:14,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:14,819 INFO L225 Difference]: With dead ends: 32 [2018-10-04 12:22:14,819 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:22:14,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:22:14,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:22:14,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:22:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:22:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-04 12:22:14,825 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-04 12:22:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:14,825 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-04 12:22:14,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:22:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-04 12:22:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:22:14,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:14,826 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-10-04 12:22:14,827 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:14,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:14,827 INFO L82 PathProgramCache]: Analyzing trace with hash -578011675, now seen corresponding path program 6 times [2018-10-04 12:22:14,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:14,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:14,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:14,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:14,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:15,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:15,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:22:15,018 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:22:15,050 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 12:22:15,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:15,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:15,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:15,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-04 12:22:15,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:22:15,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:22:15,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:22:15,101 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-10-04 12:22:15,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:15,281 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-04 12:22:15,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:22:15,282 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-04 12:22:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:15,283 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:22:15,284 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:22:15,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:22:15,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:22:15,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-10-04 12:22:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:22:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-04 12:22:15,291 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-10-04 12:22:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:15,291 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-04 12:22:15,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:22:15,291 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-04 12:22:15,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:22:15,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:15,292 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-10-04 12:22:15,293 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:15,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:15,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1418505247, now seen corresponding path program 7 times [2018-10-04 12:22:15,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:15,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:15,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:15,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:15,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:15,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:15,425 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 [2018-10-04 12:22:15,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:15,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:15,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:15,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:22:15,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:22:15,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:22:15,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:22:15,486 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-10-04 12:22:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:15,638 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-04 12:22:15,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:22:15,638 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 12:22:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:15,639 INFO L225 Difference]: With dead ends: 38 [2018-10-04 12:22:15,640 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:22:15,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:22:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:22:15,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:22:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:22:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-04 12:22:15,646 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-10-04 12:22:15,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:15,646 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-04 12:22:15,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:22:15,646 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-04 12:22:15,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:22:15,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:15,647 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-10-04 12:22:15,648 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:15,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:15,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1375531237, now seen corresponding path program 8 times [2018-10-04 12:22:15,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:15,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:15,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:15,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:15,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:15,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:15,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:22:15,785 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:22:15,804 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:22:15,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:15,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:15,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:15,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-04 12:22:15,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:22:15,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:22:15,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:22:15,881 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-10-04 12:22:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:16,152 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-04 12:22:16,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:22:16,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-10-04 12:22:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:16,156 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:22:16,156 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:22:16,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:22:16,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:22:16,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-10-04 12:22:16,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:22:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-04 12:22:16,168 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-04 12:22:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:16,170 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-04 12:22:16,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:22:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-04 12:22:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:22:16,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:16,171 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-04 12:22:16,172 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:16,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:16,172 INFO L82 PathProgramCache]: Analyzing trace with hash 964341655, now seen corresponding path program 9 times [2018-10-04 12:22:16,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:16,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:16,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:16,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:16,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:16,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:16,575 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 [2018-10-04 12:22:16,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:22:16,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 12:22:16,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:16,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:16,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:16,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:22:16,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:22:16,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:22:16,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:22:16,663 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-10-04 12:22:16,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:16,888 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-04 12:22:16,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:22:16,888 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 12:22:16,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:16,889 INFO L225 Difference]: With dead ends: 44 [2018-10-04 12:22:16,890 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:22:16,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:22:16,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:22:16,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:22:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:22:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-04 12:22:16,896 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-10-04 12:22:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:16,897 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-04 12:22:16,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:22:16,897 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-04 12:22:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:22:16,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:16,898 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-10-04 12:22:16,898 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:16,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:16,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1427751471, now seen corresponding path program 10 times [2018-10-04 12:22:16,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:16,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:16,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:16,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:16,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:17,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:17,550 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 [2018-10-04 12:22:17,560 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:22:17,579 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:22:17,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:17,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:17,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:17,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-04 12:22:17,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:22:17,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:22:17,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:22:17,657 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-10-04 12:22:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:17,867 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-04 12:22:17,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:22:17,867 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-04 12:22:17,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:17,869 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:22:17,869 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:22:17,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:22:17,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:22:17,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-10-04 12:22:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:22:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-04 12:22:17,877 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-10-04 12:22:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:17,878 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-04 12:22:17,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:22:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-04 12:22:17,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:22:17,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:17,879 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-10-04 12:22:17,879 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:17,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:17,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1974662963, now seen corresponding path program 11 times [2018-10-04 12:22:17,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:17,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:17,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:17,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:17,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:18,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:18,157 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 [2018-10-04 12:22:18,166 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:22:18,219 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 12:22:18,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:18,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:18,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:18,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:22:18,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:22:18,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:22:18,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:22:18,265 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-10-04 12:22:19,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:19,007 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-04 12:22:19,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:22:19,007 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 12:22:19,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:19,008 INFO L225 Difference]: With dead ends: 50 [2018-10-04 12:22:19,008 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:22:19,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:22:19,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:22:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:22:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:22:19,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-04 12:22:19,015 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-10-04 12:22:19,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:19,016 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-04 12:22:19,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:22:19,016 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-04 12:22:19,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:22:19,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:19,017 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-10-04 12:22:19,017 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:19,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:19,017 INFO L82 PathProgramCache]: Analyzing trace with hash 577956359, now seen corresponding path program 12 times [2018-10-04 12:22:19,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:19,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:19,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:19,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:19,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:19,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:19,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:22:19,345 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:22:19,459 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 12:22:19,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:19,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:19,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:19,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-04 12:22:19,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:22:19,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:22:19,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:22:19,559 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-10-04 12:22:19,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:19,733 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-04 12:22:19,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:22:19,733 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-10-04 12:22:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:19,734 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:22:19,735 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:22:19,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:22:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:22:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-04 12:22:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:22:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-04 12:22:19,741 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-10-04 12:22:19,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:19,741 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-04 12:22:19,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:22:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-04 12:22:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:22:19,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:19,742 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-04 12:22:19,742 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:19,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:19,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1365213059, now seen corresponding path program 13 times [2018-10-04 12:22:19,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:19,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:19,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:19,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:19,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:19,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:19,916 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 [2018-10-04 12:22:19,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:19,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:19,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:19,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:22:19,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:22:19,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:22:19,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:22:19,982 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-10-04 12:22:20,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:20,735 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-04 12:22:20,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:22:20,735 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 12:22:20,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:20,736 INFO L225 Difference]: With dead ends: 56 [2018-10-04 12:22:20,736 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:22:20,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:22:20,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:22:20,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:22:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:22:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-04 12:22:20,743 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-10-04 12:22:20,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:20,743 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-04 12:22:20,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:22:20,743 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-04 12:22:20,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:22:20,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:20,744 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-10-04 12:22:20,744 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:20,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:20,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1260506179, now seen corresponding path program 14 times [2018-10-04 12:22:20,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:20,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:20,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:20,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:20,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:20,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:20,892 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 [2018-10-04 12:22:20,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:22:20,932 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:22:20,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:20,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:21,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:21,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-04 12:22:21,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:22:21,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:22:21,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:22:21,003 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-10-04 12:22:21,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:21,157 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-04 12:22:21,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:22:21,158 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-10-04 12:22:21,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:21,159 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:22:21,159 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:22:21,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:22:21,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:22:21,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-10-04 12:22:21,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:22:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-04 12:22:21,167 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-10-04 12:22:21,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:21,168 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-04 12:22:21,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:22:21,168 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-04 12:22:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:22:21,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:21,169 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-10-04 12:22:21,169 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:21,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:21,170 INFO L82 PathProgramCache]: Analyzing trace with hash -165727303, now seen corresponding path program 15 times [2018-10-04 12:22:21,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:21,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:21,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:21,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:21,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:21,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:21,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:22:21,814 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:22:21,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 12:22:21,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:21,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:21,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:21,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:22:21,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:22:21,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:22:21,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:22:21,887 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-10-04 12:22:22,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:22,196 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-04 12:22:22,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:22:22,197 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 12:22:22,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:22,197 INFO L225 Difference]: With dead ends: 62 [2018-10-04 12:22:22,197 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:22:22,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:22:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:22:22,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:22:22,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:22:22,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-04 12:22:22,205 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-10-04 12:22:22,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:22,205 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-04 12:22:22,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:22:22,205 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-04 12:22:22,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:22:22,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:22,206 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-10-04 12:22:22,206 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:22,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:22,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1448426227, now seen corresponding path program 16 times [2018-10-04 12:22:22,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:22,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:22,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:22,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:22,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:22,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:22,441 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 [2018-10-04 12:22:22,449 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:22:22,472 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:22:22,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:22,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:22,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:22,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-04 12:22:22,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:22:22,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:22:22,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:22:22,523 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-10-04 12:22:22,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:22,697 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-04 12:22:22,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:22:22,697 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-04 12:22:22,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:22,698 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:22:22,698 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:22:22,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:22:22,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:22:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-10-04 12:22:22,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:22:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-04 12:22:22,707 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-10-04 12:22:22,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:22,708 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-04 12:22:22,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:22:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-04 12:22:22,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:22:22,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:22,709 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-04 12:22:22,709 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:22,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:22,709 INFO L82 PathProgramCache]: Analyzing trace with hash 368133487, now seen corresponding path program 17 times [2018-10-04 12:22:22,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:22,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:22,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:22,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:22,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:22,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:22,964 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 [2018-10-04 12:22:22,973 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:22:22,999 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 12:22:22,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:23,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:23,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:23,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:22:23,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:22:23,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:22:23,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:22:23,042 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-10-04 12:22:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:23,714 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-04 12:22:23,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:22:23,715 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 12:22:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:23,716 INFO L225 Difference]: With dead ends: 68 [2018-10-04 12:22:23,716 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:22:23,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:22:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:22:23,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:22:23,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:22:23,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-04 12:22:23,726 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-04 12:22:23,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:23,727 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-04 12:22:23,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:22:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-04 12:22:23,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:22:23,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:23,728 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-10-04 12:22:23,728 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:23,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:23,728 INFO L82 PathProgramCache]: Analyzing trace with hash -788717655, now seen corresponding path program 18 times [2018-10-04 12:22:23,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:23,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:23,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:23,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:23,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:24,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:24,068 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 [2018-10-04 12:22:24,082 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:22:24,123 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-04 12:22:24,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:24,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:24,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:24,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-04 12:22:24,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:22:24,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:22:24,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:22:24,200 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-10-04 12:22:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:24,475 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-04 12:22:24,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:22:24,475 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-04 12:22:24,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:24,476 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:22:24,477 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:22:24,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:22:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:22:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-10-04 12:22:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:22:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-04 12:22:24,486 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-10-04 12:22:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:24,487 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-04 12:22:24,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:22:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-04 12:22:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:22:24,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:24,488 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-10-04 12:22:24,488 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:24,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2043489115, now seen corresponding path program 19 times [2018-10-04 12:22:24,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:24,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:24,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:24,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:24,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:25,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:25,362 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 [2018-10-04 12:22:25,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:25,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:25,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:25,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:22:25,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:22:25,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:22:25,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:22:25,435 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-10-04 12:22:26,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:26,017 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-04 12:22:26,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:22:26,017 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 12:22:26,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:26,018 INFO L225 Difference]: With dead ends: 74 [2018-10-04 12:22:26,018 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:22:26,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:22:26,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:22:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:22:26,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:22:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-04 12:22:26,030 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-10-04 12:22:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:26,031 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-04 12:22:26,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:22:26,031 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-04 12:22:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:22:26,032 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:26,032 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-10-04 12:22:26,032 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:26,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:26,033 INFO L82 PathProgramCache]: Analyzing trace with hash -957152801, now seen corresponding path program 20 times [2018-10-04 12:22:26,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:26,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:26,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:26,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:26,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:26,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:26,705 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 [2018-10-04 12:22:26,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:22:26,742 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:22:26,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:26,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:26,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:26,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-04 12:22:26,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:22:26,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:22:26,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:22:26,846 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-10-04 12:22:27,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:27,157 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-04 12:22:27,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:22:27,159 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-10-04 12:22:27,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:27,160 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:22:27,160 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:22:27,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:22:27,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:22:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-10-04 12:22:27,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:22:27,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-04 12:22:27,171 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-04 12:22:27,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:27,171 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-04 12:22:27,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:22:27,171 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-04 12:22:27,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:22:27,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:27,172 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-04 12:22:27,172 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:27,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:27,173 INFO L82 PathProgramCache]: Analyzing trace with hash -700907173, now seen corresponding path program 21 times [2018-10-04 12:22:27,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:27,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:27,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:27,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:27,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:27,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:27,600 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 [2018-10-04 12:22:27,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:22:27,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 12:22:27,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:27,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:27,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:27,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:22:27,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:22:27,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:22:27,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:22:27,704 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-10-04 12:22:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:28,116 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-04 12:22:28,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:22:28,117 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 12:22:28,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:28,117 INFO L225 Difference]: With dead ends: 80 [2018-10-04 12:22:28,118 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:22:28,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:22:28,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:22:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:22:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:22:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-04 12:22:28,125 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-10-04 12:22:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:28,125 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-04 12:22:28,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:22:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-04 12:22:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:22:28,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:28,125 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-10-04 12:22:28,126 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:28,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:28,126 INFO L82 PathProgramCache]: Analyzing trace with hash 877396373, now seen corresponding path program 22 times [2018-10-04 12:22:28,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:28,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:28,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:28,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:28,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:28,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:28,446 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 [2018-10-04 12:22:28,454 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:22:28,482 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:22:28,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:28,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:28,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:28,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-04 12:22:28,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:22:28,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:22:28,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:22:28,558 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-10-04 12:22:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:28,799 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-04 12:22:28,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:22:28,799 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-04 12:22:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:28,800 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:22:28,800 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:22:28,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:22:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:22:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-04 12:22:28,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:22:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-04 12:22:28,810 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-10-04 12:22:28,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:28,810 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-04 12:22:28,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:22:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-04 12:22:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:22:28,811 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:28,811 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-10-04 12:22:28,811 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:28,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:28,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1364257681, now seen corresponding path program 23 times [2018-10-04 12:22:28,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:28,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:28,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:28,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:28,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:29,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:29,268 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 [2018-10-04 12:22:29,277 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:22:29,317 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 12:22:29,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:29,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:29,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:29,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:22:29,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:22:29,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:22:29,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:22:29,350 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-10-04 12:22:29,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:29,880 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-04 12:22:29,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:22:29,881 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 12:22:29,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:29,882 INFO L225 Difference]: With dead ends: 86 [2018-10-04 12:22:29,882 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 12:22:29,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:22:29,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 12:22:29,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 12:22:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 12:22:29,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-04 12:22:29,890 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-10-04 12:22:29,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:29,890 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-04 12:22:29,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:22:29,890 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-04 12:22:29,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:22:29,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:29,891 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-10-04 12:22:29,891 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:29,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:29,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1897217739, now seen corresponding path program 24 times [2018-10-04 12:22:29,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:29,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:29,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:29,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:29,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:30,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:30,167 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 [2018-10-04 12:22:30,174 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:22:30,223 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-04 12:22:30,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:30,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:30,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:30,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-04 12:22:30,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:22:30,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:22:30,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:22:30,288 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-10-04 12:22:30,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:30,782 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-04 12:22:30,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:22:30,782 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-10-04 12:22:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:30,783 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:22:30,783 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:22:30,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:22:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:22:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-10-04 12:22:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:22:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-04 12:22:30,791 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-10-04 12:22:30,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:30,791 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-04 12:22:30,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:22:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-04 12:22:30,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:22:30,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:30,791 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-04 12:22:30,792 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:30,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2134920377, now seen corresponding path program 25 times [2018-10-04 12:22:30,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:30,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:30,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:30,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:30,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:32,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:32,185 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 [2018-10-04 12:22:32,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:32,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:32,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:32,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:22:32,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:22:32,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:22:32,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:22:32,268 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-10-04 12:22:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:33,069 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-04 12:22:33,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:22:33,069 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 12:22:33,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:33,070 INFO L225 Difference]: With dead ends: 92 [2018-10-04 12:22:33,070 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:22:33,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:22:33,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:22:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:22:33,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:22:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-04 12:22:33,078 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-10-04 12:22:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:33,078 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-04 12:22:33,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:22:33,078 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-04 12:22:33,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:22:33,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:33,079 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-10-04 12:22:33,079 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:33,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:33,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1286350463, now seen corresponding path program 26 times [2018-10-04 12:22:33,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:33,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:33,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:33,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:33,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:33,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:33,298 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 [2018-10-04 12:22:33,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:22:33,345 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:22:33,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:33,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:33,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:33,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-04 12:22:33,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:22:33,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:22:33,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:22:33,396 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-10-04 12:22:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:33,656 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-04 12:22:33,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:22:33,657 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-10-04 12:22:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:33,658 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:22:33,658 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:22:33,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:22:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:22:33,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-10-04 12:22:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:22:33,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-04 12:22:33,666 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-10-04 12:22:33,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:33,667 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-04 12:22:33,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:22:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-04 12:22:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:22:33,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:33,667 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-10-04 12:22:33,668 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:33,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:33,668 INFO L82 PathProgramCache]: Analyzing trace with hash 767719549, now seen corresponding path program 27 times [2018-10-04 12:22:33,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:33,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:33,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:33,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:33,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:34,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:34,508 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 [2018-10-04 12:22:34,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:22:34,560 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:22:34,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:34,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:34,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:34,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:22:34,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:22:34,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:22:34,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:22:34,594 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-10-04 12:22:35,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:35,114 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-04 12:22:35,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:22:35,114 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 12:22:35,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:35,115 INFO L225 Difference]: With dead ends: 98 [2018-10-04 12:22:35,115 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:22:35,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:22:35,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:22:35,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:22:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:22:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-04 12:22:35,126 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-10-04 12:22:35,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:35,126 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-04 12:22:35,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:22:35,126 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-04 12:22:35,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:22:35,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:35,127 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-10-04 12:22:35,127 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:35,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:35,128 INFO L82 PathProgramCache]: Analyzing trace with hash 285536695, now seen corresponding path program 28 times [2018-10-04 12:22:35,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:35,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:35,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:35,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:35,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:35,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:35,833 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 [2018-10-04 12:22:35,845 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:22:35,884 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:22:35,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:35,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:35,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:35,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-04 12:22:35,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:22:35,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:22:35,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:22:35,940 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-10-04 12:22:36,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:36,233 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-04 12:22:36,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:22:36,234 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-10-04 12:22:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:36,235 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:22:36,235 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:22:36,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:22:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:22:36,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-10-04 12:22:36,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:22:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-04 12:22:36,247 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-10-04 12:22:36,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:36,247 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-04 12:22:36,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:22:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-04 12:22:36,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:22:36,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:36,247 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-04 12:22:36,248 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:36,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:36,248 INFO L82 PathProgramCache]: Analyzing trace with hash -477209805, now seen corresponding path program 29 times [2018-10-04 12:22:36,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:36,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:36,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:36,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:36,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:36,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:36,782 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 [2018-10-04 12:22:36,803 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:22:37,004 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 12:22:37,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:37,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:37,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:37,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:22:37,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:22:37,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:22:37,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:22:37,039 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-10-04 12:22:37,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:37,963 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-04 12:22:37,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:22:37,963 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 12:22:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:37,964 INFO L225 Difference]: With dead ends: 104 [2018-10-04 12:22:37,964 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:22:37,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=609, Invalid=1841, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:22:37,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:22:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 12:22:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:22:37,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-04 12:22:37,974 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-04 12:22:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:37,974 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-04 12:22:37,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:22:37,974 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-04 12:22:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:22:37,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:37,975 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-10-04 12:22:37,975 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:37,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:37,975 INFO L82 PathProgramCache]: Analyzing trace with hash 35497837, now seen corresponding path program 30 times [2018-10-04 12:22:37,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:37,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:37,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:37,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:37,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:38,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:38,261 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 [2018-10-04 12:22:38,269 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:22:38,316 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-04 12:22:38,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:38,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:38,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:38,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-04 12:22:38,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:22:38,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:22:38,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:22:38,394 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-10-04 12:22:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:38,702 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-04 12:22:38,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:22:38,703 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-10-04 12:22:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:38,703 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:22:38,704 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 12:22:38,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:22:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 12:22:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-10-04 12:22:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:22:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-04 12:22:38,716 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-10-04 12:22:38,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:38,716 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-04 12:22:38,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:22:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-04 12:22:38,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:22:38,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:38,717 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-10-04 12:22:38,717 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:38,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash -246383767, now seen corresponding path program 31 times [2018-10-04 12:22:38,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:38,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:38,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:38,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:38,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:39,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:39,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:22:39,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:39,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:39,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:39,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:22:39,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:22:39,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:22:39,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:22:39,940 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-10-04 12:22:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:40,732 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-04 12:22:40,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:22:40,732 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 12:22:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:40,732 INFO L225 Difference]: With dead ends: 110 [2018-10-04 12:22:40,733 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 12:22:40,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:22:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 12:22:40,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 12:22:40,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:22:40,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-04 12:22:40,743 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-10-04 12:22:40,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:40,743 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-04 12:22:40,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:22:40,743 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-04 12:22:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:22:40,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:40,744 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-10-04 12:22:40,744 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:40,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:40,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1653283491, now seen corresponding path program 32 times [2018-10-04 12:22:40,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:40,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:40,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:40,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:40,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:41,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:41,223 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 [2018-10-04 12:22:41,230 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:22:41,274 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:22:41,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:41,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:41,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:41,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-04 12:22:41,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:22:41,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:22:41,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:22:41,333 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-10-04 12:22:41,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:41,666 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-04 12:22:41,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:22:41,666 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-10-04 12:22:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:41,667 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:22:41,667 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:22:41,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:22:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:22:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-04 12:22:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:22:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-04 12:22:41,677 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-04 12:22:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:41,678 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-04 12:22:41,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:22:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-04 12:22:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:22:41,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:41,678 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-04 12:22:41,678 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:41,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:41,679 INFO L82 PathProgramCache]: Analyzing trace with hash -332531425, now seen corresponding path program 33 times [2018-10-04 12:22:41,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:41,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:41,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:41,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:41,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:42,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:42,596 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 [2018-10-04 12:22:42,603 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:22:42,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 12:22:42,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:42,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:42,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:42,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:22:42,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:22:42,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:22:42,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:22:42,721 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-10-04 12:22:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:43,541 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-04 12:22:43,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:22:43,541 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 12:22:43,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:43,542 INFO L225 Difference]: With dead ends: 116 [2018-10-04 12:22:43,542 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:22:43,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:22:43,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:22:43,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 12:22:43,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 12:22:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-04 12:22:43,554 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-10-04 12:22:43,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:43,554 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-04 12:22:43,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:22:43,554 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-04 12:22:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 12:22:43,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:43,555 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-10-04 12:22:43,555 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:43,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:43,555 INFO L82 PathProgramCache]: Analyzing trace with hash -198022311, now seen corresponding path program 34 times [2018-10-04 12:22:43,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:43,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:43,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:43,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:43,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:43,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:43,993 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 [2018-10-04 12:22:44,000 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:22:44,043 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:22:44,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:44,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:44,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:44,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-04 12:22:44,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:22:44,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:22:44,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:22:44,102 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-10-04 12:22:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:44,541 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-04 12:22:44,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:22:44,541 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-10-04 12:22:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:44,541 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:22:44,542 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:22:44,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:22:44,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:22:44,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-10-04 12:22:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:22:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-04 12:22:44,555 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-10-04 12:22:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:44,556 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-04 12:22:44,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:22:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-04 12:22:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:22:44,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:44,557 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-10-04 12:22:44,557 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:44,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:44,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1320946603, now seen corresponding path program 35 times [2018-10-04 12:22:44,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:44,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:44,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:44,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:44,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:45,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:45,166 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 [2018-10-04 12:22:45,173 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:22:45,226 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 12:22:45,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:45,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:45,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:45,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:22:45,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:22:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:22:45,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:22:45,264 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-10-04 12:22:46,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:46,074 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-04 12:22:46,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:22:46,074 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 12:22:46,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:46,075 INFO L225 Difference]: With dead ends: 122 [2018-10-04 12:22:46,075 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 12:22:46,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:22:46,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 12:22:46,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 12:22:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 12:22:46,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-04 12:22:46,086 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-10-04 12:22:46,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:46,087 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-04 12:22:46,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:22:46,087 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-04 12:22:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 12:22:46,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:46,088 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-10-04 12:22:46,088 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:46,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:46,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1626388879, now seen corresponding path program 36 times [2018-10-04 12:22:46,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:46,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:46,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:46,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:46,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:46,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:46,484 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 [2018-10-04 12:22:46,491 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:22:46,714 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 12:22:46,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:46,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:46,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:46,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-04 12:22:46,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:22:46,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:22:46,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:22:46,787 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-10-04 12:22:47,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:47,243 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-04 12:22:47,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:22:47,243 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-10-04 12:22:47,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:47,244 INFO L225 Difference]: With dead ends: 89 [2018-10-04 12:22:47,244 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 12:22:47,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=739, Invalid=1241, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:22:47,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 12:22:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-10-04 12:22:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 12:22:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-04 12:22:47,260 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-10-04 12:22:47,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:47,261 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-04 12:22:47,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:22:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-04 12:22:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 12:22:47,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:47,261 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-04 12:22:47,262 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:47,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:47,262 INFO L82 PathProgramCache]: Analyzing trace with hash -408449781, now seen corresponding path program 37 times [2018-10-04 12:22:47,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:47,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:47,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:47,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:47,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:47,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:47,942 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 [2018-10-04 12:22:47,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:48,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:48,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:48,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:22:48,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:22:48,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:22:48,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:22:48,063 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-10-04 12:22:49,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:49,370 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-04 12:22:49,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:22:49,370 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 12:22:49,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:49,371 INFO L225 Difference]: With dead ends: 128 [2018-10-04 12:22:49,371 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 12:22:49,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=921, Invalid=2861, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:22:49,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 12:22:49,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 12:22:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 12:22:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-04 12:22:49,384 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-10-04 12:22:49,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:49,384 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-04 12:22:49,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:22:49,384 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-04 12:22:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 12:22:49,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:49,384 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-10-04 12:22:49,385 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:49,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:49,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1130683067, now seen corresponding path program 38 times [2018-10-04 12:22:49,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:49,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:49,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:49,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:49,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:49,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:49,854 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 [2018-10-04 12:22:49,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:22:49,910 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:22:49,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:49,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:49,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:49,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-04 12:22:49,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:22:49,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:22:49,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:22:49,991 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-10-04 12:22:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:50,534 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-04 12:22:50,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:22:50,534 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-10-04 12:22:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:50,535 INFO L225 Difference]: With dead ends: 93 [2018-10-04 12:22:50,535 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 12:22:50,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:22:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 12:22:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-10-04 12:22:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 12:22:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-04 12:22:50,549 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-10-04 12:22:50,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:50,549 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-04 12:22:50,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:22:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-04 12:22:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:22:50,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:50,550 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-10-04 12:22:50,550 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:50,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:50,550 INFO L82 PathProgramCache]: Analyzing trace with hash 40231745, now seen corresponding path program 39 times [2018-10-04 12:22:50,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:50,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:50,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:50,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:50,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:51,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:51,176 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 [2018-10-04 12:22:51,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:22:51,249 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 12:22:51,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:51,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:51,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:51,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:22:51,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:22:51,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:22:51,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:22:51,289 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-10-04 12:22:52,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:52,369 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-04 12:22:52,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:22:52,369 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 12:22:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:52,370 INFO L225 Difference]: With dead ends: 134 [2018-10-04 12:22:52,370 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 12:22:52,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:22:52,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 12:22:52,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 12:22:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 12:22:52,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-04 12:22:52,382 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-10-04 12:22:52,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:52,382 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-04 12:22:52,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:22:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-04 12:22:52,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 12:22:52,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:52,383 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-10-04 12:22:52,383 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:52,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:52,383 INFO L82 PathProgramCache]: Analyzing trace with hash -2030121349, now seen corresponding path program 40 times [2018-10-04 12:22:52,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:52,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:52,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:52,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:52,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:52,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:52,880 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 [2018-10-04 12:22:52,888 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:22:52,938 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:22:52,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:52,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:53,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:53,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-04 12:22:53,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:22:53,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:22:53,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:22:53,013 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-10-04 12:22:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:53,420 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-04 12:22:53,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:22:53,420 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-10-04 12:22:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:53,421 INFO L225 Difference]: With dead ends: 97 [2018-10-04 12:22:53,421 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 12:22:53,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:22:53,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 12:22:53,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-10-04 12:22:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:22:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-04 12:22:53,437 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-10-04 12:22:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:53,438 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-04 12:22:53,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:22:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-04 12:22:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 12:22:53,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:53,438 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-04 12:22:53,438 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:53,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:53,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1031530761, now seen corresponding path program 41 times [2018-10-04 12:22:53,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:53,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:53,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:53,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:53,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:54,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:54,354 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 [2018-10-04 12:22:54,361 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:22:54,424 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 12:22:54,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:54,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:54,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:54,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:22:54,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:22:54,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:22:54,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:22:54,469 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-10-04 12:22:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:55,123 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-04 12:22:55,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:22:55,123 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 12:22:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:55,124 INFO L225 Difference]: With dead ends: 140 [2018-10-04 12:22:55,124 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 12:22:55,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1101, Invalid=3455, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:22:55,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 12:22:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 12:22:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 12:22:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-04 12:22:55,139 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-04 12:22:55,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:55,139 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-04 12:22:55,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:22:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-04 12:22:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 12:22:55,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:55,140 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-10-04 12:22:55,140 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:55,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:55,140 INFO L82 PathProgramCache]: Analyzing trace with hash 769709361, now seen corresponding path program 42 times [2018-10-04 12:22:55,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:55,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:55,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:55,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:55,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:55,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:55,520 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 [2018-10-04 12:22:55,527 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:22:55,594 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-04 12:22:55,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:55,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:55,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:55,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-04 12:22:55,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:22:55,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:22:55,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:22:55,666 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-10-04 12:22:56,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:56,096 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-04 12:22:56,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:22:56,096 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-10-04 12:22:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:56,097 INFO L225 Difference]: With dead ends: 101 [2018-10-04 12:22:56,097 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 12:22:56,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:22:56,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 12:22:56,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-04 12:22:56,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 12:22:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-04 12:22:56,117 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-10-04 12:22:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:56,117 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-04 12:22:56,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:22:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-04 12:22:56,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 12:22:56,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:56,118 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-10-04 12:22:56,118 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:56,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:56,119 INFO L82 PathProgramCache]: Analyzing trace with hash 956254253, now seen corresponding path program 43 times [2018-10-04 12:22:56,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:56,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:56,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:56,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:22:56,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:56,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:56,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:22:57,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:57,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:57,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:57,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:22:57,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:22:57,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:22:57,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:22:57,103 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-10-04 12:22:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:22:58,454 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-04 12:22:58,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:22:58,454 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 12:22:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:22:58,455 INFO L225 Difference]: With dead ends: 146 [2018-10-04 12:22:58,455 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 12:22:58,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1197, Invalid=3773, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:22:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 12:22:58,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 12:22:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 12:22:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-04 12:22:58,476 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-10-04 12:22:58,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:22:58,476 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-04 12:22:58,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:22:58,476 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-04 12:22:58,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 12:22:58,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:22:58,477 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-10-04 12:22:58,477 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:22:58,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:22:58,477 INFO L82 PathProgramCache]: Analyzing trace with hash 251550055, now seen corresponding path program 44 times [2018-10-04 12:22:58,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:22:58,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:22:58,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:58,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:22:58,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:22:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:22:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:59,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:22:59,242 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 [2018-10-04 12:22:59,249 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:22:59,313 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:22:59,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:22:59,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:22:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:22:59,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:22:59,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-04 12:22:59,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:22:59,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:22:59,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:22:59,769 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-10-04 12:23:00,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:00,540 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-04 12:23:00,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:23:00,540 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-10-04 12:23:00,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:00,541 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:23:00,541 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 12:23:00,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:23:00,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 12:23:00,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-10-04 12:23:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 12:23:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-04 12:23:00,562 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-04 12:23:00,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:00,562 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-04 12:23:00,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:23:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-04 12:23:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:23:00,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:00,563 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-04 12:23:00,563 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:00,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:00,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1221367523, now seen corresponding path program 45 times [2018-10-04 12:23:00,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:00,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:00,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:00,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:00,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:04,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:04,472 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 [2018-10-04 12:23:04,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:23:04,550 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 12:23:04,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:04,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:04,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:04,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:23:04,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:23:04,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:23:04,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:23:04,606 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-10-04 12:23:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:05,858 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-04 12:23:05,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:23:05,858 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 12:23:05,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:05,859 INFO L225 Difference]: With dead ends: 152 [2018-10-04 12:23:05,859 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 12:23:05,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1297, Invalid=4105, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:23:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 12:23:05,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 12:23:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:23:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-04 12:23:05,880 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-10-04 12:23:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:05,880 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-04 12:23:05,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:23:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-04 12:23:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 12:23:05,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:05,881 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-10-04 12:23:05,881 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:05,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:05,882 INFO L82 PathProgramCache]: Analyzing trace with hash -99845347, now seen corresponding path program 46 times [2018-10-04 12:23:05,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:05,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:05,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:05,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:05,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:06,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:06,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:23:06,291 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:23:06,352 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:23:06,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:06,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:06,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:06,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-04 12:23:06,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:23:06,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:23:06,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:23:06,408 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-10-04 12:23:07,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:07,217 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-04 12:23:07,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:23:07,217 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-10-04 12:23:07,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:07,218 INFO L225 Difference]: With dead ends: 109 [2018-10-04 12:23:07,218 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 12:23:07,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:23:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 12:23:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-10-04 12:23:07,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 12:23:07,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-04 12:23:07,236 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-10-04 12:23:07,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:07,236 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-04 12:23:07,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:23:07,237 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-04 12:23:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 12:23:07,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:07,237 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-10-04 12:23:07,238 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:07,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:07,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1462164711, now seen corresponding path program 47 times [2018-10-04 12:23:07,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:07,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:07,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:07,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:07,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:08,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:08,772 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 [2018-10-04 12:23:08,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:23:08,873 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 12:23:08,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:08,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:08,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:08,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:23:08,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:23:08,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:23:08,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:23:08,927 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-10-04 12:23:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:10,267 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-04 12:23:10,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:23:10,267 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 12:23:10,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:10,268 INFO L225 Difference]: With dead ends: 158 [2018-10-04 12:23:10,268 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 12:23:10,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1401, Invalid=4451, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:23:10,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 12:23:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 12:23:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 12:23:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-04 12:23:10,293 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-10-04 12:23:10,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:10,293 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-04 12:23:10,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:23:10,293 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-04 12:23:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 12:23:10,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:10,294 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-10-04 12:23:10,294 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:10,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:10,295 INFO L82 PathProgramCache]: Analyzing trace with hash 850942547, now seen corresponding path program 48 times [2018-10-04 12:23:10,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:10,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:10,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:10,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:10,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:11,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:11,100 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 [2018-10-04 12:23:11,106 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:23:11,227 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-04 12:23:11,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:11,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:11,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:11,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-04 12:23:11,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:23:11,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:23:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:23:11,396 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-10-04 12:23:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:11,948 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-04 12:23:11,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:23:11,948 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-10-04 12:23:11,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:11,949 INFO L225 Difference]: With dead ends: 113 [2018-10-04 12:23:11,949 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 12:23:11,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:23:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 12:23:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-10-04 12:23:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 12:23:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-04 12:23:11,971 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-10-04 12:23:11,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:11,971 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-04 12:23:11,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:23:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-04 12:23:11,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 12:23:11,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:11,972 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-04 12:23:11,972 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:11,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:11,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1711934671, now seen corresponding path program 49 times [2018-10-04 12:23:11,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:11,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:11,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:11,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:11,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:13,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:13,157 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 [2018-10-04 12:23:13,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:23:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:13,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:13,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:13,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:23:13,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:23:13,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:23:13,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:23:13,291 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-10-04 12:23:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:14,988 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-04 12:23:14,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:23:14,988 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 12:23:14,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:14,989 INFO L225 Difference]: With dead ends: 164 [2018-10-04 12:23:14,989 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 12:23:14,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1509, Invalid=4811, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:23:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 12:23:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 12:23:15,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 12:23:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-04 12:23:15,008 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-10-04 12:23:15,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:15,008 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-04 12:23:15,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:23:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-04 12:23:15,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 12:23:15,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:15,009 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-10-04 12:23:15,009 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:15,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:15,009 INFO L82 PathProgramCache]: Analyzing trace with hash -223930615, now seen corresponding path program 50 times [2018-10-04 12:23:15,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:15,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:15,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:15,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:23:15,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:15,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:15,954 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 [2018-10-04 12:23:15,963 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:23:16,025 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:23:16,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:16,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:16,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:16,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-04 12:23:16,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:23:16,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:23:16,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:23:16,119 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-10-04 12:23:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:16,649 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-04 12:23:16,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:23:16,650 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-10-04 12:23:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:16,651 INFO L225 Difference]: With dead ends: 117 [2018-10-04 12:23:16,651 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 12:23:16,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:23:16,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 12:23:16,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-10-04 12:23:16,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 12:23:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-04 12:23:16,670 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-10-04 12:23:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:16,670 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-04 12:23:16,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:23:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-04 12:23:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 12:23:16,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:16,671 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-10-04 12:23:16,671 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:16,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:16,671 INFO L82 PathProgramCache]: Analyzing trace with hash -449022971, now seen corresponding path program 51 times [2018-10-04 12:23:16,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:16,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:16,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:16,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:16,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:17,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:17,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:23:17,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:23:17,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 12:23:17,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:17,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:17,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:17,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:23:17,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:23:17,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:23:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:23:17,847 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-10-04 12:23:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:19,395 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-04 12:23:19,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:23:19,395 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 12:23:19,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:19,396 INFO L225 Difference]: With dead ends: 170 [2018-10-04 12:23:19,396 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 12:23:19,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:23:19,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 12:23:19,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 12:23:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 12:23:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-04 12:23:19,415 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-10-04 12:23:19,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:19,415 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-04 12:23:19,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:23:19,415 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-04 12:23:19,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 12:23:19,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:19,416 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-10-04 12:23:19,416 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:19,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:19,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1802883391, now seen corresponding path program 52 times [2018-10-04 12:23:19,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:19,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:19,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:19,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:19,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:19,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:19,868 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 [2018-10-04 12:23:19,875 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:23:19,940 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:23:19,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:19,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:20,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:20,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-04 12:23:20,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:23:20,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:23:20,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:23:20,213 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-10-04 12:23:20,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:20,989 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-04 12:23:20,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:23:20,989 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-10-04 12:23:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:20,990 INFO L225 Difference]: With dead ends: 121 [2018-10-04 12:23:20,991 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 12:23:20,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 12:23:20,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 12:23:21,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-04 12:23:21,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 12:23:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-04 12:23:21,011 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-10-04 12:23:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:21,011 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-04 12:23:21,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:23:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-04 12:23:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 12:23:21,012 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:21,012 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-04 12:23:21,013 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:21,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:21,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1699051707, now seen corresponding path program 53 times [2018-10-04 12:23:21,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:21,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:21,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:21,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:21,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:22,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:22,068 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 [2018-10-04 12:23:22,076 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:23:22,161 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 12:23:22,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:22,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:22,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:22,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:23:22,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:23:22,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:23:22,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:23:22,220 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-10-04 12:23:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:23,791 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-04 12:23:23,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:23:23,791 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 12:23:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:23,792 INFO L225 Difference]: With dead ends: 176 [2018-10-04 12:23:23,792 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 12:23:23,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1737, Invalid=5573, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:23:23,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 12:23:23,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-04 12:23:23,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 12:23:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-04 12:23:23,815 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-04 12:23:23,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:23,815 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-04 12:23:23,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:23:23,815 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-04 12:23:23,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 12:23:23,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:23,816 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-10-04 12:23:23,816 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:23,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:23,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1220126965, now seen corresponding path program 54 times [2018-10-04 12:23:23,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:23,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:23,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:23,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:23,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:24,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:24,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:23:24,334 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:23:24,421 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-04 12:23:24,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:24,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:24,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:24,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-04 12:23:24,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:23:24,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:23:24,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:23:24,730 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-10-04 12:23:25,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:25,311 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-04 12:23:25,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:23:25,311 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-10-04 12:23:25,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:25,313 INFO L225 Difference]: With dead ends: 125 [2018-10-04 12:23:25,313 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 12:23:25,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 12:23:25,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 12:23:25,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-04 12:23:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 12:23:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-04 12:23:25,334 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-10-04 12:23:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:25,334 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-04 12:23:25,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:23:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-04 12:23:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 12:23:25,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:25,335 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-10-04 12:23:25,335 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:25,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:25,335 INFO L82 PathProgramCache]: Analyzing trace with hash 15874801, now seen corresponding path program 55 times [2018-10-04 12:23:25,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:25,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:25,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:25,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:25,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:26,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:26,610 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 [2018-10-04 12:23:26,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:23:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:26,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:26,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:26,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 12:23:26,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:23:26,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:23:26,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:23:26,741 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-10-04 12:23:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:29,833 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-10-04 12:23:29,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:23:29,833 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-04 12:23:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:29,834 INFO L225 Difference]: With dead ends: 182 [2018-10-04 12:23:29,834 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 12:23:29,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1857, Invalid=5975, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 12:23:29,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 12:23:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 12:23:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 12:23:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-04 12:23:29,860 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-10-04 12:23:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:29,861 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-04 12:23:29,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:23:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-04 12:23:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-04 12:23:29,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:29,862 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-10-04 12:23:29,862 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:29,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:29,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1308639701, now seen corresponding path program 56 times [2018-10-04 12:23:29,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:29,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:29,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:29,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:23:29,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:30,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:30,637 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 [2018-10-04 12:23:30,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:23:30,712 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:23:30,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:30,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:31,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:31,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-04 12:23:31,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:23:31,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:23:31,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:23:31,018 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-10-04 12:23:31,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:31,665 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-10-04 12:23:31,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:23:31,666 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-10-04 12:23:31,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:31,666 INFO L225 Difference]: With dead ends: 129 [2018-10-04 12:23:31,666 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 12:23:31,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:23:31,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 12:23:31,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-10-04 12:23:31,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-04 12:23:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-04 12:23:31,690 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-04 12:23:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:31,690 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-04 12:23:31,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:23:31,691 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-04 12:23:31,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 12:23:31,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:31,691 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-04 12:23:31,691 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:31,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:31,692 INFO L82 PathProgramCache]: Analyzing trace with hash 822598311, now seen corresponding path program 57 times [2018-10-04 12:23:31,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:31,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:31,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:31,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:31,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:32,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:32,988 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 [2018-10-04 12:23:32,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:23:33,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 12:23:33,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:33,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:33,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:33,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 12:23:33,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:23:33,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:23:33,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:23:33,181 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 62 states. [2018-10-04 12:23:35,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:35,126 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-04 12:23:35,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:23:35,126 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-04 12:23:35,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:35,127 INFO L225 Difference]: With dead ends: 188 [2018-10-04 12:23:35,127 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 12:23:35,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1981, Invalid=6391, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:23:35,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 12:23:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-04 12:23:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 12:23:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-04 12:23:35,157 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-10-04 12:23:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:35,157 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-04 12:23:35,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:23:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-04 12:23:35,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-04 12:23:35,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:35,158 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-10-04 12:23:35,158 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:35,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash -858967839, now seen corresponding path program 58 times [2018-10-04 12:23:35,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:35,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:35,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:35,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:35,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:35,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:35,673 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 [2018-10-04 12:23:35,684 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:23:35,761 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:23:35,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:35,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:35,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:35,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-04 12:23:35,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:23:35,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:23:35,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:23:35,940 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-10-04 12:23:36,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:36,587 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-04 12:23:36,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:23:36,587 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-10-04 12:23:36,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:36,588 INFO L225 Difference]: With dead ends: 133 [2018-10-04 12:23:36,588 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 12:23:36,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:23:36,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 12:23:36,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-10-04 12:23:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 12:23:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-04 12:23:36,613 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-10-04 12:23:36,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:36,613 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-04 12:23:36,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:23:36,613 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-04 12:23:36,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-04 12:23:36,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:36,614 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-10-04 12:23:36,614 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:36,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:36,614 INFO L82 PathProgramCache]: Analyzing trace with hash -834439203, now seen corresponding path program 59 times [2018-10-04 12:23:36,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:36,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:36,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:36,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:36,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:37,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:37,764 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 [2018-10-04 12:23:37,773 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:23:37,871 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 12:23:37,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:37,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:37,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:37,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 12:23:37,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:23:37,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:23:37,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:23:37,917 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 64 states. [2018-10-04 12:23:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:40,091 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-10-04 12:23:40,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:23:40,091 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-04 12:23:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:40,092 INFO L225 Difference]: With dead ends: 194 [2018-10-04 12:23:40,092 INFO L226 Difference]: Without dead ends: 129 [2018-10-04 12:23:40,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2109, Invalid=6821, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 12:23:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-04 12:23:40,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-04 12:23:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 12:23:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-04 12:23:40,115 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-10-04 12:23:40,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:40,115 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-04 12:23:40,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:23:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-04 12:23:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 12:23:40,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:40,116 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-10-04 12:23:40,116 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:40,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:40,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1096867561, now seen corresponding path program 60 times [2018-10-04 12:23:40,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:40,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:40,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:40,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:40,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:40,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:40,723 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 [2018-10-04 12:23:40,732 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:23:40,833 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-04 12:23:40,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:40,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:40,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:40,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-04 12:23:40,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:23:40,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:23:40,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:23:40,917 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-10-04 12:23:41,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:41,589 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-10-04 12:23:41,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:23:41,589 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-10-04 12:23:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:41,590 INFO L225 Difference]: With dead ends: 137 [2018-10-04 12:23:41,590 INFO L226 Difference]: Without dead ends: 135 [2018-10-04 12:23:41,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 12:23:41,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-04 12:23:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-10-04 12:23:41,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 12:23:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-04 12:23:41,616 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-10-04 12:23:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:41,616 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-04 12:23:41,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:23:41,616 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-04 12:23:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-04 12:23:41,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:41,617 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-04 12:23:41,617 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:41,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:41,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1822805357, now seen corresponding path program 61 times [2018-10-04 12:23:41,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:41,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:41,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:41,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:41,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:42,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:42,936 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 [2018-10-04 12:23:42,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:23:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:43,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:43,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:43,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 12:23:43,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:23:43,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:23:43,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:23:43,079 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 66 states. [2018-10-04 12:23:45,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:45,405 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-10-04 12:23:45,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:23:45,406 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-04 12:23:45,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:45,406 INFO L225 Difference]: With dead ends: 200 [2018-10-04 12:23:45,406 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 12:23:45,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2241, Invalid=7265, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:23:45,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 12:23:45,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-04 12:23:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 12:23:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-04 12:23:45,432 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-10-04 12:23:45,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:45,432 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-04 12:23:45,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:23:45,432 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-04 12:23:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 12:23:45,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:45,433 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-10-04 12:23:45,433 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:45,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:45,433 INFO L82 PathProgramCache]: Analyzing trace with hash 787132109, now seen corresponding path program 62 times [2018-10-04 12:23:45,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:45,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:45,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:45,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:23:45,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:45,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:45,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:23:45,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:23:46,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:23:46,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:46,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:46,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:46,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-04 12:23:46,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:23:46,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:23:46,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:23:46,317 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-10-04 12:23:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:47,094 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-10-04 12:23:47,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:23:47,094 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-10-04 12:23:47,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:47,096 INFO L225 Difference]: With dead ends: 141 [2018-10-04 12:23:47,096 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 12:23:47,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:23:47,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 12:23:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-04 12:23:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 12:23:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-04 12:23:47,122 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-10-04 12:23:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:47,123 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-04 12:23:47,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:23:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-04 12:23:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 12:23:47,123 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:47,124 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-10-04 12:23:47,124 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:47,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:47,124 INFO L82 PathProgramCache]: Analyzing trace with hash 519645897, now seen corresponding path program 63 times [2018-10-04 12:23:47,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:47,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:47,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:47,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:47,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:48,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:48,506 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 [2018-10-04 12:23:48,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:23:48,627 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 12:23:48,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:48,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:48,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:48,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 12:23:48,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:23:48,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:23:48,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:23:48,682 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 68 states. [2018-10-04 12:23:50,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:50,975 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-10-04 12:23:50,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:23:50,975 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-04 12:23:50,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:50,976 INFO L225 Difference]: With dead ends: 206 [2018-10-04 12:23:50,976 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 12:23:50,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2377, Invalid=7723, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 12:23:50,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 12:23:51,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-04 12:23:51,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-04 12:23:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-10-04 12:23:51,001 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-10-04 12:23:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:51,001 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-10-04 12:23:51,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:23:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-10-04 12:23:51,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-04 12:23:51,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:51,002 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-10-04 12:23:51,002 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:51,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:51,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635779, now seen corresponding path program 64 times [2018-10-04 12:23:51,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:51,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:51,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:51,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:51,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:51,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:51,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:23:51,590 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:23:51,674 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:23:51,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:51,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:51,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:51,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-04 12:23:51,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:23:51,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:23:51,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:23:51,843 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-10-04 12:23:52,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:52,579 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-04 12:23:52,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:23:52,579 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-10-04 12:23:52,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:52,580 INFO L225 Difference]: With dead ends: 145 [2018-10-04 12:23:52,580 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 12:23:52,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 12:23:52,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 12:23:52,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-10-04 12:23:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 12:23:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-04 12:23:52,607 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-10-04 12:23:52,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:52,608 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-04 12:23:52,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:23:52,608 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-04 12:23:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 12:23:52,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:52,609 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-04 12:23:52,609 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:52,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:52,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1975877759, now seen corresponding path program 65 times [2018-10-04 12:23:52,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:52,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:52,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:52,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:52,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:54,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:54,437 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 [2018-10-04 12:23:54,452 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:23:54,580 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 12:23:54,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:54,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:54,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:54,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 12:23:54,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:23:54,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:23:54,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:23:54,641 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 70 states. [2018-10-04 12:23:57,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:57,006 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-04 12:23:57,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:23:57,007 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-04 12:23:57,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:57,007 INFO L225 Difference]: With dead ends: 212 [2018-10-04 12:23:57,007 INFO L226 Difference]: Without dead ends: 141 [2018-10-04 12:23:57,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2517, Invalid=8195, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 12:23:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-04 12:23:57,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-04 12:23:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-04 12:23:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-04 12:23:57,035 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-04 12:23:57,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:57,035 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-04 12:23:57,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:23:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-04 12:23:57,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 12:23:57,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:57,036 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-10-04 12:23:57,036 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:57,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:57,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1050354361, now seen corresponding path program 66 times [2018-10-04 12:23:57,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:57,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:57,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:57,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:57,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:23:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:57,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:23:57,626 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 [2018-10-04 12:23:57,634 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:23:57,745 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-04 12:23:57,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:23:57,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:23:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:23:57,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:23:57,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-04 12:23:57,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:23:57,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:23:57,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:23:57,836 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-10-04 12:23:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:23:58,647 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-10-04 12:23:58,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:23:58,647 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-10-04 12:23:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:23:58,648 INFO L225 Difference]: With dead ends: 149 [2018-10-04 12:23:58,648 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 12:23:58,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 12:23:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 12:23:58,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-10-04 12:23:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 12:23:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-04 12:23:58,678 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-10-04 12:23:58,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:23:58,678 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-04 12:23:58,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:23:58,678 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-04 12:23:58,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 12:23:58,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:23:58,679 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-10-04 12:23:58,679 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:23:58,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:23:58,679 INFO L82 PathProgramCache]: Analyzing trace with hash 73159605, now seen corresponding path program 67 times [2018-10-04 12:23:58,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:23:58,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:23:58,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:58,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:23:58,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:23:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:00,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:00,395 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 [2018-10-04 12:24:00,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:24:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:00,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:00,535 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:00,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 12:24:00,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:24:00,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:24:00,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 12:24:00,536 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 72 states. [2018-10-04 12:24:03,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:03,033 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-10-04 12:24:03,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:24:03,033 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-04 12:24:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:03,034 INFO L225 Difference]: With dead ends: 218 [2018-10-04 12:24:03,034 INFO L226 Difference]: Without dead ends: 145 [2018-10-04 12:24:03,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2661, Invalid=8681, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 12:24:03,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-04 12:24:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-04 12:24:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 12:24:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-04 12:24:03,066 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-10-04 12:24:03,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:03,066 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-04 12:24:03,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:24:03,066 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-04 12:24:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-04 12:24:03,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:03,067 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-10-04 12:24:03,067 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:03,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:03,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1220692207, now seen corresponding path program 68 times [2018-10-04 12:24:03,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:03,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:03,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:03,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:24:03,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:03,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:03,767 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 [2018-10-04 12:24:03,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:24:03,859 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:24:03,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:24:03,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:04,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:04,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-04 12:24:04,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:24:04,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:24:04,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:24:04,151 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-10-04 12:24:05,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:05,011 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-10-04 12:24:05,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:24:05,011 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-10-04 12:24:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:05,012 INFO L225 Difference]: With dead ends: 153 [2018-10-04 12:24:05,012 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 12:24:05,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:24:05,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 12:24:05,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-10-04 12:24:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 12:24:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-04 12:24:05,052 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-04 12:24:05,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:05,052 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-04 12:24:05,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:24:05,052 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-04 12:24:05,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 12:24:05,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:05,053 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-04 12:24:05,053 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:05,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:05,053 INFO L82 PathProgramCache]: Analyzing trace with hash 559072363, now seen corresponding path program 69 times [2018-10-04 12:24:05,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:05,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:05,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:05,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:24:05,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:06,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:06,528 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 [2018-10-04 12:24:06,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:24:06,663 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 12:24:06,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:24:06,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:06,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:06,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 12:24:06,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:24:06,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:24:06,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:24:06,715 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 74 states. [2018-10-04 12:24:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:09,612 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-10-04 12:24:09,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 12:24:09,612 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-04 12:24:09,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:09,613 INFO L225 Difference]: With dead ends: 224 [2018-10-04 12:24:09,613 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 12:24:09,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2809, Invalid=9181, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 12:24:09,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 12:24:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-04 12:24:09,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 12:24:09,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-10-04 12:24:09,649 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-10-04 12:24:09,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:09,649 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-10-04 12:24:09,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:24:09,649 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-10-04 12:24:09,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 12:24:09,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:09,650 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-10-04 12:24:09,650 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:09,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:09,651 INFO L82 PathProgramCache]: Analyzing trace with hash 719817893, now seen corresponding path program 70 times [2018-10-04 12:24:09,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:09,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:09,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:09,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:24:09,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:10,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:10,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:24:10,375 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:24:10,468 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:24:10,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:24:10,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:10,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:10,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-04 12:24:10,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:24:10,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:24:10,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:24:10,560 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-10-04 12:24:11,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:11,456 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-04 12:24:11,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:24:11,457 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-10-04 12:24:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:11,458 INFO L225 Difference]: With dead ends: 157 [2018-10-04 12:24:11,458 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 12:24:11,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 12:24:11,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 12:24:11,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-10-04 12:24:11,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 12:24:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-04 12:24:11,491 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-10-04 12:24:11,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:11,492 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-04 12:24:11,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:24:11,492 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-04 12:24:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-04 12:24:11,493 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:11,493 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-10-04 12:24:11,493 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:11,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:11,493 INFO L82 PathProgramCache]: Analyzing trace with hash 255193761, now seen corresponding path program 71 times [2018-10-04 12:24:11,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:11,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:11,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:11,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:24:11,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:13,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:13,156 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 [2018-10-04 12:24:13,163 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:24:13,293 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 12:24:13,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:24:13,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:13,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:13,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 12:24:13,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 12:24:13,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 12:24:13,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 12:24:13,348 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 76 states. [2018-10-04 12:24:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:16,380 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-10-04 12:24:16,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 12:24:16,380 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-04 12:24:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:16,382 INFO L225 Difference]: With dead ends: 230 [2018-10-04 12:24:16,382 INFO L226 Difference]: Without dead ends: 153 [2018-10-04 12:24:16,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2961, Invalid=9695, Unknown=0, NotChecked=0, Total=12656 [2018-10-04 12:24:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-04 12:24:16,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-04 12:24:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-04 12:24:16,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-04 12:24:16,420 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-10-04 12:24:16,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:16,420 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-04 12:24:16,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 12:24:16,420 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-04 12:24:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 12:24:16,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:16,421 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-10-04 12:24:16,421 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:16,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:16,422 INFO L82 PathProgramCache]: Analyzing trace with hash 878185947, now seen corresponding path program 72 times [2018-10-04 12:24:16,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:16,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:16,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:16,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:24:16,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:17,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:17,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:24:17,162 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:24:17,293 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-04 12:24:17,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:24:17,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:17,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:17,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-10-04 12:24:17,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:24:17,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:24:17,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:24:17,449 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-10-04 12:24:18,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:18,350 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-10-04 12:24:18,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 12:24:18,351 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-10-04 12:24:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:18,352 INFO L225 Difference]: With dead ends: 161 [2018-10-04 12:24:18,352 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 12:24:18,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2422, Invalid=4058, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 12:24:18,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 12:24:18,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-04 12:24:18,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 12:24:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-04 12:24:18,385 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-10-04 12:24:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:18,385 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-04 12:24:18,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:24:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-04 12:24:18,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-04 12:24:18,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:18,386 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-04 12:24:18,386 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:18,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:18,387 INFO L82 PathProgramCache]: Analyzing trace with hash 2123038295, now seen corresponding path program 73 times [2018-10-04 12:24:18,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:18,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:18,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:18,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:24:18,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:20,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:20,483 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 [2018-10-04 12:24:20,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:24:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:20,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:20,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:20,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 12:24:20,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 12:24:20,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 12:24:20,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 12:24:20,631 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 78 states. [2018-10-04 12:24:23,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:23,565 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-10-04 12:24:23,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 12:24:23,565 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-04 12:24:23,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:23,566 INFO L225 Difference]: With dead ends: 236 [2018-10-04 12:24:23,566 INFO L226 Difference]: Without dead ends: 157 [2018-10-04 12:24:23,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3117, Invalid=10223, Unknown=0, NotChecked=0, Total=13340 [2018-10-04 12:24:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-04 12:24:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-04 12:24:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 12:24:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-04 12:24:23,599 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-10-04 12:24:23,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:23,599 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-04 12:24:23,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 12:24:23,599 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-04 12:24:23,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 12:24:23,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:23,600 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-10-04 12:24:23,600 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:23,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:23,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1034359663, now seen corresponding path program 74 times [2018-10-04 12:24:23,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:23,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:23,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:23,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:24:23,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:24,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:24,472 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 [2018-10-04 12:24:24,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:24:24,572 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:24:24,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:24:24,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:24,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:24,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-04 12:24:24,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:24:24,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:24:24,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:24:24,707 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-10-04 12:24:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:25,644 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-10-04 12:24:25,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 12:24:25,645 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-10-04 12:24:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:25,646 INFO L225 Difference]: With dead ends: 165 [2018-10-04 12:24:25,646 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 12:24:25,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:24:25,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 12:24:25,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-10-04 12:24:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-04 12:24:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-04 12:24:25,692 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-10-04 12:24:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:25,692 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-04 12:24:25,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:24:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-04 12:24:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 12:24:25,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:25,693 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-10-04 12:24:25,693 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:25,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:25,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1882257523, now seen corresponding path program 75 times [2018-10-04 12:24:25,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:25,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:25,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:25,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:24:25,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:27,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:27,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:24:27,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:24:27,621 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 12:24:27,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:24:27,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:27,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:27,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 12:24:27,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:24:27,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:24:27,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4681, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:24:27,674 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 80 states. [2018-10-04 12:24:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:31,025 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-10-04 12:24:31,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 12:24:31,025 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-04 12:24:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:31,026 INFO L225 Difference]: With dead ends: 242 [2018-10-04 12:24:31,026 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 12:24:31,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3277, Invalid=10765, Unknown=0, NotChecked=0, Total=14042 [2018-10-04 12:24:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 12:24:31,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-04 12:24:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 12:24:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-04 12:24:31,065 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-10-04 12:24:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:31,065 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-04 12:24:31,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:24:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-04 12:24:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 12:24:31,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:31,066 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-10-04 12:24:31,066 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:31,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:31,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1109870791, now seen corresponding path program 76 times [2018-10-04 12:24:31,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:31,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:31,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:31,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:24:31,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:31,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:31,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:24:31,813 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:24:31,904 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:24:31,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:24:31,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:31,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:31,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-04 12:24:31,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:24:31,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:24:31,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:24:31,989 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-10-04 12:24:32,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:32,925 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-04 12:24:32,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 12:24:32,926 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-10-04 12:24:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:32,927 INFO L225 Difference]: With dead ends: 169 [2018-10-04 12:24:32,927 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 12:24:32,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2669, Invalid=4471, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 12:24:32,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 12:24:32,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-10-04 12:24:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 12:24:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-04 12:24:32,966 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-10-04 12:24:32,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:32,966 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-04 12:24:32,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:24:32,966 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-04 12:24:32,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 12:24:32,967 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:32,967 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-04 12:24:32,967 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:32,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:32,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1433873987, now seen corresponding path program 77 times [2018-10-04 12:24:32,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:32,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:32,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:32,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:24:32,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:35,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:35,065 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 [2018-10-04 12:24:35,073 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:24:35,211 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 12:24:35,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:24:35,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:35,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:35,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 12:24:35,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 12:24:35,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 12:24:35,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 12:24:35,275 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 82 states. [2018-10-04 12:24:38,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:38,704 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-10-04 12:24:38,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 12:24:38,705 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-04 12:24:38,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:38,705 INFO L225 Difference]: With dead ends: 248 [2018-10-04 12:24:38,705 INFO L226 Difference]: Without dead ends: 165 [2018-10-04 12:24:38,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3441, Invalid=11321, Unknown=0, NotChecked=0, Total=14762 [2018-10-04 12:24:38,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-04 12:24:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-04 12:24:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-04 12:24:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-04 12:24:38,739 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-10-04 12:24:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:38,739 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-04 12:24:38,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 12:24:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-04 12:24:38,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 12:24:38,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:38,740 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-10-04 12:24:38,740 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:38,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:38,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1292352899, now seen corresponding path program 78 times [2018-10-04 12:24:38,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:38,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:38,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:38,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:24:38,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:39,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:39,682 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 [2018-10-04 12:24:39,689 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:24:39,842 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-04 12:24:39,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:24:39,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:39,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:39,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-04 12:24:39,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:24:39,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:24:39,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:24:39,970 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-10-04 12:24:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:41,012 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-10-04 12:24:41,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 12:24:41,012 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-10-04 12:24:41,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:41,013 INFO L225 Difference]: With dead ends: 173 [2018-10-04 12:24:41,013 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 12:24:41,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 12:24:41,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 12:24:41,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-10-04 12:24:41,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 12:24:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-10-04 12:24:41,055 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-10-04 12:24:41,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:41,055 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-10-04 12:24:41,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:24:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-10-04 12:24:41,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 12:24:41,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:41,056 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-10-04 12:24:41,056 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:41,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash -705654151, now seen corresponding path program 79 times [2018-10-04 12:24:41,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:41,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:41,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:41,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:24:41,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:43,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:43,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:24:43,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:24:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:43,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:43,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:43,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 12:24:43,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 12:24:43,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 12:24:43,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=5167, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 12:24:43,683 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 84 states. [2018-10-04 12:24:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:47,393 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-10-04 12:24:47,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 12:24:47,393 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-04 12:24:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:47,394 INFO L225 Difference]: With dead ends: 254 [2018-10-04 12:24:47,394 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 12:24:47,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3609, Invalid=11891, Unknown=0, NotChecked=0, Total=15500 [2018-10-04 12:24:47,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 12:24:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-04 12:24:47,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 12:24:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-10-04 12:24:47,434 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-10-04 12:24:47,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:47,434 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-10-04 12:24:47,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 12:24:47,434 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-10-04 12:24:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 12:24:47,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:47,435 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-10-04 12:24:47,435 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:47,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:47,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1476855373, now seen corresponding path program 80 times [2018-10-04 12:24:47,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:47,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:47,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:47,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:24:47,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:48,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:48,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:24:48,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:24:48,378 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:24:48,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:24:48,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:48,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:48,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-10-04 12:24:48,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:24:48,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:24:48,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:24:48,475 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2018-10-04 12:24:49,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:49,529 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-10-04 12:24:49,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 12:24:49,529 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2018-10-04 12:24:49,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:49,530 INFO L225 Difference]: With dead ends: 177 [2018-10-04 12:24:49,530 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 12:24:49,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2928, Invalid=4904, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 12:24:49,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 12:24:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-10-04 12:24:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 12:24:49,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-04 12:24:49,570 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-10-04 12:24:49,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:49,571 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-04 12:24:49,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:24:49,571 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-04 12:24:49,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 12:24:49,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:49,571 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-10-04 12:24:49,572 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:49,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:49,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1918872529, now seen corresponding path program 81 times [2018-10-04 12:24:49,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:49,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:49,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:49,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:24:49,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:51,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:51,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:24:51,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:24:52,027 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 12:24:52,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:24:52,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:52,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:52,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 12:24:52,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 12:24:52,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 12:24:52,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:24:52,103 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 86 states. [2018-10-04 12:24:55,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:55,903 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-10-04 12:24:55,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 12:24:55,903 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-04 12:24:55,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:55,904 INFO L225 Difference]: With dead ends: 260 [2018-10-04 12:24:55,904 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 12:24:55,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3781, Invalid=12475, Unknown=0, NotChecked=0, Total=16256 [2018-10-04 12:24:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 12:24:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-04 12:24:55,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 12:24:55,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-10-04 12:24:55,945 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-10-04 12:24:55,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:55,945 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-10-04 12:24:55,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 12:24:55,945 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-10-04 12:24:55,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 12:24:55,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:55,946 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-10-04 12:24:55,946 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:55,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:55,946 INFO L82 PathProgramCache]: Analyzing trace with hash -900821399, now seen corresponding path program 82 times [2018-10-04 12:24:55,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:55,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:55,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:55,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:24:55,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:24:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:56,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:24:56,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:24:56,820 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:24:56,928 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:24:56,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:24:56,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:24:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:24:57,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:24:57,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-10-04 12:24:57,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:24:57,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:24:57,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:24:57,022 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-10-04 12:24:58,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:24:58,110 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-10-04 12:24:58,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 12:24:58,110 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-10-04 12:24:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:24:58,111 INFO L225 Difference]: With dead ends: 181 [2018-10-04 12:24:58,111 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 12:24:58,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 12:24:58,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 12:24:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-10-04 12:24:58,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 12:24:58,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-10-04 12:24:58,155 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2018-10-04 12:24:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:24:58,155 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-10-04 12:24:58,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:24:58,155 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-10-04 12:24:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 12:24:58,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:24:58,156 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-10-04 12:24:58,156 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:24:58,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:24:58,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1893962597, now seen corresponding path program 83 times [2018-10-04 12:24:58,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:24:58,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:24:58,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:58,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:24:58,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:24:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:00,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:00,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:00,346 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:25:00,502 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 12:25:00,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:25:00,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:00,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:00,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 12:25:00,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 12:25:00,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 12:25:00,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=5677, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 12:25:00,559 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 88 states. [2018-10-04 12:25:02,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:25:02,740 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2018-10-04 12:25:02,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 12:25:02,740 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-04 12:25:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:25:02,741 INFO L225 Difference]: With dead ends: 266 [2018-10-04 12:25:02,741 INFO L226 Difference]: Without dead ends: 177 [2018-10-04 12:25:02,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3957, Invalid=13073, Unknown=0, NotChecked=0, Total=17030 [2018-10-04 12:25:02,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-04 12:25:02,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-04 12:25:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-04 12:25:02,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-10-04 12:25:02,784 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2018-10-04 12:25:02,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:25:02,784 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-10-04 12:25:02,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 12:25:02,784 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-10-04 12:25:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-04 12:25:02,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:25:02,785 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-10-04 12:25:02,785 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:25:02,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:25:02,786 INFO L82 PathProgramCache]: Analyzing trace with hash -619306849, now seen corresponding path program 84 times [2018-10-04 12:25:02,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:25:02,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:25:02,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:02,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:25:02,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:03,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:03,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:03,670 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:25:03,833 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-04 12:25:03,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:25:03,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:03,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:03,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-10-04 12:25:03,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:25:03,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:25:03,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:25:03,935 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 49 states. [2018-10-04 12:25:05,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:25:05,004 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-10-04 12:25:05,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 12:25:05,004 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2018-10-04 12:25:05,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:25:05,005 INFO L225 Difference]: With dead ends: 185 [2018-10-04 12:25:05,005 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 12:25:05,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3199, Invalid=5357, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 12:25:05,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 12:25:05,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-10-04 12:25:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-04 12:25:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-10-04 12:25:05,049 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-10-04 12:25:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:25:05,050 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-10-04 12:25:05,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:25:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-10-04 12:25:05,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 12:25:05,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:25:05,051 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-10-04 12:25:05,051 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:25:05,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:25:05,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1846505499, now seen corresponding path program 85 times [2018-10-04 12:25:05,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:25:05,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:25:05,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:05,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:25:05,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:07,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:07,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:07,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:25:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:07,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:07,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:07,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 12:25:07,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 12:25:07,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 12:25:07,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 12:25:07,731 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 90 states. [2018-10-04 12:25:10,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:25:10,152 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2018-10-04 12:25:10,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 12:25:10,152 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-04 12:25:10,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:25:10,153 INFO L225 Difference]: With dead ends: 272 [2018-10-04 12:25:10,153 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 12:25:10,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4137, Invalid=13685, Unknown=0, NotChecked=0, Total=17822 [2018-10-04 12:25:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 12:25:10,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 12:25:10,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 12:25:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-10-04 12:25:10,196 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-10-04 12:25:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:25:10,196 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-10-04 12:25:10,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 12:25:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-10-04 12:25:10,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-04 12:25:10,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:25:10,197 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-10-04 12:25:10,197 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:25:10,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:25:10,198 INFO L82 PathProgramCache]: Analyzing trace with hash 895799381, now seen corresponding path program 86 times [2018-10-04 12:25:10,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:25:10,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:25:10,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:10,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:25:10,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:11,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:11,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:11,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:25:11,499 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:25:11,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:25:11,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:11,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:11,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-10-04 12:25:11,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:25:11,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:25:11,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:25:11,598 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-10-04 12:25:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:25:12,723 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2018-10-04 12:25:12,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 12:25:12,724 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-10-04 12:25:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:25:12,725 INFO L225 Difference]: With dead ends: 189 [2018-10-04 12:25:12,725 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 12:25:12,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 12:25:12,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 12:25:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2018-10-04 12:25:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-04 12:25:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-10-04 12:25:12,771 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2018-10-04 12:25:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:25:12,771 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-10-04 12:25:12,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:25:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-10-04 12:25:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 12:25:12,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:25:12,772 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-10-04 12:25:12,772 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:25:12,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:25:12,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1869679185, now seen corresponding path program 87 times [2018-10-04 12:25:12,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:25:12,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:25:12,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:12,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:25:12,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:15,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:15,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:15,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:25:15,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-04 12:25:15,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:25:15,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:15,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:15,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 12:25:15,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 12:25:15,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 12:25:15,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 12:25:15,352 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 92 states. [2018-10-04 12:25:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:25:18,529 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2018-10-04 12:25:18,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 12:25:18,529 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-04 12:25:18,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:25:18,530 INFO L225 Difference]: With dead ends: 278 [2018-10-04 12:25:18,530 INFO L226 Difference]: Without dead ends: 185 [2018-10-04 12:25:18,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4321, Invalid=14311, Unknown=0, NotChecked=0, Total=18632 [2018-10-04 12:25:18,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-04 12:25:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-04 12:25:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 12:25:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-10-04 12:25:18,586 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2018-10-04 12:25:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:25:18,586 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-10-04 12:25:18,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 12:25:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-10-04 12:25:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-04 12:25:18,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:25:18,587 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-10-04 12:25:18,587 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:25:18,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:25:18,587 INFO L82 PathProgramCache]: Analyzing trace with hash -800604789, now seen corresponding path program 88 times [2018-10-04 12:25:18,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:25:18,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:25:18,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:18,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:25:18,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:19,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:19,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:19,549 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:25:19,665 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:25:19,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:25:19,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:19,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:19,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2018-10-04 12:25:19,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:25:19,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:25:19,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:25:19,767 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 51 states. [2018-10-04 12:25:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:25:21,136 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-10-04 12:25:21,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 12:25:21,136 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 184 [2018-10-04 12:25:21,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:25:21,137 INFO L225 Difference]: With dead ends: 193 [2018-10-04 12:25:21,137 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 12:25:21,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3482, Invalid=5830, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 12:25:21,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 12:25:21,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2018-10-04 12:25:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-04 12:25:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-10-04 12:25:21,189 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-10-04 12:25:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:25:21,190 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-10-04 12:25:21,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:25:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-10-04 12:25:21,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-04 12:25:21,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:25:21,190 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-10-04 12:25:21,191 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:25:21,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:25:21,191 INFO L82 PathProgramCache]: Analyzing trace with hash -582123001, now seen corresponding path program 89 times [2018-10-04 12:25:21,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:25:21,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:25:21,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:21,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:25:21,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:23,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:23,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:23,617 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:25:23,790 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 12:25:23,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:25:23,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:23,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:23,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 12:25:23,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 12:25:23,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 12:25:23,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 12:25:23,852 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 94 states. [2018-10-04 12:25:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:25:25,792 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2018-10-04 12:25:25,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 12:25:25,792 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-04 12:25:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:25:25,794 INFO L225 Difference]: With dead ends: 284 [2018-10-04 12:25:25,794 INFO L226 Difference]: Without dead ends: 189 [2018-10-04 12:25:25,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4509, Invalid=14951, Unknown=0, NotChecked=0, Total=19460 [2018-10-04 12:25:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-04 12:25:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-04 12:25:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-04 12:25:25,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-10-04 12:25:25,843 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-10-04 12:25:25,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:25:25,843 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-10-04 12:25:25,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 12:25:25,843 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-10-04 12:25:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 12:25:25,844 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:25:25,844 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-10-04 12:25:25,844 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:25:25,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:25:25,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1060894655, now seen corresponding path program 90 times [2018-10-04 12:25:25,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:25:25,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:25:25,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:25,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:25:25,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:27,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:27,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:27,024 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:25:27,199 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-10-04 12:25:27,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:25:27,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:27,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:27,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-10-04 12:25:27,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:25:27,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:25:27,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:25:27,301 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-10-04 12:25:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:25:28,542 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2018-10-04 12:25:28,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 12:25:28,542 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-10-04 12:25:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:25:28,543 INFO L225 Difference]: With dead ends: 197 [2018-10-04 12:25:28,543 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 12:25:28,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3628, Invalid=6074, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 12:25:28,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 12:25:28,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2018-10-04 12:25:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 12:25:28,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-10-04 12:25:28,592 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2018-10-04 12:25:28,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:25:28,592 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-10-04 12:25:28,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:25:28,592 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-10-04 12:25:28,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-04 12:25:28,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:25:28,593 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-10-04 12:25:28,593 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:25:28,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:25:28,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1612581059, now seen corresponding path program 91 times [2018-10-04 12:25:28,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:25:28,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:25:28,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:28,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:25:28,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:31,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:31,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:31,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:25:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:31,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:31,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:31,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 12:25:31,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 12:25:31,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 12:25:31,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 12:25:31,588 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 96 states. [2018-10-04 12:25:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:25:34,944 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2018-10-04 12:25:34,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 12:25:34,944 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-04 12:25:34,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:25:34,945 INFO L225 Difference]: With dead ends: 290 [2018-10-04 12:25:34,945 INFO L226 Difference]: Without dead ends: 193 [2018-10-04 12:25:34,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4701, Invalid=15605, Unknown=0, NotChecked=0, Total=20306 [2018-10-04 12:25:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-04 12:25:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-04 12:25:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-04 12:25:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-10-04 12:25:34,994 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2018-10-04 12:25:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:25:34,994 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-10-04 12:25:34,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 12:25:34,994 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-10-04 12:25:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-04 12:25:34,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:25:34,995 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-10-04 12:25:34,995 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:25:34,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:25:34,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1003933815, now seen corresponding path program 92 times [2018-10-04 12:25:34,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:25:34,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:25:34,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:34,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:25:34,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:36,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:36,040 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:36,047 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:25:36,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:25:36,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:25:36,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:36,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:36,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2018-10-04 12:25:36,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:25:36,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:25:36,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:25:36,282 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 53 states. [2018-10-04 12:25:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:25:37,609 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2018-10-04 12:25:37,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 12:25:37,609 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 192 [2018-10-04 12:25:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:25:37,610 INFO L225 Difference]: With dead ends: 201 [2018-10-04 12:25:37,610 INFO L226 Difference]: Without dead ends: 199 [2018-10-04 12:25:37,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3777, Invalid=6323, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 12:25:37,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-04 12:25:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-10-04 12:25:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-04 12:25:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-10-04 12:25:37,662 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-10-04 12:25:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:25:37,662 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-10-04 12:25:37,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:25:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-10-04 12:25:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-04 12:25:37,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:25:37,663 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-10-04 12:25:37,663 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:25:37,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:25:37,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1587312141, now seen corresponding path program 93 times [2018-10-04 12:25:37,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:25:37,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:25:37,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:37,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:25:37,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:40,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:40,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:40,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:25:40,554 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-04 12:25:40,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:25:40,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:40,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:40,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 12:25:40,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 12:25:40,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 12:25:40,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:25:40,619 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 98 states. [2018-10-04 12:25:44,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:25:44,282 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2018-10-04 12:25:44,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 12:25:44,282 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-04 12:25:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:25:44,283 INFO L225 Difference]: With dead ends: 296 [2018-10-04 12:25:44,283 INFO L226 Difference]: Without dead ends: 197 [2018-10-04 12:25:44,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4897, Invalid=16273, Unknown=0, NotChecked=0, Total=21170 [2018-10-04 12:25:44,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-04 12:25:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-04 12:25:44,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-04 12:25:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-10-04 12:25:44,334 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-10-04 12:25:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:25:44,334 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-10-04 12:25:44,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 12:25:44,334 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-10-04 12:25:44,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-04 12:25:44,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:25:44,335 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-10-04 12:25:44,335 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:25:44,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:25:44,336 INFO L82 PathProgramCache]: Analyzing trace with hash 410334765, now seen corresponding path program 94 times [2018-10-04 12:25:44,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:25:44,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:25:44,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:44,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:25:44,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:45,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:45,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:45,428 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:25:45,554 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:25:45,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:25:45,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:45,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:45,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-10-04 12:25:45,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:25:45,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:25:45,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:25:45,664 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-10-04 12:25:47,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:25:47,230 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-10-04 12:25:47,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 12:25:47,231 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-10-04 12:25:47,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:25:47,232 INFO L225 Difference]: With dead ends: 205 [2018-10-04 12:25:47,232 INFO L226 Difference]: Without dead ends: 203 [2018-10-04 12:25:47,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 12:25:47,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-04 12:25:47,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-10-04 12:25:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-04 12:25:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-10-04 12:25:47,285 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2018-10-04 12:25:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:25:47,286 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-10-04 12:25:47,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:25:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-10-04 12:25:47,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-04 12:25:47,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:25:47,286 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-10-04 12:25:47,287 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:25:47,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:25:47,287 INFO L82 PathProgramCache]: Analyzing trace with hash -805348823, now seen corresponding path program 95 times [2018-10-04 12:25:47,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:25:47,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:25:47,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:47,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:25:47,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:49,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:49,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:49,970 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:25:50,164 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 12:25:50,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:25:50,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:50,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:50,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 12:25:50,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 12:25:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 12:25:50,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=7351, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 12:25:50,229 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 100 states. [2018-10-04 12:25:53,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:25:53,879 INFO L93 Difference]: Finished difference Result 302 states and 304 transitions. [2018-10-04 12:25:53,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 12:25:53,879 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-10-04 12:25:53,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:25:53,880 INFO L225 Difference]: With dead ends: 302 [2018-10-04 12:25:53,880 INFO L226 Difference]: Without dead ends: 201 [2018-10-04 12:25:53,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5097, Invalid=16955, Unknown=0, NotChecked=0, Total=22052 [2018-10-04 12:25:53,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-04 12:25:53,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-04 12:25:53,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-04 12:25:53,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-10-04 12:25:53,932 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2018-10-04 12:25:53,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:25:53,932 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-10-04 12:25:53,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 12:25:53,932 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-10-04 12:25:53,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-04 12:25:53,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:25:53,933 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-10-04 12:25:53,933 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:25:53,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:25:53,933 INFO L82 PathProgramCache]: Analyzing trace with hash -779331229, now seen corresponding path program 96 times [2018-10-04 12:25:53,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:25:53,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:25:53,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:53,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:25:53,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:55,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:55,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:55,059 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:25:55,252 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-04 12:25:55,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:25:55,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:55,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:55,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2018-10-04 12:25:55,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:25:55,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:25:55,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:25:55,364 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 55 states. [2018-10-04 12:25:56,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:25:56,834 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2018-10-04 12:25:56,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 12:25:56,834 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 200 [2018-10-04 12:25:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:25:56,835 INFO L225 Difference]: With dead ends: 209 [2018-10-04 12:25:56,835 INFO L226 Difference]: Without dead ends: 207 [2018-10-04 12:25:56,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4084, Invalid=6836, Unknown=0, NotChecked=0, Total=10920 [2018-10-04 12:25:56,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-04 12:25:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-10-04 12:25:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-04 12:25:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-10-04 12:25:56,885 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-10-04 12:25:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:25:56,885 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-10-04 12:25:56,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:25:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-10-04 12:25:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-04 12:25:56,886 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:25:56,886 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-10-04 12:25:56,886 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:25:56,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:25:56,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1613068321, now seen corresponding path program 97 times [2018-10-04 12:25:56,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:25:56,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:25:56,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:56,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:25:56,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:25:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:59,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:25:59,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:25:59,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:25:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:25:59,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:25:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:25:59,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:25:59,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-04 12:25:59,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 12:25:59,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 12:25:59,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 12:25:59,878 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 102 states. [2018-10-04 12:26:03,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:03,802 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2018-10-04 12:26:03,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 12:26:03,802 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-10-04 12:26:03,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:03,803 INFO L225 Difference]: With dead ends: 308 [2018-10-04 12:26:03,803 INFO L226 Difference]: Without dead ends: 205 [2018-10-04 12:26:03,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5301, Invalid=17651, Unknown=0, NotChecked=0, Total=22952 [2018-10-04 12:26:03,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-04 12:26:03,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-04 12:26:03,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-04 12:26:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2018-10-04 12:26:03,858 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2018-10-04 12:26:03,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:03,858 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2018-10-04 12:26:03,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 12:26:03,859 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2018-10-04 12:26:03,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-04 12:26:03,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:03,859 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 1, 1, 1, 1] [2018-10-04 12:26:03,860 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:03,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:03,860 INFO L82 PathProgramCache]: Analyzing trace with hash 134306329, now seen corresponding path program 98 times [2018-10-04 12:26:03,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:03,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:03,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:03,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:26:03,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:26:05,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:05,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:26:05,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Received shutdown request... [2018-10-04 12:26:05,248 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:26:05,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:26:05,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:05,254 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-04 12:26:05,455 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:26:05,455 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:26:05,461 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:26:05,461 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:26:05 BoogieIcfgContainer [2018-10-04 12:26:05,461 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:26:05,462 INFO L168 Benchmark]: Toolchain (without parser) took 234474.40 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -28.3 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 214.9 MB). Peak memory consumption was 186.6 MB. Max. memory is 7.1 GB. [2018-10-04 12:26:05,463 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-10-04 12:26:05,463 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.62 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. [2018-10-04 12:26:05,463 INFO L168 Benchmark]: Boogie Preprocessor took 21.89 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. [2018-10-04 12:26:05,464 INFO L168 Benchmark]: RCFGBuilder took 372.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:26:05,464 INFO L168 Benchmark]: TraceAbstraction took 234034.12 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -28.3 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 193.8 MB). Peak memory consumption was 165.5 MB. Max. memory is 7.1 GB. [2018-10-04 12:26:05,466 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 0.20 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 41.62 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 21.89 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 372.64 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234034.12 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -28.3 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 193.8 MB). Peak memory consumption was 165.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was analyzing trace of length 205 with TraceHistMax 51, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 233.9s OverallTime, 100 OverallIterations, 51 TraceHistogramMax, 117.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1672 SDtfs, 1101 SDslu, 7882 SDs, 0 SdLazy, 75671 SolverSat, 5590 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 45.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17930 GetRequests, 11412 SyntacticMatches, 0 SemanticMatches, 6518 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105444 ImplicationChecksByTransitivity, 147.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=205occurred in iteration=99, 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: 2.2s AutomataMinimizationTime, 99 MinimizatonAttempts, 196 StatesRemovedByMinimization, 49 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.4s SsaConstructionTime, 8.1s SatisfiabilityAnalysisTime, 98.2s InterpolantComputationTime, 20578 NumberOfCodeBlocks, 20578 NumberOfCodeBlocksAsserted, 1452 NumberOfCheckSat, 20382 ConstructedInterpolants, 0 QuantifiedInterpolants, 8225930 SizeOfPredicates, 291 NumberOfNonLiveVariables, 40644 ConjunctsInSsa, 5382 ConjunctsInUnsatCore, 196 InterpolantComputations, 2 PerfectInterpolantSequences, 166598/328298 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-26-05-476.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-26-05-476.csv Completed graceful shutdown