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 0.1.23-2eb0a67 [2018-10-03 08:43:10,588 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:43:10,590 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:43:10,601 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:43:10,602 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:43:10,603 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:43:10,604 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:43:10,607 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:43:10,608 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:43:10,609 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:43:10,610 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-03 08:43:10,633 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 [2018-10-03 08:43:10,658 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:43:10,659 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:43:10,659 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:43:10,660 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:43:10,661 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:43:10,661 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:43:10,661 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:43:10,662 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:43:10,662 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:43:10,662 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:43:10,662 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:43:10,663 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:43:10,663 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:43:10,664 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:43:10,664 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:43:10,664 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:43:10,664 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:43:10,664 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:43:10,665 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:43:10,665 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:43:10,665 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:43:10,665 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:43:10,666 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:43:10,667 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:43:10,667 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:43:10,667 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:43:10,667 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:43:10,667 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:43:10,668 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:43:10,668 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:43:10,738 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:43:10,754 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:43:10,759 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:43:10,761 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:43:10,762 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:43:10,762 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl [2018-10-03 08:43:10,763 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl' [2018-10-03 08:43:10,827 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:43:10,830 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:43:10,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:43:10,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:43:10,831 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:43:10,852 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 03.10 08:43:10" (1/1) ... [2018-10-03 08:43:10,865 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 03.10 08:43:10" (1/1) ... [2018-10-03 08:43:10,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:43:10,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:43:10,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:43:10,872 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:43:10,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:43:10" (1/1) ... [2018-10-03 08:43:10,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:43:10" (1/1) ... [2018-10-03 08:43:10,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:43:10" (1/1) ... [2018-10-03 08:43:10,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:43:10" (1/1) ... [2018-10-03 08:43:10,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:43:10" (1/1) ... [2018-10-03 08:43:10,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:43:10" (1/1) ... [2018-10-03 08:43:10,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:43:10" (1/1) ... [2018-10-03 08:43:10,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:43:10,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:43:10,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:43:10,893 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:43:10,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:43:10" (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 [2018-10-03 08:43:10,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 08:43:10,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 08:43:11,269 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 08:43:11,270 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:43:11 BoogieIcfgContainer [2018-10-03 08:43:11,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:43:11,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:43:11,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:43:11,274 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:43:11,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:43:10" (1/2) ... [2018-10-03 08:43:11,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66801a84 and model type down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:43:11, skipping insertion in model container [2018-10-03 08:43:11,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:43:11" (2/2) ... [2018-10-03 08:43:11,278 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bpl [2018-10-03 08:43:11,288 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:43:11,296 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:43:11,348 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:43:11,348 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:43:11,349 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:43:11,349 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:43:11,349 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:43:11,349 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:43:11,349 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:43:11,350 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:43:11,350 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:43:11,364 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-03 08:43:11,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:43:11,371 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:11,372 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-03 08:43:11,373 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:11,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:11,379 INFO L82 PathProgramCache]: Analyzing trace with hash 889539593, now seen corresponding path program 1 times [2018-10-03 08:43:11,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:11,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:11,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:11,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:11,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:11,590 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:43:11,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-03 08:43:11,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:43:11,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:43:11,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:43:11,609 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-10-03 08:43:11,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:11,849 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-10-03 08:43:11,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:43:11,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-03 08:43:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:11,863 INFO L225 Difference]: With dead ends: 16 [2018-10-03 08:43:11,863 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:43:11,868 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 [2018-10-03 08:43:11,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:43:11,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 08:43:11,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:43:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-03 08:43:11,902 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-03 08:43:11,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:11,902 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-03 08:43:11,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:43:11,903 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-03 08:43:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:43:11,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:11,903 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-03 08:43:11,903 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:11,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:11,904 INFO L82 PathProgramCache]: Analyzing trace with hash 198622019, now seen corresponding path program 1 times [2018-10-03 08:43:11,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:11,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:11,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:11,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:11,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:12,007 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:43:12,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-03 08:43:12,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:43:12,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:43:12,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:43:12,010 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-03 08:43:12,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:12,097 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-03 08:43:12,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:43:12,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-03 08:43:12,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:12,099 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:43:12,099 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:43:12,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:43:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:43:12,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-10-03 08:43:12,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:43:12,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-03 08:43:12,104 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-03 08:43:12,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:12,104 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-03 08:43:12,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:43:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-03 08:43:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:43:12,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:12,106 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-03 08:43:12,106 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:12,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:12,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1897132479, now seen corresponding path program 1 times [2018-10-03 08:43:12,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:12,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:12,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:12,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:12,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:12,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:12,218 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 [2018-10-03 08:43:12,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:12,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:12,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:12,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:43:12,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:43:12,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:43:12,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:43:12,310 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-10-03 08:43:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:12,506 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-03 08:43:12,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:43:12,507 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-03 08:43:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:12,508 INFO L225 Difference]: With dead ends: 20 [2018-10-03 08:43:12,508 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:43:12,509 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 [2018-10-03 08:43:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:43:12,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 08:43:12,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:43:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-03 08:43:12,513 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-03 08:43:12,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:12,514 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-03 08:43:12,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:43:12,514 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-03 08:43:12,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:43:12,515 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:12,515 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-03 08:43:12,515 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:12,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:12,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1765329927, now seen corresponding path program 2 times [2018-10-03 08:43:12,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:12,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:12,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:12,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:12,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:12,889 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-03 08:43:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:12,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:12,929 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 [2018-10-03 08:43:12,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:12,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:12,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:12,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:13,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:13,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-03 08:43:13,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:43:13,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:43:13,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:43:13,026 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-03 08:43:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:13,197 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-03 08:43:13,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:43:13,197 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-03 08:43:13,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:13,198 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:43:13,199 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:43:13,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:43:13,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:43:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-03 08:43:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:43:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-03 08:43:13,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-10-03 08:43:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:13,205 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-03 08:43:13,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:43:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-03 08:43:13,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:43:13,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:13,206 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-03 08:43:13,207 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:13,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:13,207 INFO L82 PathProgramCache]: Analyzing trace with hash 29955317, now seen corresponding path program 3 times [2018-10-03 08:43:13,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:13,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:13,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:13,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:13,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:13,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:13,340 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 [2018-10-03 08:43:13,354 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:13,410 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 08:43:13,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:13,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:13,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:13,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:43:13,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:43:13,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:43:13,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:43:13,457 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-10-03 08:43:13,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:13,632 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-03 08:43:13,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:43:13,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-03 08:43:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:13,633 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:43:13,634 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:43:13,634 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 [2018-10-03 08:43:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:43:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 08:43:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 08:43:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-03 08:43:13,639 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-10-03 08:43:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:13,640 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-03 08:43:13,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:43:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-03 08:43:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:43:13,641 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:13,641 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-10-03 08:43:13,641 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:13,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:13,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1153652177, now seen corresponding path program 4 times [2018-10-03 08:43:13,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:13,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:13,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:13,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:13,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:13,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:13,999 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 [2018-10-03 08:43:14,015 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:14,040 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:14,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:14,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:14,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:14,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-03 08:43:14,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:43:14,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:43:14,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:43:14,105 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-03 08:43:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:14,251 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-03 08:43:14,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:43:14,253 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-03 08:43:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:14,253 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:43:14,254 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:43:14,254 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 [2018-10-03 08:43:14,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:43:14,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-03 08:43:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:43:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-03 08:43:14,260 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-10-03 08:43:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:14,260 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-03 08:43:14,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:43:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-03 08:43:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:43:14,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:14,261 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-03 08:43:14,262 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:14,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:14,262 INFO L82 PathProgramCache]: Analyzing trace with hash -558246485, now seen corresponding path program 5 times [2018-10-03 08:43:14,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:14,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:14,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:14,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:14,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:14,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:14,411 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 [2018-10-03 08:43:14,420 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:14,438 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 08:43:14,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:14,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:14,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:14,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:43:14,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:43:14,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:43:14,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:43:14,474 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-10-03 08:43:14,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:14,629 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-03 08:43:14,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:43:14,630 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-03 08:43:14,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:14,631 INFO L225 Difference]: With dead ends: 32 [2018-10-03 08:43:14,631 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:43:14,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:43:14,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:43:14,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 08:43:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:43:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-03 08:43:14,637 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-03 08:43:14,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:14,637 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-03 08:43:14,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:43:14,637 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-03 08:43:14,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:43:14,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:14,638 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-10-03 08:43:14,639 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:14,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:14,639 INFO L82 PathProgramCache]: Analyzing trace with hash -578011675, now seen corresponding path program 6 times [2018-10-03 08:43:14,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:14,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:14,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:14,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:14,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:14,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:14,814 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 [2018-10-03 08:43:14,830 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:14,914 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-03 08:43:14,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:14,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:15,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:15,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-03 08:43:15,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:43:15,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:43:15,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:43:15,065 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-10-03 08:43:15,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:15,260 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-03 08:43:15,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:43:15,260 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-03 08:43:15,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:15,262 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:43:15,262 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:43:15,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:43:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:43:15,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-10-03 08:43:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:43:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-03 08:43:15,269 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-10-03 08:43:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:15,269 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-03 08:43:15,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:43:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-03 08:43:15,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:43:15,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:15,270 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-10-03 08:43:15,271 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:15,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:15,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1418505247, now seen corresponding path program 7 times [2018-10-03 08:43:15,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:15,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:15,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:15,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:15,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:15,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:15,410 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 [2018-10-03 08:43:15,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:15,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:15,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:15,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:43:15,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:43:15,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:43:15,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:43:15,479 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-10-03 08:43:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:15,630 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-03 08:43:15,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:43:15,631 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-03 08:43:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:15,631 INFO L225 Difference]: With dead ends: 38 [2018-10-03 08:43:15,631 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:43:15,632 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 [2018-10-03 08:43:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:43:15,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 08:43:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:43:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-03 08:43:15,639 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-10-03 08:43:15,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:15,640 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-03 08:43:15,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:43:15,640 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-03 08:43:15,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:43:15,641 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:15,641 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-10-03 08:43:15,642 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:15,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:15,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1375531237, now seen corresponding path program 8 times [2018-10-03 08:43:15,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:15,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:15,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:15,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:15,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:15,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:15,790 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 [2018-10-03 08:43:15,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:15,844 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:15,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:15,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:15,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:15,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-03 08:43:15,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:43:15,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:43:15,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:43:15,916 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-10-03 08:43:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:16,231 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-03 08:43:16,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:43:16,231 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-10-03 08:43:16,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:16,232 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:43:16,232 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:43:16,233 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 [2018-10-03 08:43:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:43:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-10-03 08:43:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:43:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-03 08:43:16,239 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-03 08:43:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:16,240 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-03 08:43:16,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:43:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-03 08:43:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:43:16,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:16,241 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-03 08:43:16,241 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:16,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:16,242 INFO L82 PathProgramCache]: Analyzing trace with hash 964341655, now seen corresponding path program 9 times [2018-10-03 08:43:16,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:16,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:16,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:16,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:16,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:16,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:16,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:16,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:16,632 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:43:16,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:16,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:16,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:16,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:43:16,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:43:16,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:43:16,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:43:16,669 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-10-03 08:43:16,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:16,853 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-03 08:43:16,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:43:16,853 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-03 08:43:16,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:16,854 INFO L225 Difference]: With dead ends: 44 [2018-10-03 08:43:16,854 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:43:16,855 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 [2018-10-03 08:43:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:43:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 08:43:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:43:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-03 08:43:16,862 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-10-03 08:43:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:16,862 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-03 08:43:16,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:43:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-03 08:43:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:43:16,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:16,864 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-10-03 08:43:16,864 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:16,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:16,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1427751471, now seen corresponding path program 10 times [2018-10-03 08:43:16,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:16,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:16,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:16,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:16,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:17,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:17,030 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 [2018-10-03 08:43:17,038 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:17,056 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:17,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:17,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:17,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:17,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-03 08:43:17,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:43:17,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:43:17,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:43:17,118 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-10-03 08:43:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:17,300 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-03 08:43:17,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:43:17,301 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-03 08:43:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:17,303 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:43:17,303 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:43:17,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:43:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:43:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-10-03 08:43:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:43:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-03 08:43:17,312 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-10-03 08:43:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:17,312 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-03 08:43:17,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:43:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-03 08:43:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:43:17,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:17,313 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-10-03 08:43:17,313 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:17,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:17,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1974662963, now seen corresponding path program 11 times [2018-10-03 08:43:17,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:17,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:17,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:17,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:17,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:17,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:17,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:17,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:17,830 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:43:17,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:17,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:17,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:17,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:43:17,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:43:17,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:43:17,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:43:17,870 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-10-03 08:43:18,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:18,665 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-03 08:43:18,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:43:18,666 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-03 08:43:18,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:18,666 INFO L225 Difference]: With dead ends: 50 [2018-10-03 08:43:18,666 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:43:18,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:43:18,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:43:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 08:43:18,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 08:43:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-03 08:43:18,674 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-10-03 08:43:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:18,675 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-03 08:43:18,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:43:18,675 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-03 08:43:18,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:43:18,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:18,676 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-10-03 08:43:18,676 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:18,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:18,676 INFO L82 PathProgramCache]: Analyzing trace with hash 577956359, now seen corresponding path program 12 times [2018-10-03 08:43:18,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:18,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:18,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:18,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:18,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:18,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:18,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:18,951 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:19,063 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:43:19,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:19,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:19,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:19,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-03 08:43:19,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:43:19,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:43:19,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:43:19,180 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-10-03 08:43:19,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:19,342 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-03 08:43:19,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:43:19,342 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-10-03 08:43:19,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:19,343 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:43:19,343 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:43:19,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:43:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:43:19,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-03 08:43:19,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:43:19,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-03 08:43:19,351 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-10-03 08:43:19,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:19,352 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-03 08:43:19,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:43:19,352 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-03 08:43:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:43:19,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:19,353 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-03 08:43:19,353 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:19,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1365213059, now seen corresponding path program 13 times [2018-10-03 08:43:19,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:19,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:19,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:19,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:19,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:19,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:19,535 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 [2018-10-03 08:43:19,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:19,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:19,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:19,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:43:19,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:43:19,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:43:19,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:43:19,596 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-10-03 08:43:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:20,337 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-03 08:43:20,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:43:20,337 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-03 08:43:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:20,337 INFO L225 Difference]: With dead ends: 56 [2018-10-03 08:43:20,337 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:43:20,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:43:20,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:43:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 08:43:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 08:43:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-03 08:43:20,344 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-10-03 08:43:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:20,345 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-03 08:43:20,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:43:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-03 08:43:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:43:20,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:20,346 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-10-03 08:43:20,346 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:20,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:20,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1260506179, now seen corresponding path program 14 times [2018-10-03 08:43:20,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:20,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:20,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:20,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:20,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:20,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:20,481 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 [2018-10-03 08:43:20,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:20,520 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:20,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:20,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:20,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:20,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-03 08:43:20,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:43:20,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:43:20,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:43:20,624 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-10-03 08:43:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:20,777 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-03 08:43:20,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:43:20,778 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-10-03 08:43:20,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:20,779 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:43:20,779 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:43:20,780 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 [2018-10-03 08:43:20,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:43:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-10-03 08:43:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:43:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-03 08:43:20,790 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-10-03 08:43:20,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:20,790 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-03 08:43:20,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:43:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-03 08:43:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:43:20,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:20,792 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-10-03 08:43:20,792 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:20,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:20,792 INFO L82 PathProgramCache]: Analyzing trace with hash -165727303, now seen corresponding path program 15 times [2018-10-03 08:43:20,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:20,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:20,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:20,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:20,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:21,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:21,145 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 [2018-10-03 08:43:21,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:21,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:43:21,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:21,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:21,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:21,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:43:21,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:43:21,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:43:21,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:43:21,229 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-10-03 08:43:21,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:21,514 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-03 08:43:21,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:43:21,514 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-03 08:43:21,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:21,515 INFO L225 Difference]: With dead ends: 62 [2018-10-03 08:43:21,515 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:43:21,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:43:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:43:21,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:43:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:43:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-03 08:43:21,522 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-10-03 08:43:21,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:21,522 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-03 08:43:21,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:43:21,522 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-03 08:43:21,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:43:21,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:21,523 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-10-03 08:43:21,524 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:21,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:21,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1448426227, now seen corresponding path program 16 times [2018-10-03 08:43:21,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:21,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:21,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:21,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:21,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:21,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:21,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:21,785 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:21,809 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:21,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:21,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:21,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:21,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-03 08:43:21,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:43:21,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:43:21,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:43:21,862 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-10-03 08:43:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:22,025 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-03 08:43:22,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:43:22,027 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-03 08:43:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:22,028 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:43:22,028 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:43:22,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:43:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:43:22,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-10-03 08:43:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:43:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-03 08:43:22,036 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-10-03 08:43:22,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:22,037 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-03 08:43:22,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:43:22,037 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-03 08:43:22,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:43:22,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:22,038 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-03 08:43:22,038 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:22,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:22,038 INFO L82 PathProgramCache]: Analyzing trace with hash 368133487, now seen corresponding path program 17 times [2018-10-03 08:43:22,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:22,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:22,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:22,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:22,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:22,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:22,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:22,383 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:22,410 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 08:43:22,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:22,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:22,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:22,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:43:22,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:43:22,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:43:22,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:43:22,446 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-10-03 08:43:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:23,097 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-03 08:43:23,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:43:23,098 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-03 08:43:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:23,099 INFO L225 Difference]: With dead ends: 68 [2018-10-03 08:43:23,099 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:43:23,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:43:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:43:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 08:43:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:43:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-03 08:43:23,109 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-03 08:43:23,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:23,109 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-03 08:43:23,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:43:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-03 08:43:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:43:23,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:23,110 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-10-03 08:43:23,110 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:23,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:23,111 INFO L82 PathProgramCache]: Analyzing trace with hash -788717655, now seen corresponding path program 18 times [2018-10-03 08:43:23,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:23,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:23,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:23,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:23,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:23,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:23,355 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 [2018-10-03 08:43:23,368 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:23,402 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-03 08:43:23,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:23,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:23,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:23,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-03 08:43:23,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:43:23,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:43:23,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:43:23,463 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-10-03 08:43:23,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:23,754 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-03 08:43:23,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:43:23,754 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-03 08:43:23,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:23,755 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:43:23,755 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:43:23,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:43:23,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:43:23,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-10-03 08:43:23,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:43:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-03 08:43:23,764 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-10-03 08:43:23,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:23,764 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-03 08:43:23,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:43:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-03 08:43:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:43:23,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:23,765 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-10-03 08:43:23,766 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:23,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:23,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2043489115, now seen corresponding path program 19 times [2018-10-03 08:43:23,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:23,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:23,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:23,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:23,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:24,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:24,062 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 [2018-10-03 08:43:24,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:24,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:24,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:24,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:43:24,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:43:24,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:43:24,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:43:24,131 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-10-03 08:43:24,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:24,683 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-03 08:43:24,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:43:24,684 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-03 08:43:24,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:24,684 INFO L225 Difference]: With dead ends: 74 [2018-10-03 08:43:24,684 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:43:24,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:43:24,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:43:24,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 08:43:24,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 08:43:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-03 08:43:24,691 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-10-03 08:43:24,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:24,692 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-03 08:43:24,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:43:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-03 08:43:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:43:24,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:24,693 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-10-03 08:43:24,693 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:24,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:24,693 INFO L82 PathProgramCache]: Analyzing trace with hash -957152801, now seen corresponding path program 20 times [2018-10-03 08:43:24,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:24,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:24,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:24,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:24,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:26,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:26,435 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 [2018-10-03 08:43:26,443 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:26,472 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:26,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:26,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:26,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:26,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-03 08:43:26,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:43:26,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:43:26,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:43:26,531 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-10-03 08:43:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:26,784 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-03 08:43:26,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:43:26,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-10-03 08:43:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:26,786 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:43:26,786 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:43:26,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:43:26,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:43:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-10-03 08:43:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:43:26,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-03 08:43:26,796 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-03 08:43:26,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:26,796 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-03 08:43:26,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:43:26,797 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-03 08:43:26,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:43:26,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:26,797 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-03 08:43:26,797 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:26,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:26,798 INFO L82 PathProgramCache]: Analyzing trace with hash -700907173, now seen corresponding path program 21 times [2018-10-03 08:43:26,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:26,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:26,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:26,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:26,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:27,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:27,458 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 [2018-10-03 08:43:27,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:27,497 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 08:43:27,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:27,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:27,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:27,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:43:27,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:43:27,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:43:27,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:43:27,538 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-10-03 08:43:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:27,928 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-03 08:43:27,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:43:27,928 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-03 08:43:27,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:27,929 INFO L225 Difference]: With dead ends: 80 [2018-10-03 08:43:27,929 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:43:27,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:43:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:43:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 08:43:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 08:43:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-03 08:43:27,938 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-10-03 08:43:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:27,938 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-03 08:43:27,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:43:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-03 08:43:27,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:43:27,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:27,939 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-10-03 08:43:27,939 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:27,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:27,939 INFO L82 PathProgramCache]: Analyzing trace with hash 877396373, now seen corresponding path program 22 times [2018-10-03 08:43:27,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:27,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:27,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:27,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:27,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:28,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:28,189 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 [2018-10-03 08:43:28,196 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:28,228 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:28,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:28,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:28,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:28,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-03 08:43:28,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:43:28,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:43:28,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:43:28,291 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-10-03 08:43:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:28,644 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-03 08:43:28,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:43:28,645 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-03 08:43:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:28,645 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:43:28,645 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:43:28,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:43:28,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:43:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-03 08:43:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:43:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-03 08:43:28,659 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-10-03 08:43:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:28,660 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-03 08:43:28,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:43:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-03 08:43:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:43:28,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:28,660 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-10-03 08:43:28,661 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:28,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:28,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1364257681, now seen corresponding path program 23 times [2018-10-03 08:43:28,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:28,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:28,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:28,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:28,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:29,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:29,036 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 [2018-10-03 08:43:29,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:29,083 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 08:43:29,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:29,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:29,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:29,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:43:29,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:43:29,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:43:29,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:43:29,129 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-10-03 08:43:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:29,658 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-03 08:43:29,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:43:29,658 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-03 08:43:29,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:29,659 INFO L225 Difference]: With dead ends: 86 [2018-10-03 08:43:29,659 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:43:29,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:43:29,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:43:29,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 08:43:29,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 08:43:29,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-03 08:43:29,668 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-10-03 08:43:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:29,668 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-03 08:43:29,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:43:29,668 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-03 08:43:29,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 08:43:29,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:29,669 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-10-03 08:43:29,669 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:29,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:29,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1897217739, now seen corresponding path program 24 times [2018-10-03 08:43:29,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:29,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:29,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:29,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:29,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:29,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:29,901 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 [2018-10-03 08:43:29,909 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:29,954 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-03 08:43:29,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:29,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:30,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:30,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-03 08:43:30,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:43:30,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:43:30,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:43:30,049 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-10-03 08:43:30,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:30,418 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-03 08:43:30,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:43:30,418 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-10-03 08:43:30,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:30,419 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:43:30,420 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:43:30,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:43:30,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:43:30,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-10-03 08:43:30,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:43:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-03 08:43:30,427 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-10-03 08:43:30,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:30,428 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-03 08:43:30,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:43:30,428 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-03 08:43:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:43:30,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:30,428 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-03 08:43:30,428 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:30,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:30,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2134920377, now seen corresponding path program 25 times [2018-10-03 08:43:30,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:30,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:30,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:30,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:30,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:30,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:30,789 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 [2018-10-03 08:43:30,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:30,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:30,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:30,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:43:30,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:43:30,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:43:30,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:43:30,862 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-10-03 08:43:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:31,457 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-03 08:43:31,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:43:31,458 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-03 08:43:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:31,458 INFO L225 Difference]: With dead ends: 92 [2018-10-03 08:43:31,458 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:43:31,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:43:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:43:31,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 08:43:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 08:43:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-03 08:43:31,466 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-10-03 08:43:31,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:31,466 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-03 08:43:31,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:43:31,466 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-03 08:43:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 08:43:31,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:31,466 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-10-03 08:43:31,467 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:31,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:31,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1286350463, now seen corresponding path program 26 times [2018-10-03 08:43:31,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:31,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:31,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:31,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:31,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:31,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:31,961 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 [2018-10-03 08:43:31,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:32,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:32,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:32,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:32,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:32,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-03 08:43:32,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:43:32,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:43:32,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:43:32,092 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-10-03 08:43:32,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:32,355 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-03 08:43:32,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:43:32,355 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-10-03 08:43:32,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:32,356 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:43:32,356 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 08:43:32,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:43:32,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 08:43:32,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-10-03 08:43:32,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:43:32,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-03 08:43:32,366 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-10-03 08:43:32,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:32,366 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-03 08:43:32,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:43:32,366 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-03 08:43:32,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:43:32,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:32,367 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-10-03 08:43:32,367 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:32,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:32,368 INFO L82 PathProgramCache]: Analyzing trace with hash 767719549, now seen corresponding path program 27 times [2018-10-03 08:43:32,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:32,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:32,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:32,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:32,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:33,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:33,010 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 [2018-10-03 08:43:33,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:33,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 08:43:33,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:33,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:33,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:33,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:43:33,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:43:33,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:43:33,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:43:33,091 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-10-03 08:43:33,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:33,620 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-03 08:43:33,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:43:33,620 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-03 08:43:33,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:33,621 INFO L225 Difference]: With dead ends: 98 [2018-10-03 08:43:33,621 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 08:43:33,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:43:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 08:43:33,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 08:43:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 08:43:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-03 08:43:33,632 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-10-03 08:43:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:33,632 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-03 08:43:33,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:43:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-03 08:43:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 08:43:33,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:33,633 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-10-03 08:43:33,633 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:33,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:33,633 INFO L82 PathProgramCache]: Analyzing trace with hash 285536695, now seen corresponding path program 28 times [2018-10-03 08:43:33,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:33,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:33,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:33,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:33,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:34,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:34,030 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 [2018-10-03 08:43:34,038 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:34,076 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:34,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:34,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:34,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:34,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-03 08:43:34,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:43:34,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:43:34,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:43:34,148 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-10-03 08:43:34,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:34,416 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-03 08:43:34,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:43:34,416 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-10-03 08:43:34,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:34,417 INFO L225 Difference]: With dead ends: 73 [2018-10-03 08:43:34,417 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:43:34,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:43:34,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:43:34,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-10-03 08:43:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 08:43:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-03 08:43:34,428 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-10-03 08:43:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:34,428 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-03 08:43:34,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:43:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-03 08:43:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:43:34,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:34,429 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-03 08:43:34,429 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:34,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:34,429 INFO L82 PathProgramCache]: Analyzing trace with hash -477209805, now seen corresponding path program 29 times [2018-10-03 08:43:34,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:34,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:34,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:34,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:34,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:34,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:34,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:35,007 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:35,077 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 08:43:35,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:35,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:35,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:35,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:43:35,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:43:35,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:43:35,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:43:35,117 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-10-03 08:43:36,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:36,068 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-03 08:43:36,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:43:36,069 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-03 08:43:36,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:36,069 INFO L225 Difference]: With dead ends: 104 [2018-10-03 08:43:36,070 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 08:43:36,071 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 [2018-10-03 08:43:36,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 08:43:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 08:43:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 08:43:36,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-03 08:43:36,081 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-03 08:43:36,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:36,082 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-03 08:43:36,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:43:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-03 08:43:36,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:43:36,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:36,082 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-10-03 08:43:36,083 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:36,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:36,083 INFO L82 PathProgramCache]: Analyzing trace with hash 35497837, now seen corresponding path program 30 times [2018-10-03 08:43:36,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:36,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:36,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:36,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:36,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:36,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:36,413 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 [2018-10-03 08:43:36,421 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:36,596 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-03 08:43:36,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:36,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:36,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:36,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-03 08:43:36,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:43:36,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:43:36,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:43:36,691 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-10-03 08:43:37,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:37,038 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-03 08:43:37,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:43:37,038 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-10-03 08:43:37,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:37,040 INFO L225 Difference]: With dead ends: 77 [2018-10-03 08:43:37,040 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 08:43:37,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:43:37,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 08:43:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-10-03 08:43:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:43:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-03 08:43:37,051 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-10-03 08:43:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:37,052 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-03 08:43:37,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:43:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-03 08:43:37,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:43:37,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:37,053 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-10-03 08:43:37,053 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:37,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:37,053 INFO L82 PathProgramCache]: Analyzing trace with hash -246383767, now seen corresponding path program 31 times [2018-10-03 08:43:37,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:37,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:37,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:37,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:37,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:38,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:38,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:38,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:38,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:38,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:38,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:43:38,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:43:38,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:43:38,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:43:38,511 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-10-03 08:43:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:39,303 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-03 08:43:39,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:43:39,303 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-03 08:43:39,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:39,303 INFO L225 Difference]: With dead ends: 110 [2018-10-03 08:43:39,304 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 08:43:39,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:43:39,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 08:43:39,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 08:43:39,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 08:43:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-03 08:43:39,315 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-10-03 08:43:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:39,315 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-03 08:43:39,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:43:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-03 08:43:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:43:39,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:39,315 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-10-03 08:43:39,316 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:39,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:39,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1653283491, now seen corresponding path program 32 times [2018-10-03 08:43:39,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:39,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:39,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:39,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:39,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:39,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:39,809 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 [2018-10-03 08:43:39,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:39,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:39,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:39,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:39,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:39,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-03 08:43:39,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:43:39,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:43:39,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:43:39,930 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-10-03 08:43:40,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:40,433 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-03 08:43:40,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:43:40,433 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-10-03 08:43:40,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:40,434 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:43:40,434 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:43:40,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:43:40,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:43:40,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-03 08:43:40,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:43:40,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-03 08:43:40,444 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-03 08:43:40,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:40,444 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-03 08:43:40,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:43:40,445 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-03 08:43:40,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:43:40,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:40,445 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-03 08:43:40,445 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:40,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:40,446 INFO L82 PathProgramCache]: Analyzing trace with hash -332531425, now seen corresponding path program 33 times [2018-10-03 08:43:40,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:40,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:40,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:40,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:40,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:41,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:41,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:41,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:41,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 08:43:41,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:41,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:41,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:41,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:43:41,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:43:41,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:43:41,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:43:41,359 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-10-03 08:43:42,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:42,183 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-03 08:43:42,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:43:42,183 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-03 08:43:42,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:42,183 INFO L225 Difference]: With dead ends: 116 [2018-10-03 08:43:42,183 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 08:43:42,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:43:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 08:43:42,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 08:43:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 08:43:42,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-03 08:43:42,197 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-10-03 08:43:42,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:42,197 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-03 08:43:42,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:43:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-03 08:43:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 08:43:42,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:42,198 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-10-03 08:43:42,198 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:42,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:42,199 INFO L82 PathProgramCache]: Analyzing trace with hash -198022311, now seen corresponding path program 34 times [2018-10-03 08:43:42,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:42,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:42,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:42,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:42,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:42,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:42,632 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 [2018-10-03 08:43:42,639 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:42,684 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:42,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:42,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:42,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:42,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-03 08:43:42,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:43:42,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:43:42,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:43:42,757 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-10-03 08:43:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:43,150 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-03 08:43:43,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:43:43,150 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-10-03 08:43:43,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:43,151 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:43:43,151 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:43:43,152 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 [2018-10-03 08:43:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:43:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-10-03 08:43:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:43:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-03 08:43:43,163 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-10-03 08:43:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:43,163 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-03 08:43:43,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:43:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-03 08:43:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:43:43,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:43,164 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-10-03 08:43:43,164 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:43,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:43,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1320946603, now seen corresponding path program 35 times [2018-10-03 08:43:43,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:43,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:43,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:43,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:43,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:43,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:43,883 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 [2018-10-03 08:43:43,891 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:43,957 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 08:43:43,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:43,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:43,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:43,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:43:43,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:43:43,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:43:43,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:43:43,997 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-10-03 08:43:44,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:44,803 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-03 08:43:44,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:43:44,804 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-03 08:43:44,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:44,804 INFO L225 Difference]: With dead ends: 122 [2018-10-03 08:43:44,805 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 08:43:44,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:43:44,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 08:43:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 08:43:44,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 08:43:44,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-03 08:43:44,816 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-10-03 08:43:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:44,817 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-03 08:43:44,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:43:44,817 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-03 08:43:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 08:43:44,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:44,817 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-10-03 08:43:44,818 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:44,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:44,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1626388879, now seen corresponding path program 36 times [2018-10-03 08:43:44,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:44,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:44,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:44,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:44,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:45,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:45,135 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 [2018-10-03 08:43:45,143 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:45,298 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-03 08:43:45,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:45,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:45,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:45,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-03 08:43:45,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:43:45,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:43:45,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:43:45,410 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-10-03 08:43:45,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:45,911 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-03 08:43:45,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:43:45,911 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-10-03 08:43:45,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:45,912 INFO L225 Difference]: With dead ends: 89 [2018-10-03 08:43:45,912 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 08:43:45,913 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 [2018-10-03 08:43:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 08:43:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-10-03 08:43:45,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 08:43:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-03 08:43:45,927 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-10-03 08:43:45,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:45,928 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-03 08:43:45,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:43:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-03 08:43:45,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:43:45,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:45,928 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-03 08:43:45,929 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:45,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:45,929 INFO L82 PathProgramCache]: Analyzing trace with hash -408449781, now seen corresponding path program 37 times [2018-10-03 08:43:45,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:45,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:45,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:45,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:45,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:46,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:46,642 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 [2018-10-03 08:43:46,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:46,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:46,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:46,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:43:46,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:43:46,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:43:46,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:43:46,764 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-10-03 08:43:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:48,326 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-03 08:43:48,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:43:48,326 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-03 08:43:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:48,327 INFO L225 Difference]: With dead ends: 128 [2018-10-03 08:43:48,327 INFO L226 Difference]: Without dead ends: 85 [2018-10-03 08:43:48,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=921, Invalid=2861, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:43:48,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-03 08:43:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-03 08:43:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-03 08:43:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-03 08:43:48,341 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-10-03 08:43:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:48,341 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-03 08:43:48,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:43:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-03 08:43:48,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-03 08:43:48,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:48,341 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-10-03 08:43:48,342 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:48,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:48,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1130683067, now seen corresponding path program 38 times [2018-10-03 08:43:48,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:48,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:48,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:48,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:48,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:48,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:48,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:48,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:48,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:48,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:48,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:48,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:48,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-03 08:43:48,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:43:48,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:43:48,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:43:48,752 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-10-03 08:43:49,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:49,271 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-03 08:43:49,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:43:49,271 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-10-03 08:43:49,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:49,272 INFO L225 Difference]: With dead ends: 93 [2018-10-03 08:43:49,272 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 08:43:49,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:43:49,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 08:43:49,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-10-03 08:43:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 08:43:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-03 08:43:49,287 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-10-03 08:43:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:49,287 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-03 08:43:49,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:43:49,287 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-03 08:43:49,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:43:49,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:49,288 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-10-03 08:43:49,288 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:49,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:49,288 INFO L82 PathProgramCache]: Analyzing trace with hash 40231745, now seen corresponding path program 39 times [2018-10-03 08:43:49,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:49,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:49,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:49,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:49,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:50,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:50,011 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 [2018-10-03 08:43:50,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:50,080 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-03 08:43:50,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:50,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:50,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:50,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:43:50,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:43:50,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:43:50,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:43:50,121 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-10-03 08:43:51,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:51,350 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-03 08:43:51,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:43:51,350 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-03 08:43:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:51,351 INFO L225 Difference]: With dead ends: 134 [2018-10-03 08:43:51,351 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 08:43:51,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:43:51,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 08:43:51,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-03 08:43:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-03 08:43:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-03 08:43:51,364 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-10-03 08:43:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:51,364 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-03 08:43:51,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:43:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-03 08:43:51,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 08:43:51,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:51,365 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-10-03 08:43:51,365 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:51,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:51,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2030121349, now seen corresponding path program 40 times [2018-10-03 08:43:51,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:51,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:51,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:51,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:51,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:51,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:51,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:51,774 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:51,824 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:51,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:51,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:51,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:51,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-03 08:43:51,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:43:51,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:43:51,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:43:51,897 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-10-03 08:43:52,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:52,312 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-03 08:43:52,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:43:52,313 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-10-03 08:43:52,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:52,313 INFO L225 Difference]: With dead ends: 97 [2018-10-03 08:43:52,313 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 08:43:52,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:43:52,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 08:43:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-10-03 08:43:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:43:52,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-03 08:43:52,329 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-10-03 08:43:52,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:52,330 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-03 08:43:52,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:43:52,330 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-03 08:43:52,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:43:52,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:52,330 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-03 08:43:52,331 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:52,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:52,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1031530761, now seen corresponding path program 41 times [2018-10-03 08:43:52,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:52,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:52,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:52,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:52,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:53,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:53,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:53,055 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:53,118 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-03 08:43:53,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:53,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:53,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:53,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:43:53,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:43:53,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:43:53,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:43:53,163 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-10-03 08:43:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:53,790 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-03 08:43:53,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:43:53,790 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-03 08:43:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:53,791 INFO L225 Difference]: With dead ends: 140 [2018-10-03 08:43:53,791 INFO L226 Difference]: Without dead ends: 93 [2018-10-03 08:43:53,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1101, Invalid=3455, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:43:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-03 08:43:53,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-03 08:43:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-03 08:43:53,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-03 08:43:53,805 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-03 08:43:53,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:53,806 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-03 08:43:53,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:43:53,806 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-03 08:43:53,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 08:43:53,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:53,807 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-10-03 08:43:53,807 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:53,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:53,807 INFO L82 PathProgramCache]: Analyzing trace with hash 769709361, now seen corresponding path program 42 times [2018-10-03 08:43:53,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:53,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:53,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:53,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:53,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:54,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:54,277 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 [2018-10-03 08:43:54,285 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:54,352 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-03 08:43:54,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:54,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:54,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:54,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-03 08:43:54,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:43:54,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:43:54,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:43:54,442 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-10-03 08:43:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:54,861 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-03 08:43:54,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:43:54,862 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-10-03 08:43:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:54,862 INFO L225 Difference]: With dead ends: 101 [2018-10-03 08:43:54,862 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 08:43:54,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:43:54,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 08:43:54,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-03 08:43:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 08:43:54,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-03 08:43:54,877 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-10-03 08:43:54,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:54,877 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-03 08:43:54,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:43:54,877 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-03 08:43:54,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 08:43:54,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:54,878 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-10-03 08:43:54,878 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:54,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:54,878 INFO L82 PathProgramCache]: Analyzing trace with hash 956254253, now seen corresponding path program 43 times [2018-10-03 08:43:54,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:54,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:54,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:54,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:54,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:55,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:55,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:55,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:55,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:56,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:56,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:43:56,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:43:56,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:43:56,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:43:56,031 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-10-03 08:43:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:58,441 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-03 08:43:58,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:43:58,441 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-03 08:43:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:58,441 INFO L225 Difference]: With dead ends: 146 [2018-10-03 08:43:58,442 INFO L226 Difference]: Without dead ends: 97 [2018-10-03 08:43:58,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1197, Invalid=3773, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:43:58,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-03 08:43:58,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-03 08:43:58,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-03 08:43:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-03 08:43:58,456 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-10-03 08:43:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:58,456 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-03 08:43:58,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:43:58,456 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-03 08:43:58,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-03 08:43:58,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:58,457 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-10-03 08:43:58,457 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:58,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:58,457 INFO L82 PathProgramCache]: Analyzing trace with hash 251550055, now seen corresponding path program 44 times [2018-10-03 08:43:58,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:58,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:58,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:58,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:58,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:58,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:58,903 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 [2018-10-03 08:43:58,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:58,989 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:58,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:58,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:59,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:59,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-03 08:43:59,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:43:59,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:43:59,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:43:59,050 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-10-03 08:43:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:59,505 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-03 08:43:59,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:43:59,506 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-10-03 08:43:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:59,506 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:43:59,507 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 08:43:59,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:43:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 08:43:59,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-10-03 08:43:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 08:43:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-03 08:43:59,521 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-03 08:43:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:59,521 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-03 08:43:59,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:43:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-03 08:43:59,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:43:59,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:59,522 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-03 08:43:59,522 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:59,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:59,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1221367523, now seen corresponding path program 45 times [2018-10-03 08:43:59,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:59,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:59,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:59,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:59,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:00,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:00,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:44:00,431 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:44:00,500 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-03 08:44:00,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:00,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:00,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:00,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:44:00,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:44:00,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:44:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:44:00,541 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-10-03 08:44:02,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:02,716 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-03 08:44:02,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:44:02,717 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-03 08:44:02,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:02,717 INFO L225 Difference]: With dead ends: 152 [2018-10-03 08:44:02,717 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 08:44:02,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1297, Invalid=4105, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:44:02,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 08:44:02,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-03 08:44:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 08:44:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-03 08:44:02,736 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-10-03 08:44:02,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:02,736 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-03 08:44:02,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:44:02,736 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-03 08:44:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 08:44:02,737 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:02,737 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-10-03 08:44:02,737 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:02,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash -99845347, now seen corresponding path program 46 times [2018-10-03 08:44:02,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:02,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:02,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:02,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:02,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:03,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:03,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:44:03,603 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:44:03,665 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:44:03,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:03,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:03,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:03,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-03 08:44:03,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:44:03,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:44:03,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:44:03,739 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-10-03 08:44:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:04,243 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-03 08:44:04,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:44:04,243 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-10-03 08:44:04,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:04,244 INFO L225 Difference]: With dead ends: 109 [2018-10-03 08:44:04,245 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 08:44:04,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:44:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 08:44:04,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-10-03 08:44:04,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 08:44:04,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-03 08:44:04,265 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-10-03 08:44:04,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:04,265 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-03 08:44:04,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:44:04,266 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-03 08:44:04,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:44:04,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:04,266 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-10-03 08:44:04,267 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:04,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:04,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1462164711, now seen corresponding path program 47 times [2018-10-03 08:44:04,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:04,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:04,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:04,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:04,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:05,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:05,076 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 [2018-10-03 08:44:05,098 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:44:05,174 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 08:44:05,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:05,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:05,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:05,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:44:05,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:44:05,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:44:05,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:44:05,218 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-10-03 08:44:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:06,689 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-03 08:44:06,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:44:06,689 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-03 08:44:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:06,689 INFO L225 Difference]: With dead ends: 158 [2018-10-03 08:44:06,690 INFO L226 Difference]: Without dead ends: 105 [2018-10-03 08:44:06,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1401, Invalid=4451, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:44:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-03 08:44:06,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-03 08:44:06,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 08:44:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-03 08:44:06,712 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-10-03 08:44:06,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:06,712 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-03 08:44:06,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:44:06,712 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-03 08:44:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 08:44:06,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:06,713 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-10-03 08:44:06,713 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:06,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:06,714 INFO L82 PathProgramCache]: Analyzing trace with hash 850942547, now seen corresponding path program 48 times [2018-10-03 08:44:06,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:06,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:06,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:06,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:06,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:07,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:07,195 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 [2018-10-03 08:44:07,203 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:44:07,282 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-03 08:44:07,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:07,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:07,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:07,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-03 08:44:07,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:44:07,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:44:07,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:44:07,525 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-10-03 08:44:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:08,113 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-03 08:44:08,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:44:08,114 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-10-03 08:44:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:08,115 INFO L225 Difference]: With dead ends: 113 [2018-10-03 08:44:08,115 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 08:44:08,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:44:08,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 08:44:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-10-03 08:44:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-03 08:44:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-03 08:44:08,140 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-10-03 08:44:08,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:08,140 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-03 08:44:08,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:44:08,140 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-03 08:44:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 08:44:08,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:08,141 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-03 08:44:08,141 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:08,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:08,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1711934671, now seen corresponding path program 49 times [2018-10-03 08:44:08,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:08,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:08,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:08,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:08,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:09,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:09,378 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 [2018-10-03 08:44:09,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:09,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:09,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:09,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 08:44:09,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:44:09,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:44:09,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:44:09,495 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-10-03 08:44:10,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:10,865 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-03 08:44:10,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:44:10,865 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-03 08:44:10,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:10,866 INFO L225 Difference]: With dead ends: 164 [2018-10-03 08:44:10,867 INFO L226 Difference]: Without dead ends: 109 [2018-10-03 08:44:10,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1509, Invalid=4811, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:44:10,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-03 08:44:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-03 08:44:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-03 08:44:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-03 08:44:10,889 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-10-03 08:44:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:10,889 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-03 08:44:10,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:44:10,889 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-03 08:44:10,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 08:44:10,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:10,890 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-10-03 08:44:10,890 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:10,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:10,891 INFO L82 PathProgramCache]: Analyzing trace with hash -223930615, now seen corresponding path program 50 times [2018-10-03 08:44:10,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:10,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:10,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:10,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:10,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:11,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:11,686 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 [2018-10-03 08:44:11,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:44:11,757 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:44:11,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:11,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:11,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:11,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-03 08:44:11,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:44:11,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:44:11,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:44:11,852 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-10-03 08:44:12,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:12,388 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-03 08:44:12,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 08:44:12,389 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-10-03 08:44:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:12,390 INFO L225 Difference]: With dead ends: 117 [2018-10-03 08:44:12,390 INFO L226 Difference]: Without dead ends: 115 [2018-10-03 08:44:12,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:44:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-03 08:44:12,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-10-03 08:44:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 08:44:12,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-03 08:44:12,410 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-10-03 08:44:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:12,410 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-03 08:44:12,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:44:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-03 08:44:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 08:44:12,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:12,411 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-10-03 08:44:12,411 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:12,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:12,412 INFO L82 PathProgramCache]: Analyzing trace with hash -449022971, now seen corresponding path program 51 times [2018-10-03 08:44:12,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:12,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:12,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:12,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:12,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:13,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:13,303 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 [2018-10-03 08:44:13,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:44:13,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-03 08:44:13,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:13,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:13,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:13,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 08:44:13,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:44:13,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:44:13,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:44:13,439 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-10-03 08:44:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:14,960 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-03 08:44:14,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:44:14,960 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-03 08:44:14,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:14,961 INFO L225 Difference]: With dead ends: 170 [2018-10-03 08:44:14,961 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 08:44:14,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:44:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 08:44:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-03 08:44:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-03 08:44:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-03 08:44:14,979 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-10-03 08:44:14,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:14,979 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-03 08:44:14,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:44:14,979 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-03 08:44:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-03 08:44:14,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:14,980 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-10-03 08:44:14,980 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:14,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:14,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1802883391, now seen corresponding path program 52 times [2018-10-03 08:44:14,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:14,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:14,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:14,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:14,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:15,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:15,712 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 [2018-10-03 08:44:15,718 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:44:15,783 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:44:15,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:15,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:15,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:15,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-03 08:44:15,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:44:15,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:44:15,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:44:15,956 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-10-03 08:44:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:16,698 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-03 08:44:16,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:44:16,699 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-10-03 08:44:16,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:16,699 INFO L225 Difference]: With dead ends: 121 [2018-10-03 08:44:16,700 INFO L226 Difference]: Without dead ends: 119 [2018-10-03 08:44:16,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:44:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-03 08:44:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-03 08:44:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 08:44:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-03 08:44:16,726 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-10-03 08:44:16,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:16,726 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-03 08:44:16,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:44:16,727 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-03 08:44:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 08:44:16,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:16,727 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-03 08:44:16,728 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:16,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:16,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1699051707, now seen corresponding path program 53 times [2018-10-03 08:44:16,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:16,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:16,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:16,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:16,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:18,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:18,022 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 [2018-10-03 08:44:18,030 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:44:18,114 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-03 08:44:18,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:18,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:18,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:18,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 08:44:18,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:44:18,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:44:18,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:44:18,173 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-10-03 08:44:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:19,735 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-03 08:44:19,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:44:19,735 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-03 08:44:19,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:19,736 INFO L225 Difference]: With dead ends: 176 [2018-10-03 08:44:19,736 INFO L226 Difference]: Without dead ends: 117 [2018-10-03 08:44:19,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1737, Invalid=5573, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:44:19,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-03 08:44:19,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-03 08:44:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-03 08:44:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-03 08:44:19,756 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-03 08:44:19,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:19,756 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-03 08:44:19,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:44:19,756 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-03 08:44:19,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-03 08:44:19,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:19,757 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-10-03 08:44:19,757 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:19,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:19,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1220126965, now seen corresponding path program 54 times [2018-10-03 08:44:19,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:19,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:19,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:19,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:19,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:20,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:20,407 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 [2018-10-03 08:44:20,414 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:44:20,504 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-03 08:44:20,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:20,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:20,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:20,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-03 08:44:20,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:44:20,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:44:20,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:44:20,673 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-10-03 08:44:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:21,393 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-03 08:44:21,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 08:44:21,393 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-10-03 08:44:21,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:21,394 INFO L225 Difference]: With dead ends: 125 [2018-10-03 08:44:21,394 INFO L226 Difference]: Without dead ends: 123 [2018-10-03 08:44:21,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:44:21,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-03 08:44:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-03 08:44:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-03 08:44:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-03 08:44:21,421 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-10-03 08:44:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:21,421 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-03 08:44:21,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:44:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-03 08:44:21,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-03 08:44:21,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:21,422 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-10-03 08:44:21,422 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:21,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:21,423 INFO L82 PathProgramCache]: Analyzing trace with hash 15874801, now seen corresponding path program 55 times [2018-10-03 08:44:21,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:21,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:21,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:21,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:21,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:22,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:22,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:44:22,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:22,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:22,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:22,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-03 08:44:22,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 08:44:22,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 08:44:22,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:44:22,644 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-10-03 08:44:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:24,434 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-10-03 08:44:24,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:44:24,434 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-03 08:44:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:24,435 INFO L225 Difference]: With dead ends: 182 [2018-10-03 08:44:24,435 INFO L226 Difference]: Without dead ends: 121 [2018-10-03 08:44:24,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1857, Invalid=5975, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:44:24,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-03 08:44:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-03 08:44:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-03 08:44:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-03 08:44:24,456 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-10-03 08:44:24,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:24,456 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-03 08:44:24,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 08:44:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-03 08:44:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-03 08:44:24,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:24,457 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-10-03 08:44:24,457 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:24,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:24,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1308639701, now seen corresponding path program 56 times [2018-10-03 08:44:24,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:24,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:24,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:24,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:24,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:25,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:25,033 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 [2018-10-03 08:44:25,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:44:25,112 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:44:25,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:25,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:25,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:25,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-03 08:44:25,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:44:25,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:44:25,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:44:25,377 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-10-03 08:44:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:26,004 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-10-03 08:44:26,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:44:26,005 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-10-03 08:44:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:26,006 INFO L225 Difference]: With dead ends: 129 [2018-10-03 08:44:26,006 INFO L226 Difference]: Without dead ends: 127 [2018-10-03 08:44:26,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:44:26,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-03 08:44:26,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-10-03 08:44:26,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-03 08:44:26,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-03 08:44:26,035 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-03 08:44:26,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:26,036 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-03 08:44:26,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:44:26,036 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-03 08:44:26,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-03 08:44:26,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:26,036 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-03 08:44:26,036 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:26,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:26,037 INFO L82 PathProgramCache]: Analyzing trace with hash 822598311, now seen corresponding path program 57 times [2018-10-03 08:44:26,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:26,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:26,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:26,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:26,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:27,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:27,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:44:27,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:44:27,626 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-03 08:44:27,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:27,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:27,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:27,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 08:44:27,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:44:27,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:44:27,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:44:27,686 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 62 states. [2018-10-03 08:44:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:30,193 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-03 08:44:30,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:44:30,194 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-03 08:44:30,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:30,194 INFO L225 Difference]: With dead ends: 188 [2018-10-03 08:44:30,194 INFO L226 Difference]: Without dead ends: 125 [2018-10-03 08:44:30,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1981, Invalid=6391, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:44:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-03 08:44:30,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-03 08:44:30,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-03 08:44:30,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-03 08:44:30,214 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-10-03 08:44:30,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:30,214 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-03 08:44:30,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:44:30,214 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-03 08:44:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-03 08:44:30,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:30,215 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-10-03 08:44:30,215 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:30,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:30,215 INFO L82 PathProgramCache]: Analyzing trace with hash -858967839, now seen corresponding path program 58 times [2018-10-03 08:44:30,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:30,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:30,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:30,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:30,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:30,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:30,720 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 [2018-10-03 08:44:30,730 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:44:30,809 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:44:30,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:30,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:30,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:30,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-03 08:44:30,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:44:30,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:44:30,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:44:30,987 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-10-03 08:44:31,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:31,854 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-03 08:44:31,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:44:31,854 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-10-03 08:44:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:31,855 INFO L225 Difference]: With dead ends: 133 [2018-10-03 08:44:31,855 INFO L226 Difference]: Without dead ends: 131 [2018-10-03 08:44:31,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:44:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-03 08:44:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-10-03 08:44:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-03 08:44:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-03 08:44:31,880 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-10-03 08:44:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:31,880 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-03 08:44:31,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:44:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-03 08:44:31,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-03 08:44:31,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:31,881 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-10-03 08:44:31,881 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:31,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:31,882 INFO L82 PathProgramCache]: Analyzing trace with hash -834439203, now seen corresponding path program 59 times [2018-10-03 08:44:31,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:31,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:31,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:31,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:31,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:33,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:33,184 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 [2018-10-03 08:44:33,191 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:44:33,289 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-03 08:44:33,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:33,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:33,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:33,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 08:44:33,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 08:44:33,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 08:44:33,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:44:33,335 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 64 states. [2018-10-03 08:44:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:35,372 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-10-03 08:44:35,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:44:35,372 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-03 08:44:35,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:35,373 INFO L225 Difference]: With dead ends: 194 [2018-10-03 08:44:35,373 INFO L226 Difference]: Without dead ends: 129 [2018-10-03 08:44:35,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2109, Invalid=6821, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:44:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-03 08:44:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-03 08:44:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-03 08:44:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-03 08:44:35,397 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-10-03 08:44:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:35,397 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-03 08:44:35,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 08:44:35,397 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-03 08:44:35,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-03 08:44:35,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:35,398 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-10-03 08:44:35,398 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:35,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:35,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1096867561, now seen corresponding path program 60 times [2018-10-03 08:44:35,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:35,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:35,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:35,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:35,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:35,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:35,981 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 [2018-10-03 08:44:35,989 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:44:36,092 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-03 08:44:36,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:36,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:36,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:36,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-03 08:44:36,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:44:36,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:44:36,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:44:36,174 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-10-03 08:44:37,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:37,105 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-10-03 08:44:37,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:44:37,105 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-10-03 08:44:37,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:37,106 INFO L225 Difference]: With dead ends: 137 [2018-10-03 08:44:37,106 INFO L226 Difference]: Without dead ends: 135 [2018-10-03 08:44:37,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:44:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-03 08:44:37,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-10-03 08:44:37,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-03 08:44:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-03 08:44:37,131 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-10-03 08:44:37,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:37,131 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-03 08:44:37,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:44:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-03 08:44:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-03 08:44:37,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:37,131 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-03 08:44:37,132 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:37,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1822805357, now seen corresponding path program 61 times [2018-10-03 08:44:37,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:37,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:37,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:37,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:37,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:38,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:38,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:44:38,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:38,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:38,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:38,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-03 08:44:38,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:44:38,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:44:38,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:44:38,498 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 66 states. [2018-10-03 08:44:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:40,643 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-10-03 08:44:40,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:44:40,644 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-03 08:44:40,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:40,644 INFO L225 Difference]: With dead ends: 200 [2018-10-03 08:44:40,644 INFO L226 Difference]: Without dead ends: 133 [2018-10-03 08:44:40,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2241, Invalid=7265, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:44:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-03 08:44:40,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-03 08:44:40,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-03 08:44:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-03 08:44:40,668 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-10-03 08:44:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:40,668 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-03 08:44:40,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:44:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-03 08:44:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-03 08:44:40,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:40,669 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-10-03 08:44:40,669 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:40,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:40,669 INFO L82 PathProgramCache]: Analyzing trace with hash 787132109, now seen corresponding path program 62 times [2018-10-03 08:44:40,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:40,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:40,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:40,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:40,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:41,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:41,392 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 [2018-10-03 08:44:41,400 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:44:41,479 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:44:41,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:41,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:41,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:41,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-03 08:44:41,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:44:41,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:44:41,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:44:41,672 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-10-03 08:44:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:42,537 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-10-03 08:44:42,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 08:44:42,537 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-10-03 08:44:42,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:42,538 INFO L225 Difference]: With dead ends: 141 [2018-10-03 08:44:42,538 INFO L226 Difference]: Without dead ends: 139 [2018-10-03 08:44:42,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:44:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-03 08:44:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-03 08:44:42,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-03 08:44:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-03 08:44:42,565 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-10-03 08:44:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:42,565 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-03 08:44:42,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:44:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-03 08:44:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-03 08:44:42,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:42,566 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-10-03 08:44:42,567 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:42,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash 519645897, now seen corresponding path program 63 times [2018-10-03 08:44:42,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:42,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:42,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:42,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:42,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:43,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:43,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:44:43,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:44:44,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-03 08:44:44,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:44,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:44,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:44,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 08:44:44,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 08:44:44,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 08:44:44,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:44:44,075 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 68 states. [2018-10-03 08:44:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:46,313 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-10-03 08:44:46,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:44:46,313 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-03 08:44:46,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:46,314 INFO L225 Difference]: With dead ends: 206 [2018-10-03 08:44:46,314 INFO L226 Difference]: Without dead ends: 137 [2018-10-03 08:44:46,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2377, Invalid=7723, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:44:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-03 08:44:46,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-03 08:44:46,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-03 08:44:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-10-03 08:44:46,340 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-10-03 08:44:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:46,340 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-10-03 08:44:46,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 08:44:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-10-03 08:44:46,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-03 08:44:46,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:46,341 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-10-03 08:44:46,341 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:46,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635779, now seen corresponding path program 64 times [2018-10-03 08:44:46,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:46,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:46,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:46,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:46,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:47,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:47,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:44:47,230 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:44:47,312 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:44:47,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:47,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:47,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:47,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-03 08:44:47,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:44:47,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:44:47,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:44:47,429 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-10-03 08:44:48,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:48,143 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-03 08:44:48,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 08:44:48,143 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-10-03 08:44:48,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:48,144 INFO L225 Difference]: With dead ends: 145 [2018-10-03 08:44:48,144 INFO L226 Difference]: Without dead ends: 143 [2018-10-03 08:44:48,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:44:48,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-03 08:44:48,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-10-03 08:44:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-03 08:44:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-03 08:44:48,171 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-10-03 08:44:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:48,171 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-03 08:44:48,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:44:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-03 08:44:48,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-03 08:44:48,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:48,172 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-03 08:44:48,172 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:48,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:48,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1975877759, now seen corresponding path program 65 times [2018-10-03 08:44:48,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:48,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:48,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:48,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:48,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:49,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:49,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:44:49,611 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:44:49,723 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-03 08:44:49,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:49,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:49,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:49,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 08:44:49,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:44:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:44:49,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:44:49,784 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 70 states. [2018-10-03 08:44:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:52,337 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-03 08:44:52,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:44:52,337 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-03 08:44:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:52,338 INFO L225 Difference]: With dead ends: 212 [2018-10-03 08:44:52,338 INFO L226 Difference]: Without dead ends: 141 [2018-10-03 08:44:52,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2517, Invalid=8195, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:44:52,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-03 08:44:52,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-03 08:44:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-03 08:44:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-03 08:44:52,365 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-03 08:44:52,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:52,365 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-03 08:44:52,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:44:52,365 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-03 08:44:52,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-03 08:44:52,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:52,366 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-10-03 08:44:52,366 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:52,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:52,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1050354361, now seen corresponding path program 66 times [2018-10-03 08:44:52,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:52,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:52,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:52,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:52,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:52,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:52,944 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 [2018-10-03 08:44:52,952 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:44:53,065 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-03 08:44:53,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:53,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:53,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:53,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-03 08:44:53,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:44:53,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:44:53,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:44:53,357 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-10-03 08:44:54,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:54,108 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-10-03 08:44:54,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 08:44:54,108 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-10-03 08:44:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:54,110 INFO L225 Difference]: With dead ends: 149 [2018-10-03 08:44:54,110 INFO L226 Difference]: Without dead ends: 147 [2018-10-03 08:44:54,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:44:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-03 08:44:54,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-10-03 08:44:54,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-03 08:44:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-03 08:44:54,141 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-10-03 08:44:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:54,141 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-03 08:44:54,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:44:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-03 08:44:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-03 08:44:54,142 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:54,142 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-10-03 08:44:54,142 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:54,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:54,142 INFO L82 PathProgramCache]: Analyzing trace with hash 73159605, now seen corresponding path program 67 times [2018-10-03 08:44:54,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:54,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:54,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:54,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:54,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:55,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:55,676 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 [2018-10-03 08:44:55,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:55,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:55,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:55,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-03 08:44:55,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 08:44:55,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 08:44:55,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:44:55,813 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 72 states. [2018-10-03 08:44:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:58,455 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-10-03 08:44:58,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:44:58,455 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-03 08:44:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:58,456 INFO L225 Difference]: With dead ends: 218 [2018-10-03 08:44:58,456 INFO L226 Difference]: Without dead ends: 145 [2018-10-03 08:44:58,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2661, Invalid=8681, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:44:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-03 08:44:58,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-03 08:44:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-03 08:44:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-03 08:44:58,487 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-10-03 08:44:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:58,487 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-03 08:44:58,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 08:44:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-03 08:44:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-03 08:44:58,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:58,488 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-10-03 08:44:58,489 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:58,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:58,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1220692207, now seen corresponding path program 68 times [2018-10-03 08:44:58,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:58,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:58,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:58,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:58,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:59,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:59,117 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 [2018-10-03 08:44:59,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:44:59,207 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:44:59,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:59,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:59,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:59,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-03 08:44:59,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:44:59,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:44:59,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:44:59,293 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-10-03 08:45:00,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:00,096 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-10-03 08:45:00,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 08:45:00,096 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-10-03 08:45:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:00,097 INFO L225 Difference]: With dead ends: 153 [2018-10-03 08:45:00,098 INFO L226 Difference]: Without dead ends: 151 [2018-10-03 08:45:00,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:45:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-03 08:45:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-10-03 08:45:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-03 08:45:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-03 08:45:00,137 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-03 08:45:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:00,137 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-03 08:45:00,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:45:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-03 08:45:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-03 08:45:00,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:00,138 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-03 08:45:00,138 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:00,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:00,139 INFO L82 PathProgramCache]: Analyzing trace with hash 559072363, now seen corresponding path program 69 times [2018-10-03 08:45:00,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:00,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:00,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:00,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:00,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:01,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:01,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:45:01,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:45:01,821 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-03 08:45:01,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:01,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:01,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:01,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 08:45:01,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:45:01,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:45:01,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:45:01,872 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 74 states. [2018-10-03 08:45:04,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:04,682 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-10-03 08:45:04,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 08:45:04,682 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-03 08:45:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:04,683 INFO L225 Difference]: With dead ends: 224 [2018-10-03 08:45:04,683 INFO L226 Difference]: Without dead ends: 149 [2018-10-03 08:45:04,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2809, Invalid=9181, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:45:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-03 08:45:04,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-03 08:45:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-03 08:45:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-10-03 08:45:04,720 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-10-03 08:45:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:04,720 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-10-03 08:45:04,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:45:04,720 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-10-03 08:45:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-03 08:45:04,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:04,721 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-10-03 08:45:04,722 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:04,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:04,722 INFO L82 PathProgramCache]: Analyzing trace with hash 719817893, now seen corresponding path program 70 times [2018-10-03 08:45:04,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:04,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:04,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:04,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:04,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:05,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:05,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:45:05,432 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:45:05,520 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:45:05,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:05,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:05,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:05,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-03 08:45:05,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:45:05,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:45:05,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:45:05,629 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-10-03 08:45:06,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:06,469 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-03 08:45:06,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 08:45:06,470 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-10-03 08:45:06,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:06,470 INFO L225 Difference]: With dead ends: 157 [2018-10-03 08:45:06,470 INFO L226 Difference]: Without dead ends: 155 [2018-10-03 08:45:06,471 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 [2018-10-03 08:45:06,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-03 08:45:06,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-10-03 08:45:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-03 08:45:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-03 08:45:06,506 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-10-03 08:45:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:06,506 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-03 08:45:06,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:45:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-03 08:45:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-03 08:45:06,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:06,507 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-10-03 08:45:06,508 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:06,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:06,508 INFO L82 PathProgramCache]: Analyzing trace with hash 255193761, now seen corresponding path program 71 times [2018-10-03 08:45:06,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:06,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:06,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:06,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:06,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:08,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:08,312 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 [2018-10-03 08:45:08,319 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:45:08,444 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-03 08:45:08,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:08,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:08,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:08,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 08:45:08,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 08:45:08,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 08:45:08,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:45:08,497 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 76 states. [2018-10-03 08:45:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:11,259 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-10-03 08:45:11,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 08:45:11,259 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-03 08:45:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:11,260 INFO L225 Difference]: With dead ends: 230 [2018-10-03 08:45:11,260 INFO L226 Difference]: Without dead ends: 153 [2018-10-03 08:45:11,261 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 [2018-10-03 08:45:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-03 08:45:11,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-03 08:45:11,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-03 08:45:11,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-03 08:45:11,298 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-10-03 08:45:11,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:11,299 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-03 08:45:11,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 08:45:11,299 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-03 08:45:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-03 08:45:11,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:11,299 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-10-03 08:45:11,300 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:11,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:11,300 INFO L82 PathProgramCache]: Analyzing trace with hash 878185947, now seen corresponding path program 72 times [2018-10-03 08:45:11,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:11,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:11,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:11,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:11,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:12,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:12,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:45:12,033 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:45:12,160 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-03 08:45:12,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:12,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:12,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:12,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-10-03 08:45:12,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:45:12,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:45:12,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:45:12,299 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-10-03 08:45:13,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:13,306 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-10-03 08:45:13,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 08:45:13,306 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-10-03 08:45:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:13,307 INFO L225 Difference]: With dead ends: 161 [2018-10-03 08:45:13,308 INFO L226 Difference]: Without dead ends: 159 [2018-10-03 08:45:13,308 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 [2018-10-03 08:45:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-03 08:45:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-03 08:45:13,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-03 08:45:13,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-03 08:45:13,341 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-10-03 08:45:13,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:13,341 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-03 08:45:13,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:45:13,341 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-03 08:45:13,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-03 08:45:13,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:13,342 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-03 08:45:13,342 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:13,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:13,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2123038295, now seen corresponding path program 73 times [2018-10-03 08:45:13,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:13,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:13,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:13,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:13,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:15,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:15,002 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 [2018-10-03 08:45:15,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:45:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:15,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:15,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:15,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-03 08:45:15,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:45:15,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:45:15,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:45:15,154 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 78 states. [2018-10-03 08:45:18,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:18,299 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-10-03 08:45:18,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 08:45:18,299 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-03 08:45:18,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:18,300 INFO L225 Difference]: With dead ends: 236 [2018-10-03 08:45:18,300 INFO L226 Difference]: Without dead ends: 157 [2018-10-03 08:45:18,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3117, Invalid=10223, Unknown=0, NotChecked=0, Total=13340 [2018-10-03 08:45:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-03 08:45:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-03 08:45:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-03 08:45:18,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-03 08:45:18,333 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-10-03 08:45:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:18,334 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-03 08:45:18,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:45:18,334 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-03 08:45:18,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-03 08:45:18,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:18,334 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-10-03 08:45:18,335 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:18,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:18,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1034359663, now seen corresponding path program 74 times [2018-10-03 08:45:18,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:18,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:18,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:18,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:45:18,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:19,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:19,066 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 [2018-10-03 08:45:19,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:45:19,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:45:19,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:19,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:19,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:19,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-03 08:45:19,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:45:19,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:45:19,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:45:19,260 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-10-03 08:45:20,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:20,168 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-10-03 08:45:20,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 08:45:20,168 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-10-03 08:45:20,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:20,170 INFO L225 Difference]: With dead ends: 165 [2018-10-03 08:45:20,170 INFO L226 Difference]: Without dead ends: 163 [2018-10-03 08:45:20,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:45:20,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-03 08:45:20,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-10-03 08:45:20,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-03 08:45:20,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-03 08:45:20,206 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-10-03 08:45:20,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:20,206 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-03 08:45:20,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:45:20,206 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-03 08:45:20,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-03 08:45:20,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:20,207 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-10-03 08:45:20,207 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:20,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:20,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1882257523, now seen corresponding path program 75 times [2018-10-03 08:45:20,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:20,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:20,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:20,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:20,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:21,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:21,921 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 [2018-10-03 08:45:21,928 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:45:22,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-03 08:45:22,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:22,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:22,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:22,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-03 08:45:22,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:45:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:45:22,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4681, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:45:22,131 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 80 states. [2018-10-03 08:45:25,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:25,462 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-10-03 08:45:25,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 08:45:25,462 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-03 08:45:25,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:25,463 INFO L225 Difference]: With dead ends: 242 [2018-10-03 08:45:25,463 INFO L226 Difference]: Without dead ends: 161 [2018-10-03 08:45:25,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3277, Invalid=10765, Unknown=0, NotChecked=0, Total=14042 [2018-10-03 08:45:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-03 08:45:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-03 08:45:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-03 08:45:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-03 08:45:25,503 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-10-03 08:45:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:25,503 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-03 08:45:25,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:45:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-03 08:45:25,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-03 08:45:25,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:25,504 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-10-03 08:45:25,505 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:25,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:25,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1109870791, now seen corresponding path program 76 times [2018-10-03 08:45:25,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:25,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:25,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:25,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:25,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:26,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:26,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:45:26,278 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:45:26,374 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:45:26,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:26,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:26,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:26,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-03 08:45:26,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:45:26,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:45:26,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:45:26,465 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-10-03 08:45:27,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:27,423 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-03 08:45:27,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 08:45:27,424 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-10-03 08:45:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:27,424 INFO L225 Difference]: With dead ends: 169 [2018-10-03 08:45:27,424 INFO L226 Difference]: Without dead ends: 167 [2018-10-03 08:45:27,425 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 [2018-10-03 08:45:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-03 08:45:27,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-10-03 08:45:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-03 08:45:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-03 08:45:27,461 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-10-03 08:45:27,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:27,462 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-03 08:45:27,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:45:27,462 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-03 08:45:27,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-03 08:45:27,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:27,462 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-03 08:45:27,463 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:27,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:27,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1433873987, now seen corresponding path program 77 times [2018-10-03 08:45:27,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:27,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:27,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:27,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:27,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:29,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:29,631 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 [2018-10-03 08:45:29,637 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:45:29,776 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-03 08:45:29,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:29,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:29,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:29,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-03 08:45:29,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:45:29,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:45:29,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:45:29,839 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 82 states. [2018-10-03 08:45:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:33,418 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-10-03 08:45:33,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 08:45:33,418 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-03 08:45:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:33,418 INFO L225 Difference]: With dead ends: 248 [2018-10-03 08:45:33,418 INFO L226 Difference]: Without dead ends: 165 [2018-10-03 08:45:33,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3441, Invalid=11321, Unknown=0, NotChecked=0, Total=14762 [2018-10-03 08:45:33,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-03 08:45:33,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-03 08:45:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-03 08:45:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-03 08:45:33,454 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-10-03 08:45:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:33,454 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-03 08:45:33,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:45:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-03 08:45:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-03 08:45:33,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:33,455 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-10-03 08:45:33,455 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:33,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:33,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1292352899, now seen corresponding path program 78 times [2018-10-03 08:45:33,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:33,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:33,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:33,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:33,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:34,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:34,236 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 [2018-10-03 08:45:34,244 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:45:34,385 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-03 08:45:34,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:34,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:34,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:34,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-03 08:45:34,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:45:34,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:45:34,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:45:34,485 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-10-03 08:45:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:35,479 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-10-03 08:45:35,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-03 08:45:35,479 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-10-03 08:45:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:35,480 INFO L225 Difference]: With dead ends: 173 [2018-10-03 08:45:35,480 INFO L226 Difference]: Without dead ends: 171 [2018-10-03 08:45:35,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:45:35,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-03 08:45:35,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-10-03 08:45:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-03 08:45:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-10-03 08:45:35,521 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-10-03 08:45:35,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:35,521 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-10-03 08:45:35,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:45:35,522 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-10-03 08:45:35,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-03 08:45:35,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:35,522 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-10-03 08:45:35,523 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:35,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:35,523 INFO L82 PathProgramCache]: Analyzing trace with hash -705654151, now seen corresponding path program 79 times [2018-10-03 08:45:35,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:35,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:35,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:35,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:35,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:37,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:37,900 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 [2018-10-03 08:45:37,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:45:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:38,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:38,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:38,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-03 08:45:38,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-03 08:45:38,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-03 08:45:38,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=5167, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:45:38,056 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 84 states. [2018-10-03 08:45:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:41,611 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-10-03 08:45:41,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-03 08:45:41,611 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-03 08:45:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:41,612 INFO L225 Difference]: With dead ends: 254 [2018-10-03 08:45:41,612 INFO L226 Difference]: Without dead ends: 169 [2018-10-03 08:45:41,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3609, Invalid=11891, Unknown=0, NotChecked=0, Total=15500 [2018-10-03 08:45:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-03 08:45:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-03 08:45:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-03 08:45:41,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-10-03 08:45:41,651 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-10-03 08:45:41,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:41,652 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-10-03 08:45:41,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-03 08:45:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-10-03 08:45:41,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-03 08:45:41,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:41,653 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-10-03 08:45:41,653 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:41,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:41,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1476855373, now seen corresponding path program 80 times [2018-10-03 08:45:41,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:41,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:41,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:41,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:45:41,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:42,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:42,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:45:42,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:45:42,671 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:45:42,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:42,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:42,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:42,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-10-03 08:45:42,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:45:42,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:45:42,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:45:42,769 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2018-10-03 08:45:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:44,010 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-10-03 08:45:44,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-03 08:45:44,011 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2018-10-03 08:45:44,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:44,012 INFO L225 Difference]: With dead ends: 177 [2018-10-03 08:45:44,012 INFO L226 Difference]: Without dead ends: 175 [2018-10-03 08:45:44,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2928, Invalid=4904, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:45:44,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-03 08:45:44,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-10-03 08:45:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-03 08:45:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-03 08:45:44,051 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-10-03 08:45:44,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:44,051 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-03 08:45:44,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:45:44,051 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-03 08:45:44,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-03 08:45:44,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:44,052 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-10-03 08:45:44,052 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:44,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:44,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1918872529, now seen corresponding path program 81 times [2018-10-03 08:45:44,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:44,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:44,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:44,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:44,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:46,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:46,056 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 [2018-10-03 08:45:46,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:45:46,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-03 08:45:46,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:46,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:46,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:46,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-03 08:45:46,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 08:45:46,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 08:45:46,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:45:46,311 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 86 states. [2018-10-03 08:45:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:50,098 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-10-03 08:45:50,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-03 08:45:50,099 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-03 08:45:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:50,099 INFO L225 Difference]: With dead ends: 260 [2018-10-03 08:45:50,099 INFO L226 Difference]: Without dead ends: 173 [2018-10-03 08:45:50,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3781, Invalid=12475, Unknown=0, NotChecked=0, Total=16256 [2018-10-03 08:45:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-03 08:45:50,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-03 08:45:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-03 08:45:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-10-03 08:45:50,139 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-10-03 08:45:50,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:50,139 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-10-03 08:45:50,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 08:45:50,140 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-10-03 08:45:50,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-03 08:45:50,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:50,140 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-10-03 08:45:50,141 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:50,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:50,141 INFO L82 PathProgramCache]: Analyzing trace with hash -900821399, now seen corresponding path program 82 times [2018-10-03 08:45:50,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:50,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:50,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:50,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:50,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:51,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:51,003 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 [2018-10-03 08:45:51,012 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:45:51,118 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:45:51,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:51,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:51,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:51,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-10-03 08:45:51,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:45:51,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:45:51,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:45:51,216 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-10-03 08:45:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:52,262 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-10-03 08:45:52,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-03 08:45:52,262 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-10-03 08:45:52,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:52,263 INFO L225 Difference]: With dead ends: 181 [2018-10-03 08:45:52,263 INFO L226 Difference]: Without dead ends: 179 [2018-10-03 08:45:52,264 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 [2018-10-03 08:45:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-03 08:45:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-10-03 08:45:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-03 08:45:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-10-03 08:45:52,311 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2018-10-03 08:45:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:52,311 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-10-03 08:45:52,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:45:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-10-03 08:45:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-03 08:45:52,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:52,312 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-10-03 08:45:52,312 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:52,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:52,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1893962597, now seen corresponding path program 83 times [2018-10-03 08:45:52,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:52,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:52,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:52,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:52,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:54,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:54,676 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 [2018-10-03 08:45:54,684 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:45:54,842 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-03 08:45:54,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:54,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:54,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:54,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-03 08:45:54,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-03 08:45:54,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-03 08:45:54,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=5677, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:45:54,901 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 88 states. [2018-10-03 08:45:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:57,050 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2018-10-03 08:45:57,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-03 08:45:57,050 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-03 08:45:57,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:57,051 INFO L225 Difference]: With dead ends: 266 [2018-10-03 08:45:57,051 INFO L226 Difference]: Without dead ends: 177 [2018-10-03 08:45:57,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3957, Invalid=13073, Unknown=0, NotChecked=0, Total=17030 [2018-10-03 08:45:57,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-03 08:45:57,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-03 08:45:57,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-03 08:45:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-10-03 08:45:57,091 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2018-10-03 08:45:57,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:57,091 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-10-03 08:45:57,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-03 08:45:57,091 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-10-03 08:45:57,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-03 08:45:57,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:57,092 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-10-03 08:45:57,092 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:57,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash -619306849, now seen corresponding path program 84 times [2018-10-03 08:45:57,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:57,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:57,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:57,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:57,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:57,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:57,956 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 [2018-10-03 08:45:57,963 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:45:58,121 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-03 08:45:58,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:58,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:58,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:58,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-10-03 08:45:58,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:45:58,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:45:58,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:45:58,206 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 49 states. [2018-10-03 08:45:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:59,491 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-10-03 08:45:59,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-03 08:45:59,492 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2018-10-03 08:45:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:59,493 INFO L225 Difference]: With dead ends: 185 [2018-10-03 08:45:59,493 INFO L226 Difference]: Without dead ends: 183 [2018-10-03 08:45:59,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3199, Invalid=5357, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:45:59,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-03 08:45:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-10-03 08:45:59,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-03 08:45:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-10-03 08:45:59,537 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-10-03 08:45:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:59,537 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-10-03 08:45:59,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:45:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-10-03 08:45:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-03 08:45:59,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:59,538 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-10-03 08:45:59,538 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:59,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:59,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1846505499, now seen corresponding path program 85 times [2018-10-03 08:45:59,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:59,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:59,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:59,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:59,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:01,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:01,707 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 [2018-10-03 08:46:01,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:46:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:01,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:01,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:01,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-03 08:46:01,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-03 08:46:01,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-03 08:46:01,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:46:01,872 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 90 states. [2018-10-03 08:46:04,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:04,433 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2018-10-03 08:46:04,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-03 08:46:04,433 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-03 08:46:04,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:04,434 INFO L225 Difference]: With dead ends: 272 [2018-10-03 08:46:04,434 INFO L226 Difference]: Without dead ends: 181 [2018-10-03 08:46:04,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4137, Invalid=13685, Unknown=0, NotChecked=0, Total=17822 [2018-10-03 08:46:04,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-03 08:46:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-03 08:46:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-03 08:46:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-10-03 08:46:04,476 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-10-03 08:46:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:04,476 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-10-03 08:46:04,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-03 08:46:04,476 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-10-03 08:46:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-03 08:46:04,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:04,477 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-10-03 08:46:04,477 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:04,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:04,477 INFO L82 PathProgramCache]: Analyzing trace with hash 895799381, now seen corresponding path program 86 times [2018-10-03 08:46:04,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:04,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:04,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:04,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:46:04,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:05,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:05,392 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 [2018-10-03 08:46:05,399 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:46:05,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:46:05,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:05,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:05,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:05,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-10-03 08:46:05,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:46:05,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:46:05,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:46:05,607 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-10-03 08:46:06,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:06,744 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2018-10-03 08:46:06,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-03 08:46:06,744 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-10-03 08:46:06,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:06,745 INFO L225 Difference]: With dead ends: 189 [2018-10-03 08:46:06,745 INFO L226 Difference]: Without dead ends: 187 [2018-10-03 08:46:06,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:46:06,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-03 08:46:06,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2018-10-03 08:46:06,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-03 08:46:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-10-03 08:46:06,790 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2018-10-03 08:46:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:06,790 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-10-03 08:46:06,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:46:06,791 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-10-03 08:46:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-03 08:46:06,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:06,791 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-10-03 08:46:06,791 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:06,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:06,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1869679185, now seen corresponding path program 87 times [2018-10-03 08:46:06,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:06,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:06,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:06,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:06,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:09,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:09,404 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 [2018-10-03 08:46:09,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:46:09,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-03 08:46:09,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:09,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:09,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:09,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-03 08:46:09,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-03 08:46:09,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-03 08:46:09,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:46:09,654 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 92 states. [2018-10-03 08:46:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:12,639 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2018-10-03 08:46:12,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-03 08:46:12,639 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-03 08:46:12,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:12,640 INFO L225 Difference]: With dead ends: 278 [2018-10-03 08:46:12,640 INFO L226 Difference]: Without dead ends: 185 [2018-10-03 08:46:12,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4321, Invalid=14311, Unknown=0, NotChecked=0, Total=18632 [2018-10-03 08:46:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-03 08:46:12,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-03 08:46:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-03 08:46:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-10-03 08:46:12,684 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2018-10-03 08:46:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:12,685 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-10-03 08:46:12,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-03 08:46:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-10-03 08:46:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-03 08:46:12,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:12,685 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-10-03 08:46:12,686 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:12,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:12,686 INFO L82 PathProgramCache]: Analyzing trace with hash -800604789, now seen corresponding path program 88 times [2018-10-03 08:46:12,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:12,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:12,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:12,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:12,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:13,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:13,632 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 [2018-10-03 08:46:13,639 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:46:13,753 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:46:13,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:13,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:13,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:13,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2018-10-03 08:46:13,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:46:13,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:46:13,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:46:13,860 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 51 states. [2018-10-03 08:46:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:15,095 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-10-03 08:46:15,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-03 08:46:15,096 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 184 [2018-10-03 08:46:15,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:15,096 INFO L225 Difference]: With dead ends: 193 [2018-10-03 08:46:15,096 INFO L226 Difference]: Without dead ends: 191 [2018-10-03 08:46:15,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3482, Invalid=5830, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:46:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-03 08:46:15,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2018-10-03 08:46:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-03 08:46:15,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-10-03 08:46:15,148 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-10-03 08:46:15,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:15,149 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-10-03 08:46:15,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:46:15,149 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-10-03 08:46:15,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-03 08:46:15,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:15,150 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-10-03 08:46:15,150 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:15,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:15,150 INFO L82 PathProgramCache]: Analyzing trace with hash -582123001, now seen corresponding path program 89 times [2018-10-03 08:46:15,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:15,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:15,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:15,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:15,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:17,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:17,504 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 [2018-10-03 08:46:17,511 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:46:17,686 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-03 08:46:17,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:17,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:17,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:17,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-03 08:46:17,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-03 08:46:17,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-03 08:46:17,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:46:17,749 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 94 states. [2018-10-03 08:46:19,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:19,876 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2018-10-03 08:46:19,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-03 08:46:19,877 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-03 08:46:19,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:19,877 INFO L225 Difference]: With dead ends: 284 [2018-10-03 08:46:19,877 INFO L226 Difference]: Without dead ends: 189 [2018-10-03 08:46:19,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4509, Invalid=14951, Unknown=0, NotChecked=0, Total=19460 [2018-10-03 08:46:19,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-03 08:46:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-03 08:46:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-03 08:46:19,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-10-03 08:46:19,922 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-10-03 08:46:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:19,922 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-10-03 08:46:19,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-03 08:46:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-10-03 08:46:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-03 08:46:19,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:19,923 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-10-03 08:46:19,923 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:19,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:19,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1060894655, now seen corresponding path program 90 times [2018-10-03 08:46:19,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:19,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:19,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:19,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:19,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:21,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:21,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:46:21,037 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:46:21,214 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-10-03 08:46:21,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:21,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:21,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:21,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-10-03 08:46:21,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:46:21,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:46:21,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:46:21,317 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-10-03 08:46:22,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:22,539 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2018-10-03 08:46:22,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-03 08:46:22,539 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-10-03 08:46:22,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:22,541 INFO L225 Difference]: With dead ends: 197 [2018-10-03 08:46:22,541 INFO L226 Difference]: Without dead ends: 195 [2018-10-03 08:46:22,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3628, Invalid=6074, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:46:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-03 08:46:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2018-10-03 08:46:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-03 08:46:22,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-10-03 08:46:22,591 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2018-10-03 08:46:22,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:22,591 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-10-03 08:46:22,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:46:22,591 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-10-03 08:46:22,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-03 08:46:22,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:22,592 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-10-03 08:46:22,592 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:22,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:22,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1612581059, now seen corresponding path program 91 times [2018-10-03 08:46:22,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:22,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:22,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:22,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:22,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:25,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:25,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:46:25,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:46:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:25,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:25,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:25,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-03 08:46:25,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-03 08:46:25,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-03 08:46:25,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:46:25,506 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 96 states. [2018-10-03 08:46:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:28,790 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2018-10-03 08:46:28,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-03 08:46:28,790 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-03 08:46:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:28,791 INFO L225 Difference]: With dead ends: 290 [2018-10-03 08:46:28,791 INFO L226 Difference]: Without dead ends: 193 [2018-10-03 08:46:28,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4701, Invalid=15605, Unknown=0, NotChecked=0, Total=20306 [2018-10-03 08:46:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-03 08:46:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-03 08:46:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-03 08:46:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-10-03 08:46:28,839 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2018-10-03 08:46:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:28,839 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-10-03 08:46:28,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-03 08:46:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-10-03 08:46:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-03 08:46:28,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:28,840 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-10-03 08:46:28,840 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:28,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:28,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1003933815, now seen corresponding path program 92 times [2018-10-03 08:46:28,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:28,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:28,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:28,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:46:28,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:30,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:30,213 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 [2018-10-03 08:46:30,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:46:30,335 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:46:30,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:30,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:30,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:30,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2018-10-03 08:46:30,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:46:30,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:46:30,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:46:30,439 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 53 states. [2018-10-03 08:46:31,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:31,693 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2018-10-03 08:46:31,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-03 08:46:31,693 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 192 [2018-10-03 08:46:31,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:31,694 INFO L225 Difference]: With dead ends: 201 [2018-10-03 08:46:31,694 INFO L226 Difference]: Without dead ends: 199 [2018-10-03 08:46:31,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3777, Invalid=6323, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:46:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-03 08:46:31,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-10-03 08:46:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-03 08:46:31,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-10-03 08:46:31,761 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-10-03 08:46:31,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:31,762 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-10-03 08:46:31,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:46:31,762 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-10-03 08:46:31,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-03 08:46:31,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:31,762 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-10-03 08:46:31,763 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:31,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:31,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1587312141, now seen corresponding path program 93 times [2018-10-03 08:46:31,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:31,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:31,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:31,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:31,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:34,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:34,776 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 [2018-10-03 08:46:34,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:46:34,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-03 08:46:34,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:34,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:35,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:35,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-03 08:46:35,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-03 08:46:35,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-03 08:46:35,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:46:35,034 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 98 states. [2018-10-03 08:46:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:38,458 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2018-10-03 08:46:38,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-03 08:46:38,458 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-03 08:46:38,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:38,459 INFO L225 Difference]: With dead ends: 296 [2018-10-03 08:46:38,459 INFO L226 Difference]: Without dead ends: 197 [2018-10-03 08:46:38,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4897, Invalid=16273, Unknown=0, NotChecked=0, Total=21170 [2018-10-03 08:46:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-03 08:46:38,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-03 08:46:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-03 08:46:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-10-03 08:46:38,509 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-10-03 08:46:38,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:38,509 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-10-03 08:46:38,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-03 08:46:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-10-03 08:46:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-03 08:46:38,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:38,510 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-10-03 08:46:38,510 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:38,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:38,510 INFO L82 PathProgramCache]: Analyzing trace with hash 410334765, now seen corresponding path program 94 times [2018-10-03 08:46:38,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:38,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:38,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:38,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:38,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:39,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:39,956 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) [2018-10-03 08:46:39,965 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:46:40,086 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:46:40,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:40,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:40,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:40,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-10-03 08:46:40,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:46:40,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:46:40,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:46:40,198 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-10-03 08:46:41,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:41,513 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-10-03 08:46:41,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-03 08:46:41,513 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-10-03 08:46:41,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:41,514 INFO L225 Difference]: With dead ends: 205 [2018-10-03 08:46:41,514 INFO L226 Difference]: Without dead ends: 203 [2018-10-03 08:46:41,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:46:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-03 08:46:41,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-10-03 08:46:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-03 08:46:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-10-03 08:46:41,580 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2018-10-03 08:46:41,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:41,580 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-10-03 08:46:41,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:46:41,580 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-10-03 08:46:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-03 08:46:41,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:41,581 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-10-03 08:46:41,581 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:41,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:41,581 INFO L82 PathProgramCache]: Analyzing trace with hash -805348823, now seen corresponding path program 95 times [2018-10-03 08:46:41,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:41,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:41,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:41,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:41,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:44,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:44,301 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 [2018-10-03 08:46:44,311 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:46:44,510 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-03 08:46:44,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:44,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:44,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:44,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-03 08:46:44,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-03 08:46:44,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-03 08:46:44,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=7351, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:46:44,576 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 100 states. [2018-10-03 08:46:48,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:48,145 INFO L93 Difference]: Finished difference Result 302 states and 304 transitions. [2018-10-03 08:46:48,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-03 08:46:48,145 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-10-03 08:46:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:48,146 INFO L225 Difference]: With dead ends: 302 [2018-10-03 08:46:48,146 INFO L226 Difference]: Without dead ends: 201 [2018-10-03 08:46:48,147 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 [2018-10-03 08:46:48,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-03 08:46:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-03 08:46:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-03 08:46:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-10-03 08:46:48,199 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2018-10-03 08:46:48,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:48,199 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-10-03 08:46:48,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-03 08:46:48,199 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-10-03 08:46:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-03 08:46:48,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:48,200 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-10-03 08:46:48,200 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:48,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:48,201 INFO L82 PathProgramCache]: Analyzing trace with hash -779331229, now seen corresponding path program 96 times [2018-10-03 08:46:48,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:48,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:48,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:48,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:48,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:49,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:49,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:46:49,354 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:46:49,549 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-03 08:46:49,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:49,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:49,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:49,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2018-10-03 08:46:49,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:46:49,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:46:49,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:46:49,658 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 55 states. [2018-10-03 08:46:51,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:51,060 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2018-10-03 08:46:51,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-03 08:46:51,060 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 200 [2018-10-03 08:46:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:51,061 INFO L225 Difference]: With dead ends: 209 [2018-10-03 08:46:51,061 INFO L226 Difference]: Without dead ends: 207 [2018-10-03 08:46:51,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4084, Invalid=6836, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:46:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-03 08:46:51,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-10-03 08:46:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-03 08:46:51,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-10-03 08:46:51,116 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-10-03 08:46:51,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:51,117 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-10-03 08:46:51,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:46:51,117 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-10-03 08:46:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-03 08:46:51,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:51,117 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-10-03 08:46:51,118 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:51,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:51,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1613068321, now seen corresponding path program 97 times [2018-10-03 08:46:51,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:51,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:51,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:51,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:51,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:53,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:53,889 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 [2018-10-03 08:46:53,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:46:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:54,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:54,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:54,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-03 08:46:54,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-03 08:46:54,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-03 08:46:54,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:46:54,080 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 102 states. [2018-10-03 08:46:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:57,967 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2018-10-03 08:46:57,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-03 08:46:57,967 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-10-03 08:46:57,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:57,968 INFO L225 Difference]: With dead ends: 308 [2018-10-03 08:46:57,968 INFO L226 Difference]: Without dead ends: 205 [2018-10-03 08:46:57,969 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 [2018-10-03 08:46:57,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-03 08:46:58,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-03 08:46:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-03 08:46:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2018-10-03 08:46:58,023 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2018-10-03 08:46:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:58,023 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2018-10-03 08:46:58,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-03 08:46:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2018-10-03 08:46:58,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-03 08:46:58,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:58,024 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 1, 1, 1, 1] [2018-10-03 08:46:58,024 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:58,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash 134306329, now seen corresponding path program 98 times [2018-10-03 08:46:58,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:58,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:58,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:58,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:46:58,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:59,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:59,220 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 [2018-10-03 08:46:59,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:46:59,349 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:46:59,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:59,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:59,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:59,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2018-10-03 08:46:59,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:46:59,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:46:59,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:46:59,462 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 56 states. [2018-10-03 08:47:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:47:01,068 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2018-10-03 08:47:01,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-03 08:47:01,068 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 204 [2018-10-03 08:47:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:47:01,069 INFO L225 Difference]: With dead ends: 213 [2018-10-03 08:47:01,069 INFO L226 Difference]: Without dead ends: 211 [2018-10-03 08:47:01,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4242, Invalid=7100, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:47:01,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-03 08:47:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2018-10-03 08:47:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-03 08:47:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-10-03 08:47:01,126 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2018-10-03 08:47:01,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:47:01,126 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-10-03 08:47:01,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:47:01,126 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-10-03 08:47:01,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-03 08:47:01,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:47:01,127 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2018-10-03 08:47:01,127 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:47:01,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:47:01,127 INFO L82 PathProgramCache]: Analyzing trace with hash 219296533, now seen corresponding path program 99 times [2018-10-03 08:47:01,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:47:01,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:47:01,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:47:01,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:47:01,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:47:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:47:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2550 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:47:04,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:47:04,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:47:04,043 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:47:04,247 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-03 08:47:04,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:47:04,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:47:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2550 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:47:04,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:47:04,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-03 08:47:04,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-03 08:47:04,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-03 08:47:04,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2755, Invalid=7957, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:47:04,314 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 104 states. [2018-10-03 08:47:08,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:47:08,399 INFO L93 Difference]: Finished difference Result 314 states and 316 transitions. [2018-10-03 08:47:08,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-03 08:47:08,399 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-10-03 08:47:08,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:47:08,400 INFO L225 Difference]: With dead ends: 314 [2018-10-03 08:47:08,400 INFO L226 Difference]: Without dead ends: 209 [2018-10-03 08:47:08,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5509, Invalid=18361, Unknown=0, NotChecked=0, Total=23870 [2018-10-03 08:47:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-03 08:47:08,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-10-03 08:47:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-03 08:47:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2018-10-03 08:47:08,460 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2018-10-03 08:47:08,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:47:08,460 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2018-10-03 08:47:08,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-03 08:47:08,460 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2018-10-03 08:47:08,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-03 08:47:08,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:47:08,461 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 50, 1, 1, 1, 1] [2018-10-03 08:47:08,461 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:47:08,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:47:08,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2068752305, now seen corresponding path program 100 times [2018-10-03 08:47:08,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:47:08,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:47:08,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:47:08,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:47:08,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:47:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 08:47:08,871 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:47:08,875 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:47:08,875 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:47:08 BoogieIcfgContainer [2018-10-03 08:47:08,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:47:08,876 INFO L168 Benchmark]: Toolchain (without parser) took 238049.21 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 151.5 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 324.2 MB). Peak memory consumption was 475.7 MB. Max. memory is 7.1 GB. [2018-10-03 08:47:08,877 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 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. [2018-10-03 08:47:08,877 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.58 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. [2018-10-03 08:47:08,878 INFO L168 Benchmark]: Boogie Preprocessor took 20.67 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. [2018-10-03 08:47:08,878 INFO L168 Benchmark]: RCFGBuilder took 377.15 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. [2018-10-03 08:47:08,878 INFO L168 Benchmark]: TraceAbstraction took 237604.96 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 151.5 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 303.0 MB). Peak memory consumption was 454.6 MB. Max. memory is 7.1 GB. [2018-10-03 08:47:08,880 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 0.25 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 40.58 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.67 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 377.15 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 237604.96 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 151.5 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 303.0 MB). Peak memory consumption was 454.6 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 209 with TraceHistMax 52, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 30 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 237.5s OverallTime, 102 OverallIterations, 52 TraceHistogramMax, 123.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1731 SDtfs, 1117 SDslu, 8192 SDs, 0 SdLazy, 79110 SolverSat, 5797 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18646 GetRequests, 11870 SyntacticMatches, 0 SemanticMatches, 6776 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111871 ImplicationChecksByTransitivity, 149.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=209occurred in iteration=101, 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: 2.3s AutomataMinimizationTime, 101 MinimizatonAttempts, 200 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 8.2s SatisfiabilityAnalysisTime, 96.4s InterpolantComputationTime, 21398 NumberOfCodeBlocks, 21398 NumberOfCodeBlocksAsserted, 1507 NumberOfCheckSat, 21198 ConstructedInterpolants, 0 QuantifiedInterpolants, 8724709 SizeOfPredicates, 297 NumberOfNonLiveVariables, 42274 ConjunctsInSsa, 5592 ConjunctsInUnsatCore, 200 InterpolantComputations, 2 PerfectInterpolantSequences, 176798/348498 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-0-2018-10-03_08-47-08-890.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-0-2018-10-03_08-47-08-890.csv Completed graceful shutdown