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/toy/tooDifficultLoopInvariant/ArrayInit02.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:23:01,245 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:23:01,248 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:23:01,264 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-04 09:23:01,320 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 09:23:01,343 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:23:01,343 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:23:01,344 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:23:01,344 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:23:01,345 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:23:01,348 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:23:01,348 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:23:01,348 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:23:01,349 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:23:01,349 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:23:01,349 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:23:01,349 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:23:01,349 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:23:01,349 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:23:01,350 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:23:01,350 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:23:01,350 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:23:01,351 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:23:01,351 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:23:01,351 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:23:01,351 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:23:01,351 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:23:01,351 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:23:01,353 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:23:01,353 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:23:01,353 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:23:01,353 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:23:01,354 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:23:01,354 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:23:01,354 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:23:01,409 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:23:01,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:23:01,427 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:23:01,430 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:23:01,431 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:23:01,432 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl [2018-10-04 09:23:01,432 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl' [2018-10-04 09:23:01,491 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:23:01,493 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:23:01,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:23:01,495 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:23:01,495 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:23:01,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:01" (1/1) ... [2018-10-04 09:23:01,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:01" (1/1) ... [2018-10-04 09:23:01,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:23:01,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:23:01,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:23:01,538 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:23:01,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:01" (1/1) ... [2018-10-04 09:23:01,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:01" (1/1) ... [2018-10-04 09:23:01,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:01" (1/1) ... [2018-10-04 09:23:01,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:01" (1/1) ... [2018-10-04 09:23:01,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:01" (1/1) ... [2018-10-04 09:23:01,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:01" (1/1) ... [2018-10-04 09:23:01,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:01" (1/1) ... [2018-10-04 09:23:01,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:23:01,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:23:01,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:23:01,565 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:23:01,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:23:01,634 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-04 09:23:01,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 09:23:01,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 09:23:01,972 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 09:23:01,973 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:23:01 BoogieIcfgContainer [2018-10-04 09:23:01,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:23:01,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:23:01,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:23:01,978 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:23:01,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:23:01" (1/2) ... [2018-10-04 09:23:01,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a03265c and model type ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:23:01, skipping insertion in model container [2018-10-04 09:23:01,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:23:01" (2/2) ... [2018-10-04 09:23:01,981 INFO L112 eAbstractionObserver]: Analyzing ICFG ArrayInit02.bpl [2018-10-04 09:23:01,990 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:23:01,997 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:23:02,046 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:23:02,047 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:23:02,048 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:23:02,048 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:23:02,048 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:23:02,048 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:23:02,048 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:23:02,048 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:23:02,049 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:23:02,065 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-04 09:23:02,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 09:23:02,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:02,072 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 09:23:02,073 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:02,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:02,080 INFO L82 PathProgramCache]: Analyzing trace with hash 900035954, now seen corresponding path program 1 times [2018-10-04 09:23:02,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:02,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:02,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:02,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:02,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:02,329 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:23:02,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 09:23:02,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:23:02,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:23:02,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:23:02,355 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2018-10-04 09:23:02,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:02,544 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-10-04 09:23:02,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:23:02,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 09:23:02,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:02,558 INFO L225 Difference]: With dead ends: 26 [2018-10-04 09:23:02,558 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:23:02,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:23:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:23:02,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-10-04 09:23:02,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:23:02,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2018-10-04 09:23:02,597 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2018-10-04 09:23:02,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:02,598 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2018-10-04 09:23:02,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:23:02,598 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2018-10-04 09:23:02,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:23:02,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:02,599 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:23:02,599 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:02,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:02,599 INFO L82 PathProgramCache]: Analyzing trace with hash 429804648, now seen corresponding path program 1 times [2018-10-04 09:23:02,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:02,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:02,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:02,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:02,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:02,714 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:23:02,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-04 09:23:02,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:23:02,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:23:02,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:23:02,716 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2018-10-04 09:23:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:02,780 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-10-04 09:23:02,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:23:02,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-04 09:23:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:02,782 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:23:02,782 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:23:02,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:23:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:23:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-04 09:23:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 09:23:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2018-10-04 09:23:02,788 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2018-10-04 09:23:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:02,789 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2018-10-04 09:23:02,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:23:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2018-10-04 09:23:02,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:23:02,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:02,790 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:23:02,791 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:02,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:02,791 INFO L82 PathProgramCache]: Analyzing trace with hash 429806570, now seen corresponding path program 1 times [2018-10-04 09:23:02,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:02,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:02,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:02,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:02,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-04 09:23:02,821 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:23:02,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 09:23:02,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:23:02,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:23:02,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:23:02,823 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 3 states. [2018-10-04 09:23:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:02,860 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2018-10-04 09:23:02,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:23:02,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-04 09:23:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:02,861 INFO L225 Difference]: With dead ends: 24 [2018-10-04 09:23:02,862 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:23:02,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:23:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:23:02,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-10-04 09:23:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:23:02,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-04 09:23:02,866 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-04 09:23:02,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:02,866 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-04 09:23:02,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:23:02,866 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-04 09:23:02,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:23:02,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:02,867 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:23:02,867 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:02,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:02,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2090155286, now seen corresponding path program 1 times [2018-10-04 09:23:02,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:02,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:02,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:02,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:02,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:03,320 WARN L178 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-04 09:23:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:03,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:03,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:03,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:03,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:03,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:03,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-04 09:23:03,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:23:03,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:23:03,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:23:03,563 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2018-10-04 09:23:03,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:03,827 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-10-04 09:23:03,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:23:03,830 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2018-10-04 09:23:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:03,830 INFO L225 Difference]: With dead ends: 26 [2018-10-04 09:23:03,831 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:23:03,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:23:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:23:03,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-10-04 09:23:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:23:03,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-04 09:23:03,836 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-10-04 09:23:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:03,836 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-04 09:23:03,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:23:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-04 09:23:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:23:03,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:03,838 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:23:03,838 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:03,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:03,838 INFO L82 PathProgramCache]: Analyzing trace with hash -368470767, now seen corresponding path program 1 times [2018-10-04 09:23:03,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:03,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:03,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:03,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:03,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:03,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:03,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:03,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:03,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:04,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:04,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-04 09:23:04,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:23:04,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:23:04,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:23:04,032 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2018-10-04 09:23:04,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:04,433 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-04 09:23:04,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:23:04,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 09:23:04,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:04,434 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:23:04,434 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:23:04,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:23:04,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:23:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-10-04 09:23:04,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 09:23:04,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-10-04 09:23:04,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-10-04 09:23:04,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:04,439 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-10-04 09:23:04,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:23:04,440 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-10-04 09:23:04,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 09:23:04,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:04,440 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:23:04,441 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:04,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:04,441 INFO L82 PathProgramCache]: Analyzing trace with hash -256855911, now seen corresponding path program 2 times [2018-10-04 09:23:04,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:04,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:04,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:04,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:04,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:04,747 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2018-10-04 09:23:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:04,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:04,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:04,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:23:04,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:23:04,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:04,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:05,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:05,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-10-04 09:23:05,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:23:05,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:23:05,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:23:05,142 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 15 states. [2018-10-04 09:23:05,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:05,931 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-10-04 09:23:05,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:23:05,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2018-10-04 09:23:05,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:05,933 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:23:05,933 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:23:05,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:23:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:23:05,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-10-04 09:23:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:23:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-04 09:23:05,940 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2018-10-04 09:23:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:05,940 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-04 09:23:05,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:23:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-04 09:23:05,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 09:23:05,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:05,941 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 09:23:05,941 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:05,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:05,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1324912968, now seen corresponding path program 3 times [2018-10-04 09:23:05,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:05,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:05,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:05,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:05,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:06,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:06,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:06,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:23:06,197 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 09:23:06,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:06,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:06,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:06,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-10-04 09:23:06,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:23:06,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:23:06,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:23:06,344 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2018-10-04 09:23:06,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:06,885 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-10-04 09:23:06,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:23:06,886 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2018-10-04 09:23:06,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:06,887 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:23:06,887 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:23:06,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:23:06,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:23:06,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-04 09:23:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:23:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-04 09:23:06,894 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-10-04 09:23:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:06,895 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-04 09:23:06,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:23:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-04 09:23:06,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 09:23:06,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:06,896 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:23:06,897 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:06,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:06,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1588570591, now seen corresponding path program 4 times [2018-10-04 09:23:06,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:06,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:06,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:06,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:06,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:07,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:07,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:07,033 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:23:07,040 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:23:07,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:07,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:07,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:07,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-04 09:23:07,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:23:07,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:23:07,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:23:07,160 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-04 09:23:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:07,617 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-10-04 09:23:07,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:23:07,618 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-04 09:23:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:07,619 INFO L225 Difference]: With dead ends: 60 [2018-10-04 09:23:07,619 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:23:07,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:23:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:23:07,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-10-04 09:23:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 09:23:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-04 09:23:07,626 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-10-04 09:23:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:07,626 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-04 09:23:07,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:23:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-04 09:23:07,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 09:23:07,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:07,627 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:23:07,628 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:07,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:07,628 INFO L82 PathProgramCache]: Analyzing trace with hash 366737255, now seen corresponding path program 5 times [2018-10-04 09:23:07,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:07,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:07,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:07,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:07,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:07,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:07,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:07,982 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:23:07,998 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-04 09:23:07,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:08,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:08,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:08,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-10-04 09:23:08,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:23:08,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:23:08,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:23:08,200 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 17 states. [2018-10-04 09:23:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:08,824 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-10-04 09:23:08,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:23:08,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-10-04 09:23:08,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:08,828 INFO L225 Difference]: With dead ends: 64 [2018-10-04 09:23:08,828 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 09:23:08,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:23:08,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 09:23:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2018-10-04 09:23:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 09:23:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-04 09:23:08,835 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-10-04 09:23:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:08,835 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-04 09:23:08,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:23:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-04 09:23:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 09:23:08,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:08,836 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-04 09:23:08,837 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:08,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:08,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1079885042, now seen corresponding path program 6 times [2018-10-04 09:23:08,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:08,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:08,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:08,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:08,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:08,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:08,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:08,994 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:23:09,036 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 09:23:09,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:09,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:09,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:09,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-04 09:23:09,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:23:09,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:23:09,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:23:09,178 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2018-10-04 09:23:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:09,366 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-10-04 09:23:09,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:23:09,367 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2018-10-04 09:23:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:09,368 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:23:09,368 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 09:23:09,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:23:09,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 09:23:09,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-10-04 09:23:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 09:23:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-04 09:23:09,377 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2018-10-04 09:23:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:09,377 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-04 09:23:09,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:23:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-04 09:23:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 09:23:09,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:09,379 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-04 09:23:09,379 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:09,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:09,379 INFO L82 PathProgramCache]: Analyzing trace with hash -921359226, now seen corresponding path program 7 times [2018-10-04 09:23:09,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:09,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:09,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:09,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:09,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:09,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:09,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:09,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:09,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:09,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:09,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-10-04 09:23:09,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:23:09,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:23:09,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:23:09,968 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-10-04 09:23:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:10,676 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-10-04 09:23:10,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:23:10,677 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-10-04 09:23:10,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:10,678 INFO L225 Difference]: With dead ends: 79 [2018-10-04 09:23:10,679 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 09:23:10,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:23:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 09:23:10,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2018-10-04 09:23:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 09:23:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-04 09:23:10,687 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-10-04 09:23:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:10,687 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-04 09:23:10,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:23:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-04 09:23:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 09:23:10,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:10,689 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-04 09:23:10,689 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:10,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:10,690 INFO L82 PathProgramCache]: Analyzing trace with hash 451793069, now seen corresponding path program 8 times [2018-10-04 09:23:10,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:10,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:10,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:10,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:10,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:11,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:11,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:11,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:23:11,140 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:23:11,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:11,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:11,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:11,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-04 09:23:11,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:23:11,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:23:11,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:23:11,270 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2018-10-04 09:23:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:11,805 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-10-04 09:23:11,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:23:11,806 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-10-04 09:23:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:11,807 INFO L225 Difference]: With dead ends: 90 [2018-10-04 09:23:11,807 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:23:11,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:23:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:23:11,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-10-04 09:23:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 09:23:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-04 09:23:11,815 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2018-10-04 09:23:11,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:11,815 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-04 09:23:11,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:23:11,815 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-04 09:23:11,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 09:23:11,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:11,817 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-04 09:23:11,817 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:11,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:11,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1868574667, now seen corresponding path program 9 times [2018-10-04 09:23:11,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:11,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:11,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:11,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:11,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 5 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:12,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:12,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:12,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:23:12,230 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 09:23:12,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:12,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:12,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:12,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2018-10-04 09:23:12,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:23:12,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:23:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:23:12,781 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 31 states. [2018-10-04 09:23:15,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:15,524 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-10-04 09:23:15,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:23:15,524 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-10-04 09:23:15,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:15,526 INFO L225 Difference]: With dead ends: 116 [2018-10-04 09:23:15,526 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 09:23:15,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=469, Invalid=3953, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 09:23:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 09:23:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-10-04 09:23:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 09:23:15,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-04 09:23:15,537 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2018-10-04 09:23:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:15,537 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-04 09:23:15,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:23:15,538 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-04 09:23:15,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 09:23:15,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:15,539 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-04 09:23:15,539 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:15,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:15,539 INFO L82 PathProgramCache]: Analyzing trace with hash 2089942100, now seen corresponding path program 10 times [2018-10-04 09:23:15,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:15,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:15,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:15,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:15,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:15,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:15,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:15,870 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:23:15,881 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:23:15,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:15,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:16,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:16,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2018-10-04 09:23:16,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:23:16,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:23:16,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:23:16,170 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-04 09:23:17,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:17,321 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-10-04 09:23:17,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:23:17,322 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-04 09:23:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:17,323 INFO L225 Difference]: With dead ends: 109 [2018-10-04 09:23:17,323 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 09:23:17,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:23:17,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 09:23:17,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-10-04 09:23:17,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 09:23:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-04 09:23:17,334 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2018-10-04 09:23:17,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:17,335 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-04 09:23:17,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:23:17,335 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-04 09:23:17,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 09:23:17,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:17,336 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-04 09:23:17,336 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:17,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:17,336 INFO L82 PathProgramCache]: Analyzing trace with hash 549587323, now seen corresponding path program 11 times [2018-10-04 09:23:17,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:17,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:17,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:17,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:17,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:18,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:18,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:18,137 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:23:18,200 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 09:23:18,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:18,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:18,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:18,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-10-04 09:23:18,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:23:18,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:23:18,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:23:18,488 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2018-10-04 09:23:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:19,012 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2018-10-04 09:23:19,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:23:19,013 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-10-04 09:23:19,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:19,013 INFO L225 Difference]: With dead ends: 120 [2018-10-04 09:23:19,014 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 09:23:19,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:23:19,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 09:23:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-10-04 09:23:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 09:23:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-04 09:23:19,023 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2018-10-04 09:23:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:19,024 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-04 09:23:19,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:23:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-04 09:23:19,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 09:23:19,025 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:19,025 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-04 09:23:19,025 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:19,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:19,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1743111421, now seen corresponding path program 12 times [2018-10-04 09:23:19,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:19,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:19,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:19,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:19,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:19,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:19,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:19,626 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:23:19,648 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 09:23:19,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:19,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:20,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:20,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-10-04 09:23:20,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:23:20,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:23:20,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:23:20,042 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 29 states. [2018-10-04 09:23:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:21,909 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2018-10-04 09:23:21,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:23:21,909 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2018-10-04 09:23:21,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:21,911 INFO L225 Difference]: With dead ends: 124 [2018-10-04 09:23:21,911 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 09:23:21,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:23:21,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 09:23:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2018-10-04 09:23:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 09:23:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-10-04 09:23:21,922 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2018-10-04 09:23:21,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:21,923 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-10-04 09:23:21,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:23:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-10-04 09:23:21,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:23:21,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:21,924 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-04 09:23:21,924 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:21,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:21,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1415751510, now seen corresponding path program 13 times [2018-10-04 09:23:21,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:21,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:21,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:21,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:21,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:22,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:22,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:22,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:22,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:22,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:22,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-04 09:23:22,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:23:22,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:23:22,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:23:22,482 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 29 states. [2018-10-04 09:23:22,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:22,933 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-10-04 09:23:22,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:23:22,936 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2018-10-04 09:23:22,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:22,937 INFO L225 Difference]: With dead ends: 135 [2018-10-04 09:23:22,937 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 09:23:22,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:23:22,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 09:23:22,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-10-04 09:23:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 09:23:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-04 09:23:22,946 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-10-04 09:23:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:22,946 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-04 09:23:22,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:23:22,947 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-04 09:23:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 09:23:22,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:22,948 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-04 09:23:22,948 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:22,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:22,948 INFO L82 PathProgramCache]: Analyzing trace with hash 175889954, now seen corresponding path program 14 times [2018-10-04 09:23:22,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:22,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:22,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:22,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:22,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 8 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:23,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:23,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:23,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:23:23,402 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:23:23,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:23,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 128 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:24,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:24,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2018-10-04 09:23:24,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 09:23:24,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 09:23:24,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:23:24,192 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 43 states. [2018-10-04 09:23:26,512 WARN L178 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-10-04 09:23:27,020 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-04 09:23:27,664 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2018-10-04 09:23:28,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:28,470 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-10-04 09:23:28,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:23:28,470 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2018-10-04 09:23:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:28,471 INFO L225 Difference]: With dead ends: 173 [2018-10-04 09:23:28,472 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 09:23:28,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=829, Invalid=8483, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 09:23:28,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 09:23:28,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2018-10-04 09:23:28,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 09:23:28,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-04 09:23:28,486 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2018-10-04 09:23:28,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:28,486 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-04 09:23:28,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 09:23:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-04 09:23:28,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 09:23:28,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:28,487 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-04 09:23:28,488 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:28,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:28,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2036938705, now seen corresponding path program 15 times [2018-10-04 09:23:28,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:28,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:28,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:28,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:28,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 9 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:29,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:29,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:29,212 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:23:29,231 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 09:23:29,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:29,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 162 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:30,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:30,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2018-10-04 09:23:30,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:23:30,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:23:30,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:23:30,089 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 47 states. [2018-10-04 09:23:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:34,353 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-10-04 09:23:34,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 09:23:34,354 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2018-10-04 09:23:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:34,355 INFO L225 Difference]: With dead ends: 192 [2018-10-04 09:23:34,355 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 09:23:34,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2443 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=969, Invalid=10373, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 09:23:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 09:23:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2018-10-04 09:23:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 09:23:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-04 09:23:34,368 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2018-10-04 09:23:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:34,368 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-04 09:23:34,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:23:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-04 09:23:34,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 09:23:34,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:34,369 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-04 09:23:34,369 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:34,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:34,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1070649840, now seen corresponding path program 16 times [2018-10-04 09:23:34,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:34,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:34,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:34,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:34,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:34,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:34,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:34,907 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:23:34,921 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:23:34,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:34,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:35,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:35,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-10-04 09:23:35,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:23:35,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:23:35,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:23:35,349 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2018-10-04 09:23:37,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:37,747 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2018-10-04 09:23:37,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:23:37,748 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2018-10-04 09:23:37,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:37,750 INFO L225 Difference]: With dead ends: 169 [2018-10-04 09:23:37,750 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 09:23:37,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=319, Invalid=3221, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:23:37,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 09:23:37,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2018-10-04 09:23:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 09:23:37,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-04 09:23:37,764 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2018-10-04 09:23:37,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:37,764 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-04 09:23:37,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:23:37,764 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-04 09:23:37,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 09:23:37,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:37,765 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-04 09:23:37,765 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:37,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:37,766 INFO L82 PathProgramCache]: Analyzing trace with hash -685461225, now seen corresponding path program 17 times [2018-10-04 09:23:37,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:37,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:37,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:37,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:37,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:38,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:38,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:38,199 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:23:38,224 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 09:23:38,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:38,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:38,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:38,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-10-04 09:23:38,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:23:38,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:23:38,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:23:38,563 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 38 states. [2018-10-04 09:23:39,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:39,073 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2018-10-04 09:23:39,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:23:39,074 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2018-10-04 09:23:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:39,075 INFO L225 Difference]: With dead ends: 180 [2018-10-04 09:23:39,075 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 09:23:39,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:23:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 09:23:39,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-10-04 09:23:39,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 09:23:39,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-10-04 09:23:39,086 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2018-10-04 09:23:39,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:39,086 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-10-04 09:23:39,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:23:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-10-04 09:23:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 09:23:39,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:39,087 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-04 09:23:39,087 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:39,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:39,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1750415713, now seen corresponding path program 18 times [2018-10-04 09:23:39,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:39,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:39,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:39,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:39,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:39,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:39,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:39,806 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:23:39,830 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:23:39,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:39,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:40,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:40,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-10-04 09:23:40,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:23:40,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:23:40,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1534, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:23:40,331 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 41 states. [2018-10-04 09:23:43,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:43,159 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2018-10-04 09:23:43,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:23:43,167 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2018-10-04 09:23:43,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:43,168 INFO L225 Difference]: With dead ends: 184 [2018-10-04 09:23:43,168 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 09:23:43,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=359, Invalid=3801, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:23:43,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 09:23:43,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2018-10-04 09:23:43,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 09:23:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-04 09:23:43,184 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-10-04 09:23:43,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:43,185 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-04 09:23:43,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:23:43,185 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-04 09:23:43,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 09:23:43,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:43,186 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-04 09:23:43,186 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:43,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:43,187 INFO L82 PathProgramCache]: Analyzing trace with hash 310818374, now seen corresponding path program 19 times [2018-10-04 09:23:43,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:43,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:43,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:43,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:43,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:43,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:43,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:43,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:43,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:43,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:43,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-04 09:23:43,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:23:43,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:23:43,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:23:43,952 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2018-10-04 09:23:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:44,547 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-10-04 09:23:44,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:23:44,548 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2018-10-04 09:23:44,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:44,550 INFO L225 Difference]: With dead ends: 195 [2018-10-04 09:23:44,550 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 09:23:44,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=2159, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:23:44,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 09:23:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2018-10-04 09:23:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 09:23:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-04 09:23:44,562 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2018-10-04 09:23:44,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:44,562 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-04 09:23:44,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:23:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-04 09:23:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 09:23:44,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:44,563 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-04 09:23:44,563 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:44,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:44,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2005850046, now seen corresponding path program 20 times [2018-10-04 09:23:44,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:44,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:44,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:44,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:23:44,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:45,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:45,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:45,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:23:45,526 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:23:45,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:45,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 288 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:46,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:46,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 58 [2018-10-04 09:23:46,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:23:46,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:23:46,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=3030, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:23:46,786 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 59 states. [2018-10-04 09:23:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:53,269 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2018-10-04 09:23:53,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 09:23:53,269 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 93 [2018-10-04 09:23:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:53,270 INFO L225 Difference]: With dead ends: 249 [2018-10-04 09:23:53,270 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 09:23:53,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1449, Invalid=17183, Unknown=0, NotChecked=0, Total=18632 [2018-10-04 09:23:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 09:23:53,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2018-10-04 09:23:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 09:23:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-04 09:23:53,287 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2018-10-04 09:23:53,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:53,287 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-04 09:23:53,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:23:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-04 09:23:53,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 09:23:53,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:53,288 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-10-04 09:23:53,289 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:53,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1811736429, now seen corresponding path program 21 times [2018-10-04 09:23:53,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:53,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:53,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:53,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:53,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:53,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:53,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:53,928 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:23:53,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 09:23:53,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:53,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:54,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:54,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-10-04 09:23:54,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:23:54,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:23:54,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2040, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:23:54,698 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 47 states. [2018-10-04 09:23:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:58,158 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2018-10-04 09:23:58,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:23:58,159 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2018-10-04 09:23:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:58,160 INFO L225 Difference]: With dead ends: 214 [2018-10-04 09:23:58,161 INFO L226 Difference]: Without dead ends: 160 [2018-10-04 09:23:58,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=445, Invalid=5105, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 09:23:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-04 09:23:58,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2018-10-04 09:23:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 09:23:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-04 09:23:58,176 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2018-10-04 09:23:58,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:58,176 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-04 09:23:58,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:23:58,176 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-04 09:23:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 09:23:58,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:58,177 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-04 09:23:58,177 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:58,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:58,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1008713748, now seen corresponding path program 22 times [2018-10-04 09:23:58,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:58,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:58,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:58,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:58,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:23:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:58,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:23:58,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:23:58,598 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:23:58,615 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:23:58,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:23:58,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:23:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:23:59,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:23:59,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-10-04 09:23:59,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:23:59,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:23:59,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1636, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:23:59,064 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-10-04 09:23:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:23:59,799 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-10-04 09:23:59,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:23:59,800 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-10-04 09:23:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:23:59,800 INFO L225 Difference]: With dead ends: 225 [2018-10-04 09:23:59,800 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 09:23:59,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=916, Invalid=2866, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:23:59,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 09:23:59,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2018-10-04 09:23:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 09:23:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-04 09:23:59,820 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2018-10-04 09:23:59,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:23:59,820 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-04 09:23:59,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:23:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-04 09:23:59,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 09:23:59,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:23:59,820 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-04 09:23:59,821 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:23:59,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:23:59,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483764, now seen corresponding path program 23 times [2018-10-04 09:23:59,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:23:59,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:23:59,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:59,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:23:59,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:23:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:00,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:00,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:00,567 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:24:00,597 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 09:24:00,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:00,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:01,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:01,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-10-04 09:24:01,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:24:01,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:24:01,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2320, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:24:01,272 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 50 states. [2018-10-04 09:24:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:05,352 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2018-10-04 09:24:05,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 09:24:05,359 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2018-10-04 09:24:05,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:05,360 INFO L225 Difference]: With dead ends: 229 [2018-10-04 09:24:05,360 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 09:24:05,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=491, Invalid=5829, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:24:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 09:24:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2018-10-04 09:24:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 09:24:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-04 09:24:05,383 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-10-04 09:24:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:05,384 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-04 09:24:05,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:24:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-04 09:24:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 09:24:05,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:05,385 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-04 09:24:05,385 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:05,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:05,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1446534989, now seen corresponding path program 24 times [2018-10-04 09:24:05,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:05,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:05,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:05,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:05,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:06,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:06,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:06,043 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:24:06,073 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 09:24:06,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:06,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:06,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:06,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-10-04 09:24:06,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:24:06,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:24:06,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1857, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:24:06,584 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 50 states. [2018-10-04 09:24:08,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:08,356 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2018-10-04 09:24:08,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:24:08,357 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2018-10-04 09:24:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:08,358 INFO L225 Difference]: With dead ends: 240 [2018-10-04 09:24:08,358 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 09:24:08,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:24:08,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 09:24:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-10-04 09:24:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 09:24:08,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-04 09:24:08,379 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2018-10-04 09:24:08,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:08,379 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-04 09:24:08,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:24:08,379 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-04 09:24:08,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 09:24:08,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:08,380 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-04 09:24:08,380 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:08,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:08,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2055366085, now seen corresponding path program 25 times [2018-10-04 09:24:08,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:08,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:08,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:08,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:08,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:09,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:09,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:09,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:24:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:09,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:10,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:10,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 52 [2018-10-04 09:24:10,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:24:10,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:24:10,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2618, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:24:10,091 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2018-10-04 09:24:13,085 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2018-10-04 09:24:13,370 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2018-10-04 09:24:14,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:14,445 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2018-10-04 09:24:14,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 09:24:14,446 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2018-10-04 09:24:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:14,447 INFO L225 Difference]: With dead ends: 244 [2018-10-04 09:24:14,448 INFO L226 Difference]: Without dead ends: 182 [2018-10-04 09:24:14,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=539, Invalid=6601, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 09:24:14,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-04 09:24:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2018-10-04 09:24:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 09:24:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-04 09:24:14,471 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2018-10-04 09:24:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:14,471 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-04 09:24:14,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:24:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-04 09:24:14,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 09:24:14,472 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:14,472 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-04 09:24:14,473 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:14,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:14,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1833851874, now seen corresponding path program 26 times [2018-10-04 09:24:14,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:14,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:14,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:14,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:24:14,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:14,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:14,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:14,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:24:15,023 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:24:15,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:15,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:15,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:15,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-10-04 09:24:15,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:24:15,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:24:15,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:24:15,675 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 53 states. [2018-10-04 09:24:16,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:16,795 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2018-10-04 09:24:16,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:24:16,797 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 118 [2018-10-04 09:24:16,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:16,799 INFO L225 Difference]: With dead ends: 255 [2018-10-04 09:24:16,799 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 09:24:16,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1157, Invalid=3673, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:24:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 09:24:16,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2018-10-04 09:24:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-04 09:24:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-04 09:24:16,817 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 118 [2018-10-04 09:24:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:16,817 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-04 09:24:16,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:24:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-04 09:24:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-04 09:24:16,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:16,818 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-04 09:24:16,818 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:16,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:16,818 INFO L82 PathProgramCache]: Analyzing trace with hash 540940634, now seen corresponding path program 27 times [2018-10-04 09:24:16,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:16,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:16,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:16,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:16,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 16 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:17,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:17,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:17,705 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:24:17,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 09:24:17,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:17,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 512 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:19,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:19,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 74 [2018-10-04 09:24:19,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 09:24:19,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 09:24:19,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=4940, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 09:24:19,913 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 75 states. [2018-10-04 09:24:28,598 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2018-10-04 09:24:29,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:29,972 INFO L93 Difference]: Finished difference Result 325 states and 331 transitions. [2018-10-04 09:24:29,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-04 09:24:29,979 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 121 [2018-10-04 09:24:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:29,980 INFO L225 Difference]: With dead ends: 325 [2018-10-04 09:24:29,980 INFO L226 Difference]: Without dead ends: 190 [2018-10-04 09:24:29,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6881 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=2229, Invalid=28923, Unknown=0, NotChecked=0, Total=31152 [2018-10-04 09:24:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-04 09:24:30,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2018-10-04 09:24:30,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 09:24:30,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-10-04 09:24:30,007 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 121 [2018-10-04 09:24:30,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:30,007 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-10-04 09:24:30,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 09:24:30,007 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-10-04 09:24:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 09:24:30,008 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:30,008 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-10-04 09:24:30,008 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:30,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1991581943, now seen corresponding path program 28 times [2018-10-04 09:24:30,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:30,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:30,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:30,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:30,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:31,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:31,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:31,092 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:24:31,115 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:24:31,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:31,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:32,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:32,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-10-04 09:24:32,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:24:32,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:24:32,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:24:32,027 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-10-04 09:24:37,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:37,895 INFO L93 Difference]: Finished difference Result 274 states and 279 transitions. [2018-10-04 09:24:37,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 09:24:37,895 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-10-04 09:24:37,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:37,897 INFO L225 Difference]: With dead ends: 274 [2018-10-04 09:24:37,897 INFO L226 Difference]: Without dead ends: 204 [2018-10-04 09:24:37,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=641, Invalid=8289, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 09:24:37,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-04 09:24:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2018-10-04 09:24:37,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 09:24:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-04 09:24:37,922 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-10-04 09:24:37,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:37,922 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-04 09:24:37,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:24:37,922 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-04 09:24:37,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 09:24:37,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:37,923 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-04 09:24:37,923 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:37,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:37,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1942976080, now seen corresponding path program 29 times [2018-10-04 09:24:37,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:37,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:37,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:37,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:37,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:38,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:38,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:38,864 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:24:38,897 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 09:24:38,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:38,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:39,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:39,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-10-04 09:24:39,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:24:39,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:24:39,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2604, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:24:39,584 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 59 states. [2018-10-04 09:24:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:40,636 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2018-10-04 09:24:40,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:24:40,636 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2018-10-04 09:24:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:40,638 INFO L225 Difference]: With dead ends: 285 [2018-10-04 09:24:40,638 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 09:24:40,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1426, Invalid=4580, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:24:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 09:24:40,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2018-10-04 09:24:40,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 09:24:40,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-04 09:24:40,668 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-10-04 09:24:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:40,668 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-04 09:24:40,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:24:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-04 09:24:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-04 09:24:40,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:40,669 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-04 09:24:40,669 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:40,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:40,670 INFO L82 PathProgramCache]: Analyzing trace with hash 220943656, now seen corresponding path program 30 times [2018-10-04 09:24:40,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:40,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:40,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:40,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:40,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 18 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:42,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:42,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:42,473 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:24:42,509 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 09:24:42,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:24:42,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:24:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 648 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:46,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:24:46,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 82 [2018-10-04 09:24:46,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 09:24:46,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 09:24:46,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=737, Invalid=6069, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 09:24:46,029 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 83 states. [2018-10-04 09:24:55,186 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-10-04 09:24:55,431 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-10-04 09:24:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:24:57,665 INFO L93 Difference]: Finished difference Result 363 states and 369 transitions. [2018-10-04 09:24:57,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-10-04 09:24:57,665 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 135 [2018-10-04 09:24:57,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:24:57,667 INFO L225 Difference]: With dead ends: 363 [2018-10-04 09:24:57,667 INFO L226 Difference]: Without dead ends: 212 [2018-10-04 09:24:57,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8563 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=2679, Invalid=35933, Unknown=0, NotChecked=0, Total=38612 [2018-10-04 09:24:57,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-04 09:24:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 143. [2018-10-04 09:24:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 09:24:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-04 09:24:57,696 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 135 [2018-10-04 09:24:57,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:24:57,696 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-04 09:24:57,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 09:24:57,696 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-04 09:24:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 09:24:57,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:24:57,697 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-10-04 09:24:57,697 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:24:57,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:24:57,697 INFO L82 PathProgramCache]: Analyzing trace with hash 847427031, now seen corresponding path program 31 times [2018-10-04 09:24:57,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:24:57,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:24:57,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:57,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:24:57,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:24:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:24:59,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:24:59,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:24:59,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:24:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:24:59,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:00,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:00,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2018-10-04 09:25:00,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 09:25:00,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 09:25:00,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3990, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:25:00,976 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 65 states. [2018-10-04 09:25:06,120 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-10-04 09:25:06,406 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-10-04 09:25:06,679 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-10-04 09:25:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:08,556 INFO L93 Difference]: Finished difference Result 304 states and 309 transitions. [2018-10-04 09:25:08,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 09:25:08,556 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 142 [2018-10-04 09:25:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:08,558 INFO L225 Difference]: With dead ends: 304 [2018-10-04 09:25:08,558 INFO L226 Difference]: Without dead ends: 226 [2018-10-04 09:25:08,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=751, Invalid=10169, Unknown=0, NotChecked=0, Total=10920 [2018-10-04 09:25:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-04 09:25:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 147. [2018-10-04 09:25:08,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 09:25:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-10-04 09:25:08,588 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 142 [2018-10-04 09:25:08,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:08,588 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-10-04 09:25:08,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 09:25:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-10-04 09:25:08,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 09:25:08,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:08,589 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-04 09:25:08,589 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:08,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:08,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1796978306, now seen corresponding path program 32 times [2018-10-04 09:25:08,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:08,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:08,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:08,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:25:08,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:09,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:09,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:09,555 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:25:09,590 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:25:09,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:09,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:10,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:10,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-10-04 09:25:10,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 09:25:10,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 09:25:10,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=3172, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:25:10,571 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 65 states. [2018-10-04 09:25:11,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:11,907 INFO L93 Difference]: Finished difference Result 315 states and 319 transitions. [2018-10-04 09:25:11,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:25:11,908 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 146 [2018-10-04 09:25:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:11,909 INFO L225 Difference]: With dead ends: 315 [2018-10-04 09:25:11,909 INFO L226 Difference]: Without dead ends: 152 [2018-10-04 09:25:11,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1723, Invalid=5587, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:25:11,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-04 09:25:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2018-10-04 09:25:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-04 09:25:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-04 09:25:11,943 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 146 [2018-10-04 09:25:11,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:11,943 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-04 09:25:11,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 09:25:11,944 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-04 09:25:11,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-04 09:25:11,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:11,945 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-04 09:25:11,945 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:11,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:11,945 INFO L82 PathProgramCache]: Analyzing trace with hash -193355018, now seen corresponding path program 33 times [2018-10-04 09:25:11,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:11,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:11,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:11,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:11,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 20 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:13,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:13,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:13,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:25:13,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 09:25:13,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:13,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 800 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:16,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:16,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 90 [2018-10-04 09:25:16,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 09:25:16,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 09:25:16,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=7314, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 09:25:16,353 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 91 states. [2018-10-04 09:25:27,132 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-10-04 09:25:27,410 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-10-04 09:25:27,688 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-10-04 09:25:27,932 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-04 09:25:30,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:30,441 INFO L93 Difference]: Finished difference Result 401 states and 407 transitions. [2018-10-04 09:25:30,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-10-04 09:25:30,441 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 149 [2018-10-04 09:25:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:30,443 INFO L225 Difference]: With dead ends: 401 [2018-10-04 09:25:30,443 INFO L226 Difference]: Without dead ends: 234 [2018-10-04 09:25:30,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10429 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=3169, Invalid=43703, Unknown=0, NotChecked=0, Total=46872 [2018-10-04 09:25:30,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-04 09:25:30,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 157. [2018-10-04 09:25:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 09:25:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-04 09:25:30,483 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 149 [2018-10-04 09:25:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:30,483 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-04 09:25:30,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 09:25:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-04 09:25:30,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 09:25:30,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:30,484 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-10-04 09:25:30,484 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:30,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:30,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1380130469, now seen corresponding path program 34 times [2018-10-04 09:25:30,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:30,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:30,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:30,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:30,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:32,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:32,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:32,177 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:25:32,206 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:25:32,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:32,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:33,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:33,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 70 [2018-10-04 09:25:33,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 09:25:33,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 09:25:33,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=4784, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:25:33,506 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 71 states. [2018-10-04 09:25:38,675 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-10-04 09:25:38,984 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-10-04 09:25:39,277 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-10-04 09:25:39,476 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-04 09:25:39,661 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-04 09:25:40,022 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2018-10-04 09:25:40,288 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2018-10-04 09:25:41,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:41,736 INFO L93 Difference]: Finished difference Result 334 states and 339 transitions. [2018-10-04 09:25:41,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 09:25:41,737 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 156 [2018-10-04 09:25:41,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:41,739 INFO L225 Difference]: With dead ends: 334 [2018-10-04 09:25:41,740 INFO L226 Difference]: Without dead ends: 248 [2018-10-04 09:25:41,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=869, Invalid=12241, Unknown=0, NotChecked=0, Total=13110 [2018-10-04 09:25:41,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-04 09:25:41,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 161. [2018-10-04 09:25:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 09:25:41,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-10-04 09:25:41,779 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 156 [2018-10-04 09:25:41,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:41,780 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-10-04 09:25:41,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 09:25:41,780 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-10-04 09:25:41,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 09:25:41,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:41,781 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-04 09:25:41,781 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:41,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:41,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1719166132, now seen corresponding path program 35 times [2018-10-04 09:25:41,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:41,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:41,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:41,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:41,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:42,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:42,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:42,596 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:25:42,638 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-04 09:25:42,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:42,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:44,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:44,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-10-04 09:25:44,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 09:25:44,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 09:25:44,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1174, Invalid=3796, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:25:44,744 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 71 states. [2018-10-04 09:25:46,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:25:46,579 INFO L93 Difference]: Finished difference Result 345 states and 349 transitions. [2018-10-04 09:25:46,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:25:46,579 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 160 [2018-10-04 09:25:46,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:25:46,581 INFO L225 Difference]: With dead ends: 345 [2018-10-04 09:25:46,581 INFO L226 Difference]: Without dead ends: 166 [2018-10-04 09:25:46,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2048, Invalid=6694, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:25:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-04 09:25:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2018-10-04 09:25:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-04 09:25:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-10-04 09:25:46,610 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 160 [2018-10-04 09:25:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:25:46,610 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-10-04 09:25:46,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 09:25:46,610 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-10-04 09:25:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-04 09:25:46,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:25:46,611 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-04 09:25:46,611 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:25:46,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:25:46,611 INFO L82 PathProgramCache]: Analyzing trace with hash -148438332, now seen corresponding path program 36 times [2018-10-04 09:25:46,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:25:46,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:25:46,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:46,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:25:46,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:25:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:25:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:48,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:25:48,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:25:48,629 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:25:48,675 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-04 09:25:48,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:25:48,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:25:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:25:50,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:25:50,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 73 [2018-10-04 09:25:50,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:25:50,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:25:50,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=5208, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:25:50,081 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 74 states. [2018-10-04 09:25:56,876 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-10-04 09:25:57,216 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-10-04 09:25:57,539 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-10-04 09:25:57,753 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-04 09:25:57,963 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-04 09:25:58,157 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-04 09:26:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:00,282 INFO L93 Difference]: Finished difference Result 349 states and 354 transitions. [2018-10-04 09:26:00,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 09:26:00,283 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 163 [2018-10-04 09:26:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:00,284 INFO L225 Difference]: With dead ends: 349 [2018-10-04 09:26:00,284 INFO L226 Difference]: Without dead ends: 259 [2018-10-04 09:26:00,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=931, Invalid=13349, Unknown=0, NotChecked=0, Total=14280 [2018-10-04 09:26:00,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-04 09:26:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 168. [2018-10-04 09:26:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-04 09:26:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2018-10-04 09:26:00,316 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2018-10-04 09:26:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:00,317 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2018-10-04 09:26:00,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:26:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2018-10-04 09:26:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-04 09:26:00,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:00,318 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-04 09:26:00,318 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:00,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:00,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1550952469, now seen corresponding path program 37 times [2018-10-04 09:26:00,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:00,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:00,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:00,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:00,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:01,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:01,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:01,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:01,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:02,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:02,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-10-04 09:26:02,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:26:02,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:26:02,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:26:02,621 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 74 states. [2018-10-04 09:26:04,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:04,366 INFO L93 Difference]: Finished difference Result 360 states and 364 transitions. [2018-10-04 09:26:04,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:26:04,366 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 167 [2018-10-04 09:26:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:04,367 INFO L225 Difference]: With dead ends: 360 [2018-10-04 09:26:04,367 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 09:26:04,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2221, Invalid=7285, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:26:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 09:26:04,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2018-10-04 09:26:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 09:26:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-10-04 09:26:04,399 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-10-04 09:26:04,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:04,399 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-10-04 09:26:04,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:26:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-10-04 09:26:04,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 09:26:04,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:04,400 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-04 09:26:04,401 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:04,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:04,401 INFO L82 PathProgramCache]: Analyzing trace with hash -810935949, now seen corresponding path program 38 times [2018-10-04 09:26:04,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:04,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:04,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:04,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:26:04,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:06,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:06,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:06,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:26:06,503 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:26:06,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:06,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:08,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:08,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 76 [2018-10-04 09:26:08,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 09:26:08,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 09:26:08,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=5650, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 09:26:08,089 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 77 states. [2018-10-04 09:26:14,522 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-10-04 09:26:14,881 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-10-04 09:26:15,247 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-10-04 09:26:15,480 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-10-04 09:26:15,693 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-04 09:26:15,930 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-04 09:26:16,183 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-04 09:26:18,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:18,328 INFO L93 Difference]: Finished difference Result 364 states and 369 transitions. [2018-10-04 09:26:18,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 09:26:18,328 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 170 [2018-10-04 09:26:18,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:18,330 INFO L225 Difference]: With dead ends: 364 [2018-10-04 09:26:18,330 INFO L226 Difference]: Without dead ends: 270 [2018-10-04 09:26:18,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=995, Invalid=14505, Unknown=0, NotChecked=0, Total=15500 [2018-10-04 09:26:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-04 09:26:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 175. [2018-10-04 09:26:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 09:26:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-04 09:26:18,363 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-10-04 09:26:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:18,363 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-04 09:26:18,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 09:26:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-04 09:26:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 09:26:18,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:18,364 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-04 09:26:18,364 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:18,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:18,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1036484838, now seen corresponding path program 39 times [2018-10-04 09:26:18,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:18,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:18,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:18,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:18,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:20,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:20,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:20,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:26:20,178 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-04 09:26:20,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:20,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:21,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:21,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-10-04 09:26:21,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 09:26:21,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 09:26:21,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4476, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 09:26:21,608 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 77 states. [2018-10-04 09:26:23,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:23,416 INFO L93 Difference]: Finished difference Result 375 states and 379 transitions. [2018-10-04 09:26:23,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:26:23,417 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 174 [2018-10-04 09:26:23,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:23,418 INFO L225 Difference]: With dead ends: 375 [2018-10-04 09:26:23,418 INFO L226 Difference]: Without dead ends: 180 [2018-10-04 09:26:23,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2401, Invalid=7901, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 09:26:23,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-04 09:26:23,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2018-10-04 09:26:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-04 09:26:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-10-04 09:26:23,451 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 174 [2018-10-04 09:26:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:23,451 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-10-04 09:26:23,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 09:26:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-10-04 09:26:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-04 09:26:23,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:23,452 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-04 09:26:23,452 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:23,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:23,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1003391854, now seen corresponding path program 40 times [2018-10-04 09:26:23,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:23,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:23,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:23,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:23,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:25,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:25,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:25,308 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:26:25,341 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:26:25,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:25,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:27,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:27,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 79 [2018-10-04 09:26:27,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:26:27,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:26:27,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6110, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:26:27,244 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 80 states. [2018-10-04 09:26:34,079 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-10-04 09:26:34,451 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-10-04 09:26:34,807 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-10-04 09:26:35,050 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-10-04 09:26:35,279 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-10-04 09:26:35,504 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-04 09:26:35,716 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-04 09:26:35,924 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-04 09:26:36,556 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2018-10-04 09:26:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:38,198 INFO L93 Difference]: Finished difference Result 379 states and 384 transitions. [2018-10-04 09:26:38,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 09:26:38,198 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 177 [2018-10-04 09:26:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:38,200 INFO L225 Difference]: With dead ends: 379 [2018-10-04 09:26:38,200 INFO L226 Difference]: Without dead ends: 281 [2018-10-04 09:26:38,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1061, Invalid=15709, Unknown=0, NotChecked=0, Total=16770 [2018-10-04 09:26:38,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-04 09:26:38,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2018-10-04 09:26:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-04 09:26:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-10-04 09:26:38,236 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 177 [2018-10-04 09:26:38,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:38,236 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-10-04 09:26:38,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:26:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-10-04 09:26:38,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-04 09:26:38,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:38,237 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-04 09:26:38,238 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:38,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:38,238 INFO L82 PathProgramCache]: Analyzing trace with hash 525284025, now seen corresponding path program 41 times [2018-10-04 09:26:38,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:38,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:38,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:38,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:38,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:39,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:39,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:39,260 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:26:39,305 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-04 09:26:39,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:39,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:40,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:40,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-10-04 09:26:40,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:26:40,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:26:40,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4837, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:26:40,486 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 80 states. [2018-10-04 09:26:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:42,668 INFO L93 Difference]: Finished difference Result 390 states and 394 transitions. [2018-10-04 09:26:42,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:26:42,669 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 181 [2018-10-04 09:26:42,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:42,670 INFO L225 Difference]: With dead ends: 390 [2018-10-04 09:26:42,670 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 09:26:42,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2588, Invalid=8542, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 09:26:42,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 09:26:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2018-10-04 09:26:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 09:26:42,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-04 09:26:42,721 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 181 [2018-10-04 09:26:42,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:42,721 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-04 09:26:42,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:26:42,721 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-04 09:26:42,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-04 09:26:42,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:42,723 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-04 09:26:42,723 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:42,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:42,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1479170495, now seen corresponding path program 42 times [2018-10-04 09:26:42,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:42,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:42,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:42,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:42,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:26:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:44,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:26:44,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:26:44,498 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:26:44,553 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-04 09:26:44,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:26:44,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:26:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:26:46,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:26:46,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 82 [2018-10-04 09:26:46,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 09:26:46,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 09:26:46,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=6588, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 09:26:46,525 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 83 states. [2018-10-04 09:26:54,067 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-10-04 09:26:54,467 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-10-04 09:26:54,856 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-10-04 09:26:55,129 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-10-04 09:26:55,393 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-10-04 09:26:55,638 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-10-04 09:26:55,881 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-04 09:26:56,116 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-04 09:26:56,332 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-04 09:26:56,962 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2018-10-04 09:26:57,184 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2018-10-04 09:26:58,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:26:58,723 INFO L93 Difference]: Finished difference Result 394 states and 399 transitions. [2018-10-04 09:26:58,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 09:26:58,723 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 184 [2018-10-04 09:26:58,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:26:58,725 INFO L225 Difference]: With dead ends: 394 [2018-10-04 09:26:58,725 INFO L226 Difference]: Without dead ends: 292 [2018-10-04 09:26:58,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2813 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1129, Invalid=16961, Unknown=0, NotChecked=0, Total=18090 [2018-10-04 09:26:58,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-04 09:26:58,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 189. [2018-10-04 09:26:58,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-04 09:26:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-10-04 09:26:58,764 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 184 [2018-10-04 09:26:58,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:26:58,764 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-10-04 09:26:58,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 09:26:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-10-04 09:26:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 09:26:58,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:26:58,765 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-04 09:26:58,765 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:26:58,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:26:58,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1293219048, now seen corresponding path program 43 times [2018-10-04 09:26:58,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:26:58,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:26:58,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:58,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:26:58,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:26:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:00,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:00,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:00,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:00,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:27:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:01,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:27:01,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-10-04 09:27:01,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 09:27:01,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 09:27:01,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1594, Invalid=5212, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 09:27:01,930 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 83 states. [2018-10-04 09:27:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:27:04,313 INFO L93 Difference]: Finished difference Result 405 states and 409 transitions. [2018-10-04 09:27:04,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:27:04,313 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 188 [2018-10-04 09:27:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:27:04,315 INFO L225 Difference]: With dead ends: 405 [2018-10-04 09:27:04,315 INFO L226 Difference]: Without dead ends: 194 [2018-10-04 09:27:04,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2782, Invalid=9208, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:27:04,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-04 09:27:04,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2018-10-04 09:27:04,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-04 09:27:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2018-10-04 09:27:04,354 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 188 [2018-10-04 09:27:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:27:04,354 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2018-10-04 09:27:04,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 09:27:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2018-10-04 09:27:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-04 09:27:04,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:27:04,355 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-04 09:27:04,355 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:27:04,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:27:04,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1734936480, now seen corresponding path program 44 times [2018-10-04 09:27:04,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:27:04,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:27:04,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:04,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:27:04,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:27:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:27:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 26 proven. 2432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:27:06,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:27:06,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:06,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:27:06,846 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:27:06,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:27:06,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-10-04 09:27:08,350 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-04 09:27:08,550 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:27:08,551 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:27:08,556 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:27:08,563 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:27:08 BoogieIcfgContainer [2018-10-04 09:27:08,563 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:27:08,564 INFO L168 Benchmark]: Toolchain (without parser) took 247072.46 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -57.7 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 394.5 MB). Peak memory consumption was 336.8 MB. Max. memory is 7.1 GB. [2018-10-04 09:27:08,568 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:27:08,568 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.68 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:27:08,569 INFO L168 Benchmark]: Boogie Preprocessor took 26.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:27:08,569 INFO L168 Benchmark]: RCFGBuilder took 409.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:27:08,570 INFO L168 Benchmark]: TraceAbstraction took 246588.90 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -57.7 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 373.3 MB). Peak memory consumption was 315.7 MB. Max. memory is 7.1 GB. [2018-10-04 09:27:08,575 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.68 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 409.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 246588.90 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -57.7 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 373.3 MB). Peak memory consumption was 315.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 34]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 34). Cancelled while BasicCegarLoop was analyzing trace of length 192 with TraceHistMax 27, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 59 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 246.5s OverallTime, 48 OverallIterations, 27 TraceHistogramMax, 162.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 850 SDtfs, 4007 SDslu, 22923 SDs, 0 SdLazy, 110933 SolverSat, 1555 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7067 GetRequests, 3621 SyntacticMatches, 18 SemanticMatches, 3428 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72304 ImplicationChecksByTransitivity, 154.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=192occurred in iteration=47, 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: 0.8s AutomataMinimizationTime, 47 MinimizatonAttempts, 1377 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 75.1s InterpolantComputationTime, 8814 NumberOfCodeBlocks, 8712 NumberOfCodeBlocksAsserted, 402 NumberOfCheckSat, 8723 ConstructedInterpolants, 0 QuantifiedInterpolants, 8209326 SizeOfPredicates, 140 NumberOfNonLiveVariables, 6387 ConjunctsInSsa, 1892 ConjunctsInUnsatCore, 91 InterpolantComputations, 3 PerfectInterpolantSequences, 22541/74298 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/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-27-08-594.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-27-08-594.csv Completed graceful shutdown