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_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f-m [2018-10-04 14:33:18,903 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 14:33:18,904 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 14:33:18,915 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-04 14:33:18,957 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 14:33:18,972 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 14:33:18,972 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 14:33:18,973 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 14:33:18,973 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 14:33:18,973 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 14:33:18,974 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 14:33:18,974 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 14:33:18,974 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 14:33:18,974 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 14:33:18,974 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 14:33:18,975 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 14:33:18,975 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 14:33:18,975 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 14:33:18,975 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 14:33:18,975 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 14:33:18,975 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 14:33:18,976 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 14:33:18,976 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 14:33:18,976 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 14:33:18,976 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 14:33:18,976 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 14:33:18,977 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 14:33:18,977 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:33:18,977 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 14:33:18,977 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 14:33:18,977 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 14:33:18,978 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 14:33:18,978 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 14:33:18,978 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 14:33:18,978 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 14:33:18,978 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 14:33:19,036 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 14:33:19,050 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 14:33:19,057 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 14:33:19,059 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 14:33:19,060 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 14:33:19,060 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl [2018-10-04 14:33:19,061 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl' [2018-10-04 14:33:19,116 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 14:33:19,118 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 14:33:19,120 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 14:33:19,120 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 14:33:19,120 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 14:33:19,140 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 02:33:19" (1/1) ... [2018-10-04 14:33:19,154 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 02:33:19" (1/1) ... [2018-10-04 14:33:19,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 14:33:19,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 14:33:19,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 14:33:19,163 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 14:33:19,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:19" (1/1) ... [2018-10-04 14:33:19,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:19" (1/1) ... [2018-10-04 14:33:19,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:19" (1/1) ... [2018-10-04 14:33:19,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:19" (1/1) ... [2018-10-04 14:33:19,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:19" (1/1) ... [2018-10-04 14:33:19,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:19" (1/1) ... [2018-10-04 14:33:19,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:19" (1/1) ... [2018-10-04 14:33:19,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 14:33:19,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 14:33:19,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 14:33:19,190 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 14:33:19,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:33:19,263 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-04 14:33:19,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 14:33:19,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 14:33:19,513 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 14:33:19,514 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:33:19 BoogieIcfgContainer [2018-10-04 14:33:19,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 14:33:19,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 14:33:19,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 14:33:19,518 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 14:33:19,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:33:19" (1/2) ... [2018-10-04 14:33:19,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65bd7c90 and model type ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 02:33:19, skipping insertion in model container [2018-10-04 14:33:19,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:33:19" (2/2) ... [2018-10-04 14:33:19,521 INFO L112 eAbstractionObserver]: Analyzing ICFG ArrayInit02.bpl [2018-10-04 14:33:19,535 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 14:33:19,545 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 14:33:19,603 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 14:33:19,604 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 14:33:19,604 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 14:33:19,604 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 14:33:19,604 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 14:33:19,605 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 14:33:19,605 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 14:33:19,605 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 14:33:19,605 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 14:33:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-04 14:33:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 14:33:19,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:19,632 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 14:33:19,634 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:19,643 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:19,644 INFO L82 PathProgramCache]: Analyzing trace with hash 900035954, now seen corresponding path program 1 times [2018-10-04 14:33:19,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:19,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:19,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:19,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:19,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:19,901 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 14:33:19,903 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:33:19,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 14:33:19,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:33:19,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:33:19,919 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:19,922 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2018-10-04 14:33:20,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:20,076 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-10-04 14:33:20,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:33:20,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 14:33:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:20,094 INFO L225 Difference]: With dead ends: 26 [2018-10-04 14:33:20,095 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 14:33:20,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 3 [2018-10-04 14:33:20,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 14:33:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-10-04 14:33:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 14:33:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2018-10-04 14:33:20,132 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2018-10-04 14:33:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:20,133 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2018-10-04 14:33:20,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:33:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2018-10-04 14:33:20,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 14:33:20,134 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:20,134 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 14:33:20,134 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:20,134 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:20,135 INFO L82 PathProgramCache]: Analyzing trace with hash 429804648, now seen corresponding path program 1 times [2018-10-04 14:33:20,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:20,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:20,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:20,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:20,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:20,208 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 14:33:20,209 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:33:20,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-04 14:33:20,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:33:20,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:33:20,211 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:20,211 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2018-10-04 14:33:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:20,336 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-10-04 14:33:20,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:33:20,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-04 14:33:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:20,338 INFO L225 Difference]: With dead ends: 25 [2018-10-04 14:33:20,338 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 14:33:20,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-04 14:33:20,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 14:33:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-04 14:33:20,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 14:33:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2018-10-04 14:33:20,344 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2018-10-04 14:33:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:20,345 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2018-10-04 14:33:20,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:33:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2018-10-04 14:33:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 14:33:20,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:20,346 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 14:33:20,347 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:20,347 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:20,347 INFO L82 PathProgramCache]: Analyzing trace with hash 429806570, now seen corresponding path program 1 times [2018-10-04 14:33:20,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:20,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:20,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:20,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:20,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:20,396 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 14:33:20,396 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:33:20,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 14:33:20,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 14:33:20,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 14:33:20,397 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:20,397 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 3 states. [2018-10-04 14:33:20,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:20,429 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2018-10-04 14:33:20,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 14:33:20,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-04 14:33:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:20,431 INFO L225 Difference]: With dead ends: 24 [2018-10-04 14:33:20,431 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 14:33:20,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 14:33:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 14:33:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-10-04 14:33:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 14:33:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-04 14:33:20,435 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-04 14:33:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:20,436 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-04 14:33:20,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 14:33:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-04 14:33:20,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 14:33:20,437 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:20,437 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 14:33:20,437 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:20,438 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:20,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2090155286, now seen corresponding path program 1 times [2018-10-04 14:33:20,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:20,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:20,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:20,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:20,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:20,669 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 14:33:20,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:20,670 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 14:33:20,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:20,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:20,893 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 14:33:20,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:20,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-04 14:33:20,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 14:33:20,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 14:33:20,915 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:20,915 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2018-10-04 14:33:21,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:21,220 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-10-04 14:33:21,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 14:33:21,221 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2018-10-04 14:33:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:21,222 INFO L225 Difference]: With dead ends: 26 [2018-10-04 14:33:21,222 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 14:33:21,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 5 [2018-10-04 14:33:21,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 14:33:21,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-10-04 14:33:21,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 14:33:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-04 14:33:21,226 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-10-04 14:33:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:21,226 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-04 14:33:21,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 14:33:21,227 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-04 14:33:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 14:33:21,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:21,228 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 14:33:21,228 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:21,228 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:21,229 INFO L82 PathProgramCache]: Analyzing trace with hash -368470767, now seen corresponding path program 1 times [2018-10-04 14:33:21,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:21,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:21,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:21,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:21,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:21,324 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 14:33:21,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:21,325 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 14:33:21,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:21,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:21,545 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 14:33:21,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:21,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-04 14:33:21,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:33:21,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:33:21,567 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:21,567 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2018-10-04 14:33:21,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:21,684 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-04 14:33:21,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:33:21,685 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 14:33:21,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:21,685 INFO L225 Difference]: With dead ends: 31 [2018-10-04 14:33:21,686 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 14:33:21,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 6 [2018-10-04 14:33:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 14:33:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-10-04 14:33:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 14:33:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-10-04 14:33:21,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-10-04 14:33:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:21,690 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-10-04 14:33:21,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:33:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-10-04 14:33:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 14:33:21,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:21,691 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 14:33:21,692 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:21,692 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:21,692 INFO L82 PathProgramCache]: Analyzing trace with hash -256855911, now seen corresponding path program 2 times [2018-10-04 14:33:21,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:21,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:21,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:21,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:21,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:21,831 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 14:33:21,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:21,832 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 14:33:21,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:33:21,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:33:21,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:21,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:22,533 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 14:33:22,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:22,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-10-04 14:33:22,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 14:33:22,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 14:33:22,562 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:22,562 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 15 states. [2018-10-04 14:33:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:23,204 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-10-04 14:33:23,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:33:23,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2018-10-04 14:33:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:23,206 INFO L225 Difference]: With dead ends: 43 [2018-10-04 14:33:23,207 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 14:33:23,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 13 [2018-10-04 14:33:23,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 14:33:23,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-10-04 14:33:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 14:33:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-04 14:33:23,212 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2018-10-04 14:33:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:23,213 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-04 14:33:23,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 14:33:23,213 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-04 14:33:23,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 14:33:23,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:23,214 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 14:33:23,214 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:23,215 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:23,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1324912968, now seen corresponding path program 3 times [2018-10-04 14:33:23,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:23,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:23,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:23,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:23,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:23,462 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 14:33:23,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:23,463 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 14:33:23,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:33:23,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 14:33:23,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:23,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:23,612 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 14:33:23,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:23,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-10-04 14:33:23,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:33:23,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:33:23,637 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:23,637 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2018-10-04 14:33:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:23,983 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-10-04 14:33:23,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:33:23,989 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2018-10-04 14:33:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:23,990 INFO L225 Difference]: With dead ends: 49 [2018-10-04 14:33:23,990 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 14:33:23,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 8 [2018-10-04 14:33:23,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 14:33:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-04 14:33:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 14:33:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-04 14:33:23,998 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-10-04 14:33:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:23,998 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-04 14:33:23,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:33:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-04 14:33:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 14:33:23,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:23,999 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 14:33:24,000 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:24,000 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:24,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1588570591, now seen corresponding path program 4 times [2018-10-04 14:33:24,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:24,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:24,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:24,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:24,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:24,110 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 14:33:24,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:24,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:33:24,121 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:33:24,130 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:33:24,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:24,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:24,351 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 14:33:24,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:24,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-04 14:33:24,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:33:24,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:33:24,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:24,373 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-04 14:33:24,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:24,693 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-10-04 14:33:24,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:33:24,694 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-04 14:33:24,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:24,695 INFO L225 Difference]: With dead ends: 60 [2018-10-04 14:33:24,695 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 14:33:24,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 7 [2018-10-04 14:33:24,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 14:33:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-10-04 14:33:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 14:33:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-04 14:33:24,701 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-10-04 14:33:24,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:24,702 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-04 14:33:24,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:33:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-04 14:33:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 14:33:24,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:24,703 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 14:33:24,703 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:24,704 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:24,704 INFO L82 PathProgramCache]: Analyzing trace with hash 366737255, now seen corresponding path program 5 times [2018-10-04 14:33:24,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:24,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:24,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:24,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:24,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:25,092 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 14:33:25,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:25,092 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 14:33:25,101 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:33:25,113 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-04 14:33:25,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:25,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:25,716 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 14:33:25,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:25,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-10-04 14:33:25,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:33:25,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:33:25,737 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:25,737 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 17 states. [2018-10-04 14:33:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:26,288 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-10-04 14:33:26,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:33:26,289 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-10-04 14:33:26,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:26,290 INFO L225 Difference]: With dead ends: 64 [2018-10-04 14:33:26,290 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 14:33:26,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.4s impTime 10 [2018-10-04 14:33:26,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 14:33:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2018-10-04 14:33:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 14:33:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-04 14:33:26,298 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-10-04 14:33:26,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:26,298 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-04 14:33:26,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:33:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-04 14:33:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 14:33:26,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:26,300 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-04 14:33:26,300 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:26,300 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:26,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1079885042, now seen corresponding path program 6 times [2018-10-04 14:33:26,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:26,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:26,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:26,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:26,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:26,428 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 14:33:26,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:26,429 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 14:33:26,444 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:33:26,465 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 14:33:26,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:26,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:26,736 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 14:33:26,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:26,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-04 14:33:26,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:33:26,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:33:26,761 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:26,761 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2018-10-04 14:33:26,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:26,990 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-10-04 14:33:26,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 14:33:26,990 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2018-10-04 14:33:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:26,992 INFO L225 Difference]: With dead ends: 75 [2018-10-04 14:33:26,992 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 14:33:26,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 8 [2018-10-04 14:33:26,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 14:33:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-10-04 14:33:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 14:33:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-04 14:33:27,000 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2018-10-04 14:33:27,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:27,000 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-04 14:33:27,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:33:27,001 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-04 14:33:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 14:33:27,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:27,002 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-04 14:33:27,002 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:27,002 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:27,003 INFO L82 PathProgramCache]: Analyzing trace with hash -921359226, now seen corresponding path program 7 times [2018-10-04 14:33:27,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:27,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:27,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:27,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:27,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:27,256 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 14:33:27,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:27,257 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 14:33:27,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:27,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:27,619 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 14:33:27,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:27,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-10-04 14:33:27,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:33:27,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:33:27,640 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:27,641 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-10-04 14:33:28,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:28,335 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-10-04 14:33:28,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 14:33:28,336 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-10-04 14:33:28,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:28,337 INFO L225 Difference]: With dead ends: 79 [2018-10-04 14:33:28,337 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 14:33:28,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 14 [2018-10-04 14:33:28,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 14:33:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2018-10-04 14:33:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 14:33:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-04 14:33:28,345 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-10-04 14:33:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:28,345 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-04 14:33:28,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:33:28,346 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-04 14:33:28,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 14:33:28,347 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:28,347 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-04 14:33:28,347 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:28,347 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:28,348 INFO L82 PathProgramCache]: Analyzing trace with hash 451793069, now seen corresponding path program 8 times [2018-10-04 14:33:28,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:28,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:28,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:28,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:28,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:28,586 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 14:33:28,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:28,587 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 14:33:28,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:33:28,620 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:33:28,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:28,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:29,002 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 14:33:29,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:29,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-04 14:33:29,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:33:29,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:33:29,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:29,025 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2018-10-04 14:33:29,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:29,267 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-10-04 14:33:29,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:33:29,267 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-10-04 14:33:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:29,268 INFO L225 Difference]: With dead ends: 90 [2018-10-04 14:33:29,269 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 14:33:29,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 9 [2018-10-04 14:33:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 14:33:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-10-04 14:33:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 14:33:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-04 14:33:29,276 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2018-10-04 14:33:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:29,277 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-04 14:33:29,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:33:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-04 14:33:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 14:33:29,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:29,278 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-04 14:33:29,278 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:29,278 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:29,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1868574667, now seen corresponding path program 9 times [2018-10-04 14:33:29,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:29,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:29,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:29,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:29,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:29,757 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 14:33:29,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:29,757 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 14:33:29,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:33:29,783 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 14:33:29,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:29,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:30,119 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 14:33:30,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:30,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2018-10-04 14:33:30,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 14:33:30,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 14:33:30,141 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:30,141 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 31 states. [2018-10-04 14:33:32,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:32,146 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-10-04 14:33:32,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 14:33:32,147 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-10-04 14:33:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:32,148 INFO L225 Difference]: With dead ends: 116 [2018-10-04 14:33:32,149 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 14:33:32,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime 20 [2018-10-04 14:33:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 14:33:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-10-04 14:33:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 14:33:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-04 14:33:32,158 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2018-10-04 14:33:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:32,158 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-04 14:33:32,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 14:33:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-04 14:33:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 14:33:32,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:32,159 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-04 14:33:32,160 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:32,160 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:32,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2089942100, now seen corresponding path program 10 times [2018-10-04 14:33:32,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:32,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:32,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:32,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:32,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:32,433 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 14:33:32,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:32,434 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 14:33:32,442 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:33:32,454 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:33:32,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:32,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:32,845 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 14:33:32,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:32,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2018-10-04 14:33:32,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:33:32,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:33:32,867 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:32,867 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-04 14:33:34,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:34,233 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-10-04 14:33:34,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 14:33:34,234 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-04 14:33:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:34,235 INFO L225 Difference]: With dead ends: 109 [2018-10-04 14:33:34,236 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 14:33:34,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 16 [2018-10-04 14:33:34,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 14:33:34,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-10-04 14:33:34,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 14:33:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-04 14:33:34,245 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2018-10-04 14:33:34,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:34,245 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-04 14:33:34,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:33:34,245 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-04 14:33:34,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 14:33:34,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:34,246 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-04 14:33:34,247 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:34,247 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:34,247 INFO L82 PathProgramCache]: Analyzing trace with hash 549587323, now seen corresponding path program 11 times [2018-10-04 14:33:34,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:34,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:34,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:34,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:34,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:34,605 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 14:33:34,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:34,605 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 14:33:34,614 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:33:34,628 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 14:33:34,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:34,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:34,907 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 14:33:34,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:34,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-10-04 14:33:34,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:33:34,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:33:34,928 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:34,929 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2018-10-04 14:33:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:35,327 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2018-10-04 14:33:35,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:33:35,327 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-10-04 14:33:35,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:35,328 INFO L225 Difference]: With dead ends: 120 [2018-10-04 14:33:35,329 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 14:33:35,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 11 [2018-10-04 14:33:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 14:33:35,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-10-04 14:33:35,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 14:33:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-04 14:33:35,338 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2018-10-04 14:33:35,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:35,339 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-04 14:33:35,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:33:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-04 14:33:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 14:33:35,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:35,340 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-04 14:33:35,340 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:35,340 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:35,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1743111421, now seen corresponding path program 12 times [2018-10-04 14:33:35,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:35,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:35,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:35,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:35,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:35,735 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 14:33:35,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:35,736 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 14:33:35,752 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:33:35,772 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 14:33:35,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:35,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:36,129 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 14:33:36,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:36,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-10-04 14:33:36,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 14:33:36,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 14:33:36,150 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:36,150 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 29 states. [2018-10-04 14:33:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:37,749 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2018-10-04 14:33:37,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 14:33:37,751 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2018-10-04 14:33:37,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:37,752 INFO L225 Difference]: With dead ends: 124 [2018-10-04 14:33:37,752 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 14:33:37,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 18 [2018-10-04 14:33:37,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 14:33:37,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2018-10-04 14:33:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 14:33:37,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-10-04 14:33:37,765 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2018-10-04 14:33:37,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:37,765 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-10-04 14:33:37,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 14:33:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-10-04 14:33:37,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 14:33:37,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:37,766 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-04 14:33:37,767 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:37,767 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:37,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1415751510, now seen corresponding path program 13 times [2018-10-04 14:33:37,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:37,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:37,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:37,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:37,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:38,016 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 14:33:38,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:38,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:33:38,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:38,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:38,285 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 14:33:38,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:38,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-04 14:33:38,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 14:33:38,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 14:33:38,306 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:38,306 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 29 states. [2018-10-04 14:33:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:38,831 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-10-04 14:33:38,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:33:38,837 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2018-10-04 14:33:38,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:38,838 INFO L225 Difference]: With dead ends: 135 [2018-10-04 14:33:38,838 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 14:33:38,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 12 [2018-10-04 14:33:38,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 14:33:38,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-10-04 14:33:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 14:33:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-04 14:33:38,849 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-10-04 14:33:38,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:38,849 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-04 14:33:38,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 14:33:38,849 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-04 14:33:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 14:33:38,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:38,850 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-04 14:33:38,851 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:38,851 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:38,851 INFO L82 PathProgramCache]: Analyzing trace with hash 175889954, now seen corresponding path program 14 times [2018-10-04 14:33:38,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:38,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:38,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:38,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:38,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:39,579 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 14:33:39,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:39,579 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 14:33:39,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:33:39,613 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:33:39,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:39,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:40,179 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 14:33:40,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:40,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2018-10-04 14:33:40,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 14:33:40,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 14:33:40,200 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:40,200 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 43 states. [2018-10-04 14:33:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:42,848 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-10-04 14:33:42,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 14:33:42,848 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2018-10-04 14:33:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:42,849 INFO L225 Difference]: With dead ends: 173 [2018-10-04 14:33:42,849 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 14:33:42,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime 29 [2018-10-04 14:33:42,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 14:33:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2018-10-04 14:33:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 14:33:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-04 14:33:42,861 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2018-10-04 14:33:42,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:42,861 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-04 14:33:42,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 14:33:42,862 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-04 14:33:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 14:33:42,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:42,863 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-04 14:33:42,863 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:42,863 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:42,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2036938705, now seen corresponding path program 15 times [2018-10-04 14:33:42,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:42,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:42,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:42,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:42,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:43,440 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 14:33:43,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:43,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:33:43,449 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:33:43,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 14:33:43,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:43,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:44,065 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 14:33:44,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:44,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2018-10-04 14:33:44,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 14:33:44,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 14:33:44,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:44,087 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 47 states. [2018-10-04 14:33:46,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:46,917 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-10-04 14:33:46,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 14:33:46,918 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2018-10-04 14:33:46,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:46,919 INFO L225 Difference]: With dead ends: 192 [2018-10-04 14:33:46,919 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 14:33:46,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.1s impTime 31 [2018-10-04 14:33:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 14:33:46,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2018-10-04 14:33:46,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 14:33:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-04 14:33:46,929 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2018-10-04 14:33:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:46,930 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-04 14:33:46,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 14:33:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-04 14:33:46,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 14:33:46,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:46,931 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-04 14:33:46,931 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:46,931 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:46,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1070649840, now seen corresponding path program 16 times [2018-10-04 14:33:46,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:46,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:46,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:46,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:46,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:48,256 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 14:33:48,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:48,256 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 14:33:48,264 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:33:48,280 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:33:48,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:48,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:48,642 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 14:33:48,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:48,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-10-04 14:33:48,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:33:48,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:33:48,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:48,663 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2018-10-04 14:33:51,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:51,833 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2018-10-04 14:33:51,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 14:33:51,833 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2018-10-04 14:33:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:51,835 INFO L225 Difference]: With dead ends: 169 [2018-10-04 14:33:51,835 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 14:33:51,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime 25 [2018-10-04 14:33:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 14:33:51,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2018-10-04 14:33:51,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 14:33:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-04 14:33:51,847 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2018-10-04 14:33:51,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:51,847 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-04 14:33:51,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:33:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-04 14:33:51,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 14:33:51,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:51,848 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-04 14:33:51,848 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:51,849 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:51,849 INFO L82 PathProgramCache]: Analyzing trace with hash -685461225, now seen corresponding path program 17 times [2018-10-04 14:33:51,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:51,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:51,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:51,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:51,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:52,115 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 14:33:52,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:52,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:33:52,123 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:33:52,146 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 14:33:52,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:52,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:52,453 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 14:33:52,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:52,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-10-04 14:33:52,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:33:52,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:33:52,474 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:52,474 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 38 states. [2018-10-04 14:33:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:53,137 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2018-10-04 14:33:53,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 14:33:53,138 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2018-10-04 14:33:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:53,138 INFO L225 Difference]: With dead ends: 180 [2018-10-04 14:33:53,139 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 14:33:53,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 15 [2018-10-04 14:33:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 14:33:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-10-04 14:33:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 14:33:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-10-04 14:33:53,151 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2018-10-04 14:33:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:53,151 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-10-04 14:33:53,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:33:53,151 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-10-04 14:33:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 14:33:53,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:53,152 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-04 14:33:53,152 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:53,152 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:53,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1750415713, now seen corresponding path program 18 times [2018-10-04 14:33:53,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:53,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:53,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:53,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:53,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:53,997 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 14:33:53,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:53,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:33:54,004 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:33:54,026 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 14:33:54,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:33:54,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:54,450 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 14:33:54,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:54,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-10-04 14:33:54,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 14:33:54,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 14:33:54,471 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:54,471 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 41 states. [2018-10-04 14:33:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:57,817 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2018-10-04 14:33:57,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 14:33:57,822 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2018-10-04 14:33:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:57,823 INFO L225 Difference]: With dead ends: 184 [2018-10-04 14:33:57,823 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 14:33:57,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.4s impTime 26 [2018-10-04 14:33:57,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 14:33:57,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2018-10-04 14:33:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 14:33:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-04 14:33:57,837 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-10-04 14:33:57,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:57,837 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-04 14:33:57,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 14:33:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-04 14:33:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 14:33:57,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:57,838 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-04 14:33:57,839 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:57,839 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:57,839 INFO L82 PathProgramCache]: Analyzing trace with hash 310818374, now seen corresponding path program 19 times [2018-10-04 14:33:57,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:57,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:57,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:57,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:33:57,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:58,482 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 14:33:58,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:33:58,482 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 14:33:58,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:33:58,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:33:58,835 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 14:33:58,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:33:58,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-04 14:33:58,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 14:33:58,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 14:33:58,856 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:33:58,856 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2018-10-04 14:33:59,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:33:59,450 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-10-04 14:33:59,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 14:33:59,451 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2018-10-04 14:33:59,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:33:59,452 INFO L225 Difference]: With dead ends: 195 [2018-10-04 14:33:59,452 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 14:33:59,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 16 [2018-10-04 14:33:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 14:33:59,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2018-10-04 14:33:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 14:33:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-04 14:33:59,465 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2018-10-04 14:33:59,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:33:59,465 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-04 14:33:59,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 14:33:59,465 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-04 14:33:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 14:33:59,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:33:59,466 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-04 14:33:59,466 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:33:59,467 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:33:59,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2005850046, now seen corresponding path program 20 times [2018-10-04 14:33:59,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:33:59,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:33:59,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:59,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:33:59,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:33:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:00,837 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 14:34:00,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:00,837 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 14:34:00,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:00,866 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:00,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:00,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:01,758 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 14:34:01,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:01,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 58 [2018-10-04 14:34:01,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 14:34:01,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 14:34:01,779 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:01,779 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 59 states. [2018-10-04 14:34:06,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:06,578 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2018-10-04 14:34:06,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 14:34:06,578 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 93 [2018-10-04 14:34:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:06,580 INFO L225 Difference]: With dead ends: 249 [2018-10-04 14:34:06,580 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 14:34:06,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s Time 4.2s impTime 40 [2018-10-04 14:34:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 14:34:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2018-10-04 14:34:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 14:34:06,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-04 14:34:06,596 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2018-10-04 14:34:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:06,596 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-04 14:34:06,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 14:34:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-04 14:34:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 14:34:06,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:06,598 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-10-04 14:34:06,598 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:06,598 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:06,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1811736429, now seen corresponding path program 21 times [2018-10-04 14:34:06,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:06,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:06,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:06,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:06,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:07,349 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 14:34:07,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:07,349 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 14:34:07,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:07,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 14:34:07,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:07,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:08,087 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 14:34:08,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:08,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-10-04 14:34:08,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 14:34:08,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 14:34:08,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:08,109 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 47 states. [2018-10-04 14:34:12,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:12,014 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2018-10-04 14:34:12,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 14:34:12,015 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2018-10-04 14:34:12,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:12,016 INFO L225 Difference]: With dead ends: 214 [2018-10-04 14:34:12,016 INFO L226 Difference]: Without dead ends: 160 [2018-10-04 14:34:12,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.1s impTime 30 [2018-10-04 14:34:12,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-04 14:34:12,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2018-10-04 14:34:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 14:34:12,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-04 14:34:12,034 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2018-10-04 14:34:12,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:12,034 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-04 14:34:12,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 14:34:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-04 14:34:12,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 14:34:12,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:12,035 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-04 14:34:12,035 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:12,035 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:12,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1008713748, now seen corresponding path program 22 times [2018-10-04 14:34:12,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:12,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:12,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:12,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:12,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:12,440 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 14:34:12,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:12,440 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 14:34:12,452 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:12,471 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:12,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:12,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:12,868 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 14:34:12,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:12,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-10-04 14:34:12,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 14:34:12,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 14:34:12,889 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:12,889 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-10-04 14:34:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:13,857 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-10-04 14:34:13,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 14:34:13,857 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-10-04 14:34:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:13,858 INFO L225 Difference]: With dead ends: 225 [2018-10-04 14:34:13,858 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 14:34:13,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 18 [2018-10-04 14:34:13,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 14:34:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2018-10-04 14:34:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 14:34:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-04 14:34:13,874 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2018-10-04 14:34:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:13,874 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-04 14:34:13,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 14:34:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-04 14:34:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 14:34:13,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:13,875 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-04 14:34:13,875 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:13,875 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:13,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483764, now seen corresponding path program 23 times [2018-10-04 14:34:13,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:13,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:13,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:13,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:13,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:14,674 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 14:34:14,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:14,674 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 14:34:14,689 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:14,715 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 14:34:14,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:14,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:15,300 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 14:34:15,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:15,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-10-04 14:34:15,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 14:34:15,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 14:34:15,321 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:15,321 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 50 states. [2018-10-04 14:34:19,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:19,084 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2018-10-04 14:34:19,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 14:34:19,085 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2018-10-04 14:34:19,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:19,086 INFO L225 Difference]: With dead ends: 229 [2018-10-04 14:34:19,086 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 14:34:19,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.2s impTime 32 [2018-10-04 14:34:19,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 14:34:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2018-10-04 14:34:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 14:34:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-04 14:34:19,103 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-10-04 14:34:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:19,103 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-04 14:34:19,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 14:34:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-04 14:34:19,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 14:34:19,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:19,104 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-04 14:34:19,104 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:19,104 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:19,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1446534989, now seen corresponding path program 24 times [2018-10-04 14:34:19,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:19,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:19,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:19,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:19,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:19,658 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 14:34:19,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:19,658 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 14:34:19,666 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:19,696 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 14:34:19,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:19,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:20,107 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 14:34:20,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:20,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-10-04 14:34:20,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 14:34:20,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 14:34:20,129 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:20,129 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 50 states. [2018-10-04 14:34:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:21,849 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2018-10-04 14:34:21,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 14:34:21,849 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2018-10-04 14:34:21,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:21,850 INFO L225 Difference]: With dead ends: 240 [2018-10-04 14:34:21,850 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 14:34:21,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 19 [2018-10-04 14:34:21,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 14:34:21,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-10-04 14:34:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 14:34:21,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-04 14:34:21,867 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2018-10-04 14:34:21,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:21,867 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-04 14:34:21,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 14:34:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-04 14:34:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 14:34:21,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:21,868 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-04 14:34:21,868 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:21,868 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:21,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2055366085, now seen corresponding path program 25 times [2018-10-04 14:34:21,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:21,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:21,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:21,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:21,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:22,861 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 14:34:22,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:22,861 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 14:34:22,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:22,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:23,686 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 14:34:23,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:23,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 52 [2018-10-04 14:34:23,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 14:34:23,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 14:34:23,709 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:23,709 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2018-10-04 14:34:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:28,044 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2018-10-04 14:34:28,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 14:34:28,044 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2018-10-04 14:34:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:28,046 INFO L225 Difference]: With dead ends: 244 [2018-10-04 14:34:28,046 INFO L226 Difference]: Without dead ends: 182 [2018-10-04 14:34:28,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.7s impTime 34 [2018-10-04 14:34:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-04 14:34:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2018-10-04 14:34:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 14:34:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-04 14:34:28,067 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2018-10-04 14:34:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:28,067 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-04 14:34:28,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 14:34:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-04 14:34:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 14:34:28,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:28,068 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-04 14:34:28,068 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:28,068 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:28,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1833851874, now seen corresponding path program 26 times [2018-10-04 14:34:28,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:28,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:28,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:28,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:28,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:28,518 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 14:34:28,519 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:28,519 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 14:34:28,528 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:28,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:28,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:28,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:29,142 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 14:34:29,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:29,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-10-04 14:34:29,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 14:34:29,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 14:34:29,164 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:29,165 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 53 states. [2018-10-04 14:34:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:30,225 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2018-10-04 14:34:30,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 14:34:30,225 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 118 [2018-10-04 14:34:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:30,226 INFO L225 Difference]: With dead ends: 255 [2018-10-04 14:34:30,226 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 14:34:30,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 20 [2018-10-04 14:34:30,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 14:34:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2018-10-04 14:34:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-04 14:34:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-04 14:34:30,245 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 118 [2018-10-04 14:34:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:30,245 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-04 14:34:30,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 14:34:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-04 14:34:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-04 14:34:30,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:30,246 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-04 14:34:30,246 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:30,246 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:30,247 INFO L82 PathProgramCache]: Analyzing trace with hash 540940634, now seen corresponding path program 27 times [2018-10-04 14:34:30,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:30,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:30,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:30,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:30,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:31,634 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 14:34:31,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:31,635 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 14:34:31,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:34:31,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 14:34:31,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:31,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:33,010 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 14:34:33,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:33,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 74 [2018-10-04 14:34:33,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 14:34:33,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 14:34:33,031 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:33,032 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 75 states. [2018-10-04 14:34:39,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:39,290 INFO L93 Difference]: Finished difference Result 325 states and 331 transitions. [2018-10-04 14:34:39,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-04 14:34:39,291 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 121 [2018-10-04 14:34:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:39,293 INFO L225 Difference]: With dead ends: 325 [2018-10-04 14:34:39,293 INFO L226 Difference]: Without dead ends: 190 [2018-10-04 14:34:39,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s Time 5.2s impTime 53 [2018-10-04 14:34:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-04 14:34:39,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2018-10-04 14:34:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 14:34:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-10-04 14:34:39,321 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 121 [2018-10-04 14:34:39,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:39,321 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-10-04 14:34:39,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 14:34:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-10-04 14:34:39,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 14:34:39,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:39,322 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-10-04 14:34:39,323 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:39,323 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:39,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1991581943, now seen corresponding path program 28 times [2018-10-04 14:34:39,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:39,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:39,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:39,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:39,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:40,475 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 14:34:40,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:40,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:34:40,484 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:34:40,507 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:34:40,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:40,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:41,283 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 14:34:41,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:41,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-10-04 14:34:41,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 14:34:41,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 14:34:41,305 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:41,305 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-10-04 14:34:47,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:47,541 INFO L93 Difference]: Finished difference Result 274 states and 279 transitions. [2018-10-04 14:34:47,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 14:34:47,541 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-10-04 14:34:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:47,543 INFO L225 Difference]: With dead ends: 274 [2018-10-04 14:34:47,543 INFO L226 Difference]: Without dead ends: 204 [2018-10-04 14:34:47,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s Time 3.6s impTime 38 [2018-10-04 14:34:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-04 14:34:47,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2018-10-04 14:34:47,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 14:34:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-04 14:34:47,574 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-10-04 14:34:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:47,575 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-04 14:34:47,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 14:34:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-04 14:34:47,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 14:34:47,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:47,576 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-04 14:34:47,576 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:47,576 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:47,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1942976080, now seen corresponding path program 29 times [2018-10-04 14:34:47,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:47,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:47,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:47,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:47,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:48,811 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 14:34:48,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:48,812 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 14:34:48,819 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:48,851 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 14:34:48,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:48,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:49,764 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 14:34:49,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:49,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-10-04 14:34:49,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 14:34:49,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 14:34:49,785 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:49,785 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 59 states. [2018-10-04 14:34:50,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:50,904 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2018-10-04 14:34:50,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 14:34:50,905 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2018-10-04 14:34:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:50,907 INFO L225 Difference]: With dead ends: 285 [2018-10-04 14:34:50,907 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 14:34:50,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.7s impTime 22 [2018-10-04 14:34:50,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 14:34:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2018-10-04 14:34:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 14:34:50,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-04 14:34:50,934 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-10-04 14:34:50,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:50,934 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-04 14:34:50,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 14:34:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-04 14:34:50,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-04 14:34:50,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:50,935 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-04 14:34:50,935 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:50,935 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:50,935 INFO L82 PathProgramCache]: Analyzing trace with hash 220943656, now seen corresponding path program 30 times [2018-10-04 14:34:50,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:50,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:50,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:50,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:50,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:52,221 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 14:34:52,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:52,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:34:52,229 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:52,265 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 14:34:52,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:52,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:53,899 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 14:34:53,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:53,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 82 [2018-10-04 14:34:53,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 14:34:53,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 14:34:53,922 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:53,922 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 83 states. [2018-10-04 14:35:02,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:02,282 INFO L93 Difference]: Finished difference Result 363 states and 369 transitions. [2018-10-04 14:35:02,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-10-04 14:35:02,283 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 135 [2018-10-04 14:35:02,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:02,284 INFO L225 Difference]: With dead ends: 363 [2018-10-04 14:35:02,285 INFO L226 Difference]: Without dead ends: 212 [2018-10-04 14:35:02,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7s Time 6.8s impTime 58 [2018-10-04 14:35:02,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-04 14:35:02,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 143. [2018-10-04 14:35:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 14:35:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-04 14:35:02,309 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 135 [2018-10-04 14:35:02,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:02,310 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-04 14:35:02,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 14:35:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-04 14:35:02,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 14:35:02,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:02,311 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-10-04 14:35:02,311 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:02,311 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash 847427031, now seen corresponding path program 31 times [2018-10-04 14:35:02,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:02,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:02,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:02,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:02,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:04,484 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 14:35:04,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:04,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:35:04,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:04,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:05,570 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 14:35:05,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:05,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2018-10-04 14:35:05,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 14:35:05,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 14:35:05,593 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:05,593 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 65 states. [2018-10-04 14:35:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:11,931 INFO L93 Difference]: Finished difference Result 304 states and 309 transitions. [2018-10-04 14:35:11,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 14:35:11,931 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 142 [2018-10-04 14:35:11,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:11,933 INFO L225 Difference]: With dead ends: 304 [2018-10-04 14:35:11,933 INFO L226 Difference]: Without dead ends: 226 [2018-10-04 14:35:11,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s Time 4.7s impTime 43 [2018-10-04 14:35:11,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-04 14:35:11,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 147. [2018-10-04 14:35:11,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 14:35:11,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-10-04 14:35:11,958 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 142 [2018-10-04 14:35:11,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:11,958 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-10-04 14:35:11,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 14:35:11,959 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-10-04 14:35:11,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 14:35:11,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:11,959 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-04 14:35:11,959 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:11,959 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:11,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1796978306, now seen corresponding path program 32 times [2018-10-04 14:35:11,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:11,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:11,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:11,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:11,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:12,628 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 14:35:12,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:12,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:35:12,636 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:35:12,665 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:35:12,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:12,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:13,298 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 14:35:13,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:13,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-10-04 14:35:13,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 14:35:13,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 14:35:13,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:13,320 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 65 states. [2018-10-04 14:35:14,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:14,672 INFO L93 Difference]: Finished difference Result 315 states and 319 transitions. [2018-10-04 14:35:14,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 14:35:14,673 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 146 [2018-10-04 14:35:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:14,674 INFO L225 Difference]: With dead ends: 315 [2018-10-04 14:35:14,674 INFO L226 Difference]: Without dead ends: 152 [2018-10-04 14:35:14,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 24 [2018-10-04 14:35:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-04 14:35:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2018-10-04 14:35:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-04 14:35:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-04 14:35:14,709 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 146 [2018-10-04 14:35:14,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:14,709 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-04 14:35:14,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 14:35:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-04 14:35:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-04 14:35:14,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:14,711 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-04 14:35:14,711 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:14,711 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:14,711 INFO L82 PathProgramCache]: Analyzing trace with hash -193355018, now seen corresponding path program 33 times [2018-10-04 14:35:14,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:14,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:14,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:14,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:14,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:16,500 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 14:35:16,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:16,501 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 14:35:16,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:35:16,559 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 14:35:16,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:16,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:18,501 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 14:35:18,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:18,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 90 [2018-10-04 14:35:18,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 14:35:18,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 14:35:18,523 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:18,523 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 91 states. [2018-10-04 14:35:28,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:28,412 INFO L93 Difference]: Finished difference Result 401 states and 407 transitions. [2018-10-04 14:35:28,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-10-04 14:35:28,412 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 149 [2018-10-04 14:35:28,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:28,414 INFO L225 Difference]: With dead ends: 401 [2018-10-04 14:35:28,414 INFO L226 Difference]: Without dead ends: 234 [2018-10-04 14:35:28,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5s Time 8.5s impTime 64 [2018-10-04 14:35:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-04 14:35:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 157. [2018-10-04 14:35:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 14:35:28,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-04 14:35:28,447 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 149 [2018-10-04 14:35:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:28,447 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-04 14:35:28,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 14:35:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-04 14:35:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 14:35:28,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:28,448 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-10-04 14:35:28,448 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:28,448 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:28,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1380130469, now seen corresponding path program 34 times [2018-10-04 14:35:28,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:28,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:28,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:28,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:28,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:30,955 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 14:35:30,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:30,955 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 14:35:30,963 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:35:30,994 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:35:30,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:30,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:32,103 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 14:35:32,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:32,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 70 [2018-10-04 14:35:32,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 14:35:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 14:35:32,130 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:32,130 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 71 states. [2018-10-04 14:35:40,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:40,217 INFO L93 Difference]: Finished difference Result 334 states and 339 transitions. [2018-10-04 14:35:40,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 14:35:40,218 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 156 [2018-10-04 14:35:40,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:40,219 INFO L225 Difference]: With dead ends: 334 [2018-10-04 14:35:40,219 INFO L226 Difference]: Without dead ends: 248 [2018-10-04 14:35:40,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s Time 5.8s impTime 46 [2018-10-04 14:35:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-04 14:35:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 161. [2018-10-04 14:35:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 14:35:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-10-04 14:35:40,258 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 156 [2018-10-04 14:35:40,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:40,258 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-10-04 14:35:40,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 14:35:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-10-04 14:35:40,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 14:35:40,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:40,259 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-04 14:35:40,260 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:40,260 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:40,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1719166132, now seen corresponding path program 35 times [2018-10-04 14:35:40,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:40,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:40,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:40,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:40,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:41,381 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 14:35:41,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:41,382 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 14:35:41,391 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:35:41,434 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-04 14:35:41,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:41,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:43,173 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 14:35:43,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:43,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-10-04 14:35:43,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 14:35:43,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 14:35:43,195 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:43,195 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 71 states. [2018-10-04 14:35:44,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:44,850 INFO L93 Difference]: Finished difference Result 345 states and 349 transitions. [2018-10-04 14:35:44,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 14:35:44,850 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 160 [2018-10-04 14:35:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:44,852 INFO L225 Difference]: With dead ends: 345 [2018-10-04 14:35:44,852 INFO L226 Difference]: Without dead ends: 166 [2018-10-04 14:35:44,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 1.7s impTime 26 [2018-10-04 14:35:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-04 14:35:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2018-10-04 14:35:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-04 14:35:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-10-04 14:35:44,881 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 160 [2018-10-04 14:35:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:44,881 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-10-04 14:35:44,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 14:35:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-10-04 14:35:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-04 14:35:44,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:44,882 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-04 14:35:44,882 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:44,882 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:44,882 INFO L82 PathProgramCache]: Analyzing trace with hash -148438332, now seen corresponding path program 36 times [2018-10-04 14:35:44,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:44,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:44,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:44,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:44,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:46,941 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 14:35:46,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:46,941 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 14:35:46,949 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:35:46,997 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-04 14:35:46,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:47,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:48,147 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 14:35:48,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:48,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 73 [2018-10-04 14:35:48,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 14:35:48,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 14:35:48,168 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:48,168 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 74 states. [2018-10-04 14:35:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:57,554 INFO L93 Difference]: Finished difference Result 349 states and 354 transitions. [2018-10-04 14:35:57,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 14:35:57,555 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 163 [2018-10-04 14:35:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:57,557 INFO L225 Difference]: With dead ends: 349 [2018-10-04 14:35:57,557 INFO L226 Difference]: Without dead ends: 259 [2018-10-04 14:35:57,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s Time 5.9s impTime 48 [2018-10-04 14:35:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-04 14:35:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 168. [2018-10-04 14:35:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-04 14:35:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2018-10-04 14:35:57,587 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2018-10-04 14:35:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:57,588 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2018-10-04 14:35:57,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 14:35:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2018-10-04 14:35:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-04 14:35:57,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:57,589 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-04 14:35:57,589 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:57,589 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:57,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1550952469, now seen corresponding path program 37 times [2018-10-04 14:35:57,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:57,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:57,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:57,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:57,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:58,784 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 14:35:58,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:58,785 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 14:35:58,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:35:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:58,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:59,561 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 14:35:59,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:59,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-10-04 14:35:59,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 14:35:59,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 14:35:59,583 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:59,584 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 74 states. [2018-10-04 14:36:01,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:01,462 INFO L93 Difference]: Finished difference Result 360 states and 364 transitions. [2018-10-04 14:36:01,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 14:36:01,463 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 167 [2018-10-04 14:36:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:01,464 INFO L225 Difference]: With dead ends: 360 [2018-10-04 14:36:01,464 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 14:36:01,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.7s impTime 27 [2018-10-04 14:36:01,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 14:36:01,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2018-10-04 14:36:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 14:36:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-10-04 14:36:01,498 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-10-04 14:36:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:01,498 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-10-04 14:36:01,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 14:36:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-10-04 14:36:01,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 14:36:01,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:01,499 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-04 14:36:01,499 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:01,499 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:01,499 INFO L82 PathProgramCache]: Analyzing trace with hash -810935949, now seen corresponding path program 38 times [2018-10-04 14:36:01,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:01,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:01,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:01,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:36:01,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:04,609 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 14:36:04,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:04,609 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 14:36:04,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:36:04,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:36:04,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:04,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:05,995 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 14:36:06,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:06,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 76 [2018-10-04 14:36:06,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 14:36:06,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 14:36:06,017 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:06,018 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 77 states. [2018-10-04 14:36:17,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:17,508 INFO L93 Difference]: Finished difference Result 364 states and 369 transitions. [2018-10-04 14:36:17,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 14:36:17,509 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 170 [2018-10-04 14:36:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:17,510 INFO L225 Difference]: With dead ends: 364 [2018-10-04 14:36:17,510 INFO L226 Difference]: Without dead ends: 270 [2018-10-04 14:36:17,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s Time 8.0s impTime 51 [2018-10-04 14:36:17,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-04 14:36:17,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 175. [2018-10-04 14:36:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 14:36:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-04 14:36:17,552 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-10-04 14:36:17,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:17,552 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-04 14:36:17,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 14:36:17,552 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-04 14:36:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 14:36:17,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:17,553 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-04 14:36:17,554 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:17,554 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:17,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1036484838, now seen corresponding path program 39 times [2018-10-04 14:36:17,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:17,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:17,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:17,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:17,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:19,896 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 14:36:19,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:19,897 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 14:36:19,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:36:19,951 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-04 14:36:19,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:19,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:20,740 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 14:36:20,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:20,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-10-04 14:36:20,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 14:36:20,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 14:36:20,761 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:20,762 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 77 states. [2018-10-04 14:36:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:22,765 INFO L93 Difference]: Finished difference Result 375 states and 379 transitions. [2018-10-04 14:36:22,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 14:36:22,766 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 174 [2018-10-04 14:36:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:22,767 INFO L225 Difference]: With dead ends: 375 [2018-10-04 14:36:22,767 INFO L226 Difference]: Without dead ends: 180 [2018-10-04 14:36:22,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 2.7s impTime 28 [2018-10-04 14:36:22,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-04 14:36:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2018-10-04 14:36:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-04 14:36:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-10-04 14:36:22,803 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 174 [2018-10-04 14:36:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:22,803 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-10-04 14:36:22,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 14:36:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-10-04 14:36:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-04 14:36:22,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:22,804 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-04 14:36:22,804 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:22,804 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:22,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1003391854, now seen corresponding path program 40 times [2018-10-04 14:36:22,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:22,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:22,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:22,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:22,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:25,045 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 14:36:25,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:25,045 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 14:36:25,053 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:36:25,085 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:36:25,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:25,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:26,399 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 14:36:26,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:26,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 79 [2018-10-04 14:36:26,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 14:36:26,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 14:36:26,420 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:26,420 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 80 states. [2018-10-04 14:36:39,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:39,147 INFO L93 Difference]: Finished difference Result 379 states and 384 transitions. [2018-10-04 14:36:39,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 14:36:39,147 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 177 [2018-10-04 14:36:39,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:39,149 INFO L225 Difference]: With dead ends: 379 [2018-10-04 14:36:39,149 INFO L226 Difference]: Without dead ends: 281 [2018-10-04 14:36:39,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9s Time 8.1s impTime 53 [2018-10-04 14:36:39,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-04 14:36:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2018-10-04 14:36:39,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-04 14:36:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-10-04 14:36:39,194 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 177 [2018-10-04 14:36:39,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:39,194 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-10-04 14:36:39,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 14:36:39,195 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-10-04 14:36:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-04 14:36:39,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:39,195 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-04 14:36:39,195 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:39,196 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:39,196 INFO L82 PathProgramCache]: Analyzing trace with hash 525284025, now seen corresponding path program 41 times [2018-10-04 14:36:39,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:39,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:39,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:39,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:39,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:40,170 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 14:36:40,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:40,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:36:40,179 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:36:40,225 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-04 14:36:40,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:40,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:41,015 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 14:36:41,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:41,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-10-04 14:36:41,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 14:36:41,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 14:36:41,038 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:41,038 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 80 states. [2018-10-04 14:36:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:36:43,230 INFO L93 Difference]: Finished difference Result 390 states and 394 transitions. [2018-10-04 14:36:43,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 14:36:43,231 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 181 [2018-10-04 14:36:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:36:43,232 INFO L225 Difference]: With dead ends: 390 [2018-10-04 14:36:43,232 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 14:36:43,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime 30 [2018-10-04 14:36:43,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 14:36:43,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2018-10-04 14:36:43,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 14:36:43,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-04 14:36:43,283 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 181 [2018-10-04 14:36:43,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:36:43,283 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-04 14:36:43,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 14:36:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-04 14:36:43,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-04 14:36:43,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:36:43,285 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-04 14:36:43,285 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:36:43,285 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:36:43,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1479170495, now seen corresponding path program 42 times [2018-10-04 14:36:43,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:36:43,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:36:43,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:43,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:36:43,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:36:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:36:45,427 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 14:36:45,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:36:45,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:36:45,434 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:36:45,485 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-04 14:36:45,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:36:45,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:36:47,023 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 14:36:47,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:36:47,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 82 [2018-10-04 14:36:47,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 14:36:47,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 14:36:47,045 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:36:47,045 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 83 states. [2018-10-04 14:37:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:00,153 INFO L93 Difference]: Finished difference Result 394 states and 399 transitions. [2018-10-04 14:37:00,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 14:37:00,153 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 184 [2018-10-04 14:37:00,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:00,155 INFO L225 Difference]: With dead ends: 394 [2018-10-04 14:37:00,155 INFO L226 Difference]: Without dead ends: 292 [2018-10-04 14:37:00,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s Time 8.0s impTime 56 [2018-10-04 14:37:00,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-04 14:37:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 189. [2018-10-04 14:37:00,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-04 14:37:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-10-04 14:37:00,195 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 184 [2018-10-04 14:37:00,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:00,195 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-10-04 14:37:00,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 14:37:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-10-04 14:37:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 14:37:00,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:00,196 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-04 14:37:00,197 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:00,197 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:00,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1293219048, now seen corresponding path program 43 times [2018-10-04 14:37:00,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:00,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:00,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:00,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:00,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:01,584 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 14:37:01,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:01,584 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 14:37:01,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:01,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:02,482 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 14:37:02,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:02,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-10-04 14:37:02,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 14:37:02,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 14:37:02,503 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:02,503 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 83 states. [2018-10-04 14:37:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:05,347 INFO L93 Difference]: Finished difference Result 405 states and 409 transitions. [2018-10-04 14:37:05,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 14:37:05,347 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 188 [2018-10-04 14:37:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:05,348 INFO L225 Difference]: With dead ends: 405 [2018-10-04 14:37:05,348 INFO L226 Difference]: Without dead ends: 194 [2018-10-04 14:37:05,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.0s impTime 32 [2018-10-04 14:37:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-04 14:37:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2018-10-04 14:37:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-04 14:37:05,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 194 transitions. [2018-10-04 14:37:05,387 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 194 transitions. Word has length 188 [2018-10-04 14:37:05,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:05,387 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 194 transitions. [2018-10-04 14:37:05,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 14:37:05,387 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 194 transitions. [2018-10-04 14:37:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-04 14:37:05,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:05,389 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-04 14:37:05,389 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:05,389 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:05,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1734936480, now seen corresponding path program 44 times [2018-10-04 14:37:05,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:05,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:05,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:05,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:05,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:07,670 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 14:37:07,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:07,670 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 14:37:07,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:37:07,720 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:37:07,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:07,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 1352 proven. 1106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:10,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:10,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58] total 114 [2018-10-04 14:37:10,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-10-04 14:37:10,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-10-04 14:37:10,956 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:10,957 INFO L87 Difference]: Start difference. First operand 192 states and 194 transitions. Second operand 115 states. Received shutdown request... [2018-10-04 14:37:21,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-10-04 14:37:21,446 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 14:37:21,452 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 14:37:21,452 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 02:37:21 BoogieIcfgContainer [2018-10-04 14:37:21,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 14:37:21,453 INFO L168 Benchmark]: Toolchain (without parser) took 242336.00 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -125.3 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 89.6 MB). Peak memory consumption was 450.2 MB. Max. memory is 7.1 GB. [2018-10-04 14:37:21,455 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:37:21,456 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.85 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:37:21,456 INFO L168 Benchmark]: Boogie Preprocessor took 25.42 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:37:21,457 INFO L168 Benchmark]: RCFGBuilder took 324.47 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 14:37:21,457 INFO L168 Benchmark]: TraceAbstraction took 241937.47 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -125.3 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 68.4 MB). Peak memory consumption was 429.1 MB. Max. memory is 7.1 GB. [2018-10-04 14:37:21,461 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 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.85 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.42 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 324.47 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 241937.47 ms. Allocated memory was 1.6 GB in the beginning and 1.4 GB in the end (delta: -125.3 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 68.4 MB). Peak memory consumption was 429.1 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 constructing difference of abstraction (192states) and FLOYD_HOARE automaton (currently 133 states, 115 states before enhancement), while ReachableStatesComputation was computing reachable states (235 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 241.8s OverallTime, 48 OverallIterations, 27 TraceHistogramMax, 159.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 869 SDtfs, 4273 SDslu, 24528 SDs, 0 SdLazy, 124134 SolverSat, 1666 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 71.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7418 GetRequests, 3755 SyntacticMatches, 18 SemanticMatches, 3645 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 143.4s 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, 1.3s SatisfiabilityAnalysisTime, 77.6s InterpolantComputationTime, 9196 NumberOfCodeBlocks, 9094 NumberOfCodeBlocksAsserted, 405 NumberOfCheckSat, 9103 ConstructedInterpolants, 0 QuantifiedInterpolants, 9028537 SizeOfPredicates, 144 NumberOfNonLiveVariables, 6667 ConjunctsInSsa, 1952 ConjunctsInUnsatCore, 93 InterpolantComputations, 3 PerfectInterpolantSequences, 23919/79214 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_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_14-37-21-472.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_14-37-21-472.csv Completed graceful shutdown