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/doubleLoopUniformIterations.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:58:35,562 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:58:35,564 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:58:35,582 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:58:35,582 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:58:35,584 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:58:35,585 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:58:35,588 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:58:35,591 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:58:35,592 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:58:35,592 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 12:58:35,627 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 12:58:35,641 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:58:35,641 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:58:35,642 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:58:35,642 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:58:35,643 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:58:35,643 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:58:35,643 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:58:35,644 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:58:35,644 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:58:35,644 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:58:35,644 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:58:35,644 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:58:35,645 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:58:35,645 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:58:35,645 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:58:35,645 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:58:35,645 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:58:35,646 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:58:35,646 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:58:35,646 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:58:35,646 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:58:35,646 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:58:35,647 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:58:35,647 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:58:35,647 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:58:35,647 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:58:35,647 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:58:35,647 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:58:35,648 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:58:35,648 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:58:35,648 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 12:58:35,711 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:58:35,725 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:58:35,732 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:58:35,733 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:58:35,734 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:58:35,734 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl [2018-10-04 12:58:35,735 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/doubleLoopUniformIterations.bpl' [2018-10-04 12:58:35,774 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:58:35,776 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:58:35,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:58:35,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:58:35,777 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:58:35,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:35" (1/1) ... [2018-10-04 12:58:35,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:35" (1/1) ... [2018-10-04 12:58:35,822 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 12:58:35,822 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 12:58:35,823 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 12:58:35,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:58:35,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:58:35,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:58:35,826 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:58:35,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:35" (1/1) ... [2018-10-04 12:58:35,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:35" (1/1) ... [2018-10-04 12:58:35,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:35" (1/1) ... [2018-10-04 12:58:35,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:35" (1/1) ... [2018-10-04 12:58:35,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:35" (1/1) ... [2018-10-04 12:58:35,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:35" (1/1) ... [2018-10-04 12:58:35,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:35" (1/1) ... [2018-10-04 12:58:35,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:58:35,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:58:35,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:58:35,852 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:58:35,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:58:35,920 INFO L130 BoogieDeclarations]: Found specification of procedure Main [2018-10-04 12:58:35,920 INFO L138 BoogieDeclarations]: Found implementation of procedure Main [2018-10-04 12:58:36,205 INFO L338 CfgBuilder]: Using library mode [2018-10-04 12:58:36,206 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:58:36 BoogieIcfgContainer [2018-10-04 12:58:36,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:58:36,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:58:36,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:58:36,211 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:58:36,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:35" (1/2) ... [2018-10-04 12:58:36,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16001a22 and model type doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:58:36, skipping insertion in model container [2018-10-04 12:58:36,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:58:36" (2/2) ... [2018-10-04 12:58:36,214 INFO L112 eAbstractionObserver]: Analyzing ICFG doubleLoopUniformIterations.bpl [2018-10-04 12:58:36,225 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:58:36,238 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-10-04 12:58:36,294 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:58:36,295 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:58:36,295 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:58:36,295 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:58:36,295 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:58:36,296 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:58:36,296 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:58:36,296 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:58:36,296 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:58:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-04 12:58:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:58:36,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:36,328 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:58:36,329 INFO L423 AbstractCegarLoop]: === Iteration 1 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:36,337 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:36,338 INFO L82 PathProgramCache]: Analyzing trace with hash 926725, now seen corresponding path program 1 times [2018-10-04 12:58:36,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:36,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:36,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:36,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:36,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:36,492 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:58:36,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 12:58:36,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:58:36,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:58:36,511 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:36,513 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-10-04 12:58:36,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:36,622 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-10-04 12:58:36,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:58:36,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 12:58:36,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:36,658 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:58:36,658 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 12:58:36,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 12:58:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 12:58:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 12:58:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 12:58:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-04 12:58:36,714 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2018-10-04 12:58:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:36,715 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-04 12:58:36,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:58:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-04 12:58:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 12:58:36,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:36,716 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 12:58:36,716 INFO L423 AbstractCegarLoop]: === Iteration 2 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:36,716 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:36,716 INFO L82 PathProgramCache]: Analyzing trace with hash 28728519, now seen corresponding path program 1 times [2018-10-04 12:58:36,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:36,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:36,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:36,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:36,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:36,756 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:58:36,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-04 12:58:36,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:58:36,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:58:36,758 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:36,758 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2018-10-04 12:58:36,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:36,794 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 12:58:36,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:58:36,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-04 12:58:36,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:36,795 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:58:36,795 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:58:36,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 12:58:36,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:58:36,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:58:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:58:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-10-04 12:58:36,799 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-10-04 12:58:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:36,799 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-10-04 12:58:36,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:58:36,799 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-10-04 12:58:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:58:36,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:36,800 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 12:58:36,800 INFO L423 AbstractCegarLoop]: === Iteration 3 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:36,800 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:36,801 INFO L82 PathProgramCache]: Analyzing trace with hash 891297133, now seen corresponding path program 1 times [2018-10-04 12:58:36,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:36,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:36,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:36,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:36,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:36,880 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 12:58:36,880 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:58:36,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:58:36,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:58:36,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:58:36,881 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:36,881 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-10-04 12:58:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:36,922 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 12:58:36,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:58:36,922 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 12:58:36,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:36,923 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:58:36,923 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 12:58:36,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 2 [2018-10-04 12:58:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 12:58:36,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 12:58:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 12:58:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-10-04 12:58:36,927 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-10-04 12:58:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:36,927 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-10-04 12:58:36,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:58:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-10-04 12:58:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 12:58:36,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:36,928 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:58:36,928 INFO L423 AbstractCegarLoop]: === Iteration 4 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:36,929 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:36,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1860345825, now seen corresponding path program 1 times [2018-10-04 12:58:36,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:36,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:36,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:36,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:36,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:37,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:37,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:37,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:37,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:37,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:37,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-10-04 12:58:37,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:58:37,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:58:37,312 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:37,312 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2018-10-04 12:58:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:37,366 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-10-04 12:58:37,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:58:37,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-04 12:58:37,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:37,368 INFO L225 Difference]: With dead ends: 14 [2018-10-04 12:58:37,368 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:58:37,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 2 [2018-10-04 12:58:37,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:58:37,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2018-10-04 12:58:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 12:58:37,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-04 12:58:37,372 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-10-04 12:58:37,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:37,372 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-04 12:58:37,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:58:37,373 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-04 12:58:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:58:37,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:37,374 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:58:37,374 INFO L423 AbstractCegarLoop]: === Iteration 5 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:37,374 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:37,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1836084205, now seen corresponding path program 2 times [2018-10-04 12:58:37,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:37,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:37,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:37,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:37,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:37,451 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 12:58:37,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:37,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:37,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:37,479 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:37,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:37,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:37,563 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 12:58:37,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:37,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:58:37,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:58:37,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:58:37,592 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:37,592 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2018-10-04 12:58:37,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:37,787 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2018-10-04 12:58:37,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:58:37,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 12:58:37,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:37,788 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:58:37,789 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:58:37,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 12:58:37,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:58:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:58:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:58:37,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 12:58:37,793 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2018-10-04 12:58:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:37,794 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 12:58:37,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:58:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 12:58:37,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:58:37,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:37,795 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:58:37,796 INFO L423 AbstractCegarLoop]: === Iteration 6 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:37,796 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:37,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1860095751, now seen corresponding path program 3 times [2018-10-04 12:58:37,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:37,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:37,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:37,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:37,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:37,933 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 12:58:37,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:37,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:37,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:37,960 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-04 12:58:37,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:37,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:38,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:38,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:58:38,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:58:38,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:58:38,029 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:38,029 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-04 12:58:38,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:38,108 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-04 12:58:38,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:58:38,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 12:58:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:38,110 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:58:38,110 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 12:58:38,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 12:58:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 12:58:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 12:58:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 12:58:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-10-04 12:58:38,114 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-10-04 12:58:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:38,114 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-10-04 12:58:38,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:58:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2018-10-04 12:58:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:58:38,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:38,115 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2018-10-04 12:58:38,115 INFO L423 AbstractCegarLoop]: === Iteration 7 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:38,115 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:38,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1828331911, now seen corresponding path program 4 times [2018-10-04 12:58:38,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:38,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:38,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:38,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:38,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:38,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:38,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:38,202 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:38,212 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:38,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:38,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:38,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:38,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 12:58:38,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:58:38,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:58:38,364 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:38,364 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2018-10-04 12:58:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:38,459 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-10-04 12:58:38,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:58:38,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-10-04 12:58:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:38,461 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:58:38,461 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:58:38,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 12:58:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:58:38,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-10-04 12:58:38,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 12:58:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-04 12:58:38,465 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-04 12:58:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:38,465 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-04 12:58:38,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:58:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-04 12:58:38,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:58:38,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:38,466 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-04 12:58:38,467 INFO L423 AbstractCegarLoop]: === Iteration 8 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:38,467 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:38,467 INFO L82 PathProgramCache]: Analyzing trace with hash 843652871, now seen corresponding path program 5 times [2018-10-04 12:58:38,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:38,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:38,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:38,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:38,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:38,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:38,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:38,548 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:38,559 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-10-04 12:58:38,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:38,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:38,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:38,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:58:38,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:58:38,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:58:38,612 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:38,612 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2018-10-04 12:58:38,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:38,666 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-10-04 12:58:38,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:58:38,667 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 12:58:38,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:38,667 INFO L225 Difference]: With dead ends: 18 [2018-10-04 12:58:38,668 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:58:38,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-04 12:58:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:58:38,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:58:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:58:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 12:58:38,671 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2018-10-04 12:58:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:38,671 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 12:58:38,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:58:38,672 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 12:58:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:58:38,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:38,672 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2018-10-04 12:58:38,673 INFO L423 AbstractCegarLoop]: === Iteration 9 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:38,673 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1588010797, now seen corresponding path program 6 times [2018-10-04 12:58:38,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:38,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:38,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:38,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:38,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:38,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:38,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:38,806 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:38,815 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-10-04 12:58:38,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:38,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:38,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:38,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:58:38,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:58:38,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:58:38,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:38,886 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-10-04 12:58:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:38,963 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-10-04 12:58:38,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:58:38,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 12:58:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:38,965 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:58:38,965 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 12:58:38,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 12:58:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 12:58:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 12:58:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 12:58:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-10-04 12:58:38,969 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2018-10-04 12:58:38,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:38,969 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-10-04 12:58:38,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:58:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-10-04 12:58:38,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 12:58:38,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:38,970 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2018-10-04 12:58:38,970 INFO L423 AbstractCegarLoop]: === Iteration 10 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:38,971 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:38,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1983632929, now seen corresponding path program 7 times [2018-10-04 12:58:38,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:38,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:38,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:38,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:38,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:39,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:39,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:39,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:39,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:39,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:39,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:58:39,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:58:39,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:58:39,608 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:39,608 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2018-10-04 12:58:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:39,713 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-04 12:58:39,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:58:39,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2018-10-04 12:58:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:39,714 INFO L225 Difference]: With dead ends: 20 [2018-10-04 12:58:39,714 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:58:39,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 4 [2018-10-04 12:58:39,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:58:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-04 12:58:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:58:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-04 12:58:39,718 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2018-10-04 12:58:39,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:39,718 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-04 12:58:39,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:58:39,718 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-04 12:58:39,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:58:39,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:39,719 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-04 12:58:39,719 INFO L423 AbstractCegarLoop]: === Iteration 11 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:39,720 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:39,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1363017133, now seen corresponding path program 8 times [2018-10-04 12:58:39,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:39,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:39,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:39,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:39,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:39,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:39,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:39,930 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:39,939 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:39,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:39,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:40,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:40,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:58:40,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:58:40,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:58:40,018 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:40,018 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2018-10-04 12:58:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:40,050 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-10-04 12:58:40,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:58:40,050 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 12:58:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:40,051 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:58:40,051 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:58:40,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 4 [2018-10-04 12:58:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:58:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:58:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:58:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-04 12:58:40,054 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 12 [2018-10-04 12:58:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:40,054 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-04 12:58:40,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:58:40,054 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-04 12:58:40,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:58:40,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:40,055 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2018-10-04 12:58:40,055 INFO L423 AbstractCegarLoop]: === Iteration 12 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:40,055 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:40,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1331690937, now seen corresponding path program 9 times [2018-10-04 12:58:40,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:40,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:40,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:40,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:40,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:40,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:40,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:40,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:40,167 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 12:58:40,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:40,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:40,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:40,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:58:40,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:58:40,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:58:40,225 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:40,225 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2018-10-04 12:58:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:40,294 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-04 12:58:40,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:58:40,295 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 12:58:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:40,295 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:58:40,295 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:58:40,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 5 [2018-10-04 12:58:40,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:58:40,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 12:58:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:58:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-10-04 12:58:40,301 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2018-10-04 12:58:40,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:40,302 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-10-04 12:58:40,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:58:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-10-04 12:58:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 12:58:40,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:40,303 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2018-10-04 12:58:40,303 INFO L423 AbstractCegarLoop]: === Iteration 13 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:40,304 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:40,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1667192391, now seen corresponding path program 10 times [2018-10-04 12:58:40,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:40,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:40,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:40,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:40,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:40,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:40,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:40,398 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:40,406 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:40,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:40,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:40,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:40,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:58:40,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:58:40,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:58:40,501 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:40,501 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-10-04 12:58:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:40,585 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-10-04 12:58:40,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:58:40,585 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-10-04 12:58:40,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:40,586 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:58:40,586 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 12:58:40,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 5 [2018-10-04 12:58:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 12:58:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2018-10-04 12:58:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 12:58:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-04 12:58:40,592 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-10-04 12:58:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:40,592 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-04 12:58:40,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:58:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-04 12:58:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:58:40,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:40,593 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-04 12:58:40,593 INFO L423 AbstractCegarLoop]: === Iteration 14 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:40,594 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:40,594 INFO L82 PathProgramCache]: Analyzing trace with hash 143295047, now seen corresponding path program 11 times [2018-10-04 12:58:40,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:40,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:40,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:40,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:40,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:40,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:40,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:40,757 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:40,768 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 12:58:40,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:40,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:40,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:40,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:58:40,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:58:40,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:58:40,835 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:40,835 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2018-10-04 12:58:40,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:40,893 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-10-04 12:58:40,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:58:40,894 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 12:58:40,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:40,895 INFO L225 Difference]: With dead ends: 24 [2018-10-04 12:58:40,895 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:58:40,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 5 [2018-10-04 12:58:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:58:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:58:40,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:58:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-04 12:58:40,899 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2018-10-04 12:58:40,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:40,899 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-04 12:58:40,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:58:40,899 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-04 12:58:40,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:58:40,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:40,900 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2018-10-04 12:58:40,900 INFO L423 AbstractCegarLoop]: === Iteration 15 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:40,900 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:40,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1788276499, now seen corresponding path program 12 times [2018-10-04 12:58:40,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:40,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:40,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:40,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:40,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:40,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:40,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:40,997 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:41,006 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 12:58:41,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:41,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:41,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:41,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:58:41,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:58:41,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:58:41,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:41,085 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-10-04 12:58:41,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:41,120 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-10-04 12:58:41,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:58:41,120 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 12:58:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:41,121 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:58:41,121 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 12:58:41,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 12:58:41,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 12:58:41,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 12:58:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 12:58:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-04 12:58:41,126 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2018-10-04 12:58:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:41,126 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-04 12:58:41,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:58:41,126 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-04 12:58:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 12:58:41,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:41,127 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2018-10-04 12:58:41,127 INFO L423 AbstractCegarLoop]: === Iteration 16 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:41,127 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:41,128 INFO L82 PathProgramCache]: Analyzing trace with hash 397941857, now seen corresponding path program 13 times [2018-10-04 12:58:41,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:41,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:41,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:41,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:41,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:41,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:41,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:41,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:41,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:41,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:41,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:58:41,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:58:41,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:58:41,347 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:41,348 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-10-04 12:58:41,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:41,446 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-04 12:58:41,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:58:41,447 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-10-04 12:58:41,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:41,448 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:58:41,448 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:58:41,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 12:58:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:58:41,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-04 12:58:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 12:58:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-10-04 12:58:41,453 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2018-10-04 12:58:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:41,454 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-10-04 12:58:41,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:58:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-10-04 12:58:41,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:58:41,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:41,455 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-04 12:58:41,456 INFO L423 AbstractCegarLoop]: === Iteration 17 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:41,456 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:41,456 INFO L82 PathProgramCache]: Analyzing trace with hash -548765843, now seen corresponding path program 14 times [2018-10-04 12:58:41,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:41,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:41,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:41,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:41,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:41,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:41,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:41,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:41,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:41,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:41,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:41,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:41,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:58:41,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:58:41,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:58:41,725 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:41,725 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2018-10-04 12:58:41,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:41,821 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-10-04 12:58:41,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:58:41,821 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 12:58:41,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:41,822 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:58:41,822 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:58:41,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 12:58:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:58:41,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:58:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:58:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-04 12:58:41,826 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 16 [2018-10-04 12:58:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:41,827 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-04 12:58:41,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:58:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-04 12:58:41,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:58:41,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:41,828 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2018-10-04 12:58:41,828 INFO L423 AbstractCegarLoop]: === Iteration 18 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:41,828 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:41,828 INFO L82 PathProgramCache]: Analyzing trace with hash -297941625, now seen corresponding path program 15 times [2018-10-04 12:58:41,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:41,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:41,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:41,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:41,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:42,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:42,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:42,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:42,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:58:42,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:42,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:42,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:42,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:58:42,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:58:42,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:58:42,181 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:42,181 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-04 12:58:42,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:42,213 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-04 12:58:42,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:58:42,214 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 12:58:42,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:42,215 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:58:42,215 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 12:58:42,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 7 [2018-10-04 12:58:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 12:58:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 12:58:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 12:58:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-04 12:58:42,220 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2018-10-04 12:58:42,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:42,221 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-04 12:58:42,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:58:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-04 12:58:42,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 12:58:42,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:42,222 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2018-10-04 12:58:42,223 INFO L423 AbstractCegarLoop]: === Iteration 19 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:42,223 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:42,223 INFO L82 PathProgramCache]: Analyzing trace with hash -646317305, now seen corresponding path program 16 times [2018-10-04 12:58:42,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:42,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:42,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:42,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:42,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:42,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:42,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:42,352 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:42,377 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:42,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:42,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:42,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:42,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:58:42,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:58:42,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:58:42,659 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:42,659 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2018-10-04 12:58:42,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:42,844 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-10-04 12:58:42,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:58:42,844 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-10-04 12:58:42,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:42,845 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:58:42,845 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 12:58:42,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime 7 [2018-10-04 12:58:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 12:58:42,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-10-04 12:58:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 12:58:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-04 12:58:42,849 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2018-10-04 12:58:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:42,849 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-04 12:58:42,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:58:42,849 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-04 12:58:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:58:42,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:42,850 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-04 12:58:42,850 INFO L423 AbstractCegarLoop]: === Iteration 20 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:42,850 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:42,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1438938503, now seen corresponding path program 17 times [2018-10-04 12:58:42,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:42,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:42,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:42,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:42,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:42,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:42,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:43,004 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:43,029 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-04 12:58:43,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:43,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:43,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:43,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:58:43,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:58:43,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:58:43,112 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:43,112 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2018-10-04 12:58:43,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:43,211 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-10-04 12:58:43,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:58:43,211 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 12:58:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:43,212 INFO L225 Difference]: With dead ends: 30 [2018-10-04 12:58:43,212 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:58:43,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 7 [2018-10-04 12:58:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:58:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:58:43,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:58:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-04 12:58:43,216 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2018-10-04 12:58:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:43,216 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-04 12:58:43,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:58:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-04 12:58:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:58:43,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:43,217 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2018-10-04 12:58:43,217 INFO L423 AbstractCegarLoop]: === Iteration 21 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:43,218 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash 624554669, now seen corresponding path program 18 times [2018-10-04 12:58:43,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:43,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:43,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:43,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:43,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:43,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:43,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:43,315 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:43,329 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 12:58:43,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:43,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:43,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:43,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:58:43,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:58:43,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:58:43,416 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:43,416 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-10-04 12:58:43,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:43,554 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-10-04 12:58:43,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:58:43,555 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 12:58:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:43,556 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:58:43,556 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 12:58:43,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 8 [2018-10-04 12:58:43,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 12:58:43,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 12:58:43,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 12:58:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-04 12:58:43,560 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2018-10-04 12:58:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:43,560 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-04 12:58:43,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:58:43,560 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-04 12:58:43,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 12:58:43,561 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:43,561 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2018-10-04 12:58:43,561 INFO L423 AbstractCegarLoop]: === Iteration 22 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:43,561 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:43,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2113703263, now seen corresponding path program 19 times [2018-10-04 12:58:43,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:43,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:43,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:43,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:43,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:43,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:43,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:43,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:43,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:43,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:43,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:58:43,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:58:43,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:58:43,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:43,834 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2018-10-04 12:58:44,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:44,025 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-04 12:58:44,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:58:44,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-10-04 12:58:44,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:44,026 INFO L225 Difference]: With dead ends: 32 [2018-10-04 12:58:44,027 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:58:44,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 8 [2018-10-04 12:58:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:58:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-04 12:58:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 12:58:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-04 12:58:44,031 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2018-10-04 12:58:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:44,031 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-04 12:58:44,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:58:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-04 12:58:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:58:44,032 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:44,032 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-04 12:58:44,032 INFO L423 AbstractCegarLoop]: === Iteration 23 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:44,033 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:44,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1100353235, now seen corresponding path program 20 times [2018-10-04 12:58:44,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:44,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:44,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:44,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:44,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:44,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:44,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:44,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:44,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:44,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:44,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:44,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:44,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:58:44,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:58:44,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:58:44,433 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:44,433 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2018-10-04 12:58:44,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:44,476 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-04 12:58:44,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:58:44,477 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 12:58:44,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:44,477 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:58:44,478 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:58:44,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 8 [2018-10-04 12:58:44,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:58:44,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:58:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:58:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-04 12:58:44,483 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-10-04 12:58:44,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:44,483 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-04 12:58:44,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:58:44,483 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-04 12:58:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:58:44,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:44,484 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2018-10-04 12:58:44,484 INFO L423 AbstractCegarLoop]: === Iteration 24 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:44,484 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:44,484 INFO L82 PathProgramCache]: Analyzing trace with hash -576448313, now seen corresponding path program 21 times [2018-10-04 12:58:44,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:44,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:44,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:44,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:44,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:44,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:44,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:44,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:44,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-04 12:58:44,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:44,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:45,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:45,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:58:45,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:58:45,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:58:45,204 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:45,204 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2018-10-04 12:58:45,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:45,236 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-04 12:58:45,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:58:45,237 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 12:58:45,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:45,237 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:58:45,238 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 12:58:45,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.1s impTime 9 [2018-10-04 12:58:45,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 12:58:45,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 12:58:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 12:58:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-04 12:58:45,242 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2018-10-04 12:58:45,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:45,242 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-04 12:58:45,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:58:45,242 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-04 12:58:45,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 12:58:45,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:45,243 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2018-10-04 12:58:45,243 INFO L423 AbstractCegarLoop]: === Iteration 25 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:45,243 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:45,244 INFO L82 PathProgramCache]: Analyzing trace with hash -690090041, now seen corresponding path program 22 times [2018-10-04 12:58:45,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:45,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:45,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:45,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:45,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:45,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:45,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:45,383 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:45,396 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:45,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:45,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:45,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:45,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:58:45,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:58:45,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:58:45,469 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:45,470 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2018-10-04 12:58:45,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:45,602 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-10-04 12:58:45,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:58:45,602 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2018-10-04 12:58:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:45,603 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:58:45,603 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 12:58:45,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 9 [2018-10-04 12:58:45,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 12:58:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2018-10-04 12:58:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:58:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-04 12:58:45,609 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2018-10-04 12:58:45,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:45,609 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-04 12:58:45,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:58:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-04 12:58:45,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:58:45,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:45,610 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-04 12:58:45,610 INFO L423 AbstractCegarLoop]: === Iteration 26 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:45,610 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:45,610 INFO L82 PathProgramCache]: Analyzing trace with hash 81983687, now seen corresponding path program 23 times [2018-10-04 12:58:45,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:45,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:45,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:45,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:45,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:46,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:46,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:46,050 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:46,106 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 12:58:46,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:46,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:46,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:46,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:58:46,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:58:46,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:58:46,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:46,210 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2018-10-04 12:58:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:46,271 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-04 12:58:46,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:58:46,272 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 12:58:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:46,272 INFO L225 Difference]: With dead ends: 36 [2018-10-04 12:58:46,273 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:58:46,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 9 [2018-10-04 12:58:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:58:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:58:46,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:58:46,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-04 12:58:46,277 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2018-10-04 12:58:46,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:46,278 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-04 12:58:46,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:58:46,278 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-04 12:58:46,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:58:46,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:46,279 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2018-10-04 12:58:46,279 INFO L423 AbstractCegarLoop]: === Iteration 27 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:46,279 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:46,279 INFO L82 PathProgramCache]: Analyzing trace with hash -856832915, now seen corresponding path program 24 times [2018-10-04 12:58:46,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:46,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:46,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:46,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:46,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:46,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:46,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:46,698 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:46,711 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-04 12:58:46,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:46,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:46,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:46,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:58:46,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:58:46,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:58:46,809 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:46,809 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-10-04 12:58:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:46,848 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-10-04 12:58:46,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:58:46,849 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 12:58:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:46,849 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:58:46,850 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 12:58:46,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 10 [2018-10-04 12:58:46,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 12:58:46,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 12:58:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:58:46,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-04 12:58:46,854 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2018-10-04 12:58:46,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:46,855 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-04 12:58:46,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:58:46,855 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-04 12:58:46,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:58:46,858 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:46,858 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2018-10-04 12:58:46,858 INFO L423 AbstractCegarLoop]: === Iteration 28 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:46,858 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:46,858 INFO L82 PathProgramCache]: Analyzing trace with hash -792078111, now seen corresponding path program 25 times [2018-10-04 12:58:46,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:46,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:46,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:46,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:46,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:47,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:47,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:47,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:47,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:47,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:47,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:58:47,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:58:47,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:58:47,279 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:47,279 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2018-10-04 12:58:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:47,461 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-04 12:58:47,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:58:47,462 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-10-04 12:58:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:47,463 INFO L225 Difference]: With dead ends: 38 [2018-10-04 12:58:47,463 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:58:47,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 10 [2018-10-04 12:58:47,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:58:47,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-04 12:58:47,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 12:58:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-04 12:58:47,467 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2018-10-04 12:58:47,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:47,467 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-04 12:58:47,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:58:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-04 12:58:47,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:58:47,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:47,468 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-04 12:58:47,468 INFO L423 AbstractCegarLoop]: === Iteration 29 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:47,469 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:47,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1215320813, now seen corresponding path program 26 times [2018-10-04 12:58:47,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:47,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:47,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:47,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:47,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:47,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:47,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:47,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:47,632 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:47,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:47,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:47,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:47,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:58:47,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:58:47,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:58:47,722 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:47,723 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2018-10-04 12:58:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:47,811 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-10-04 12:58:47,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:58:47,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 12:58:47,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:47,812 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:58:47,812 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:58:47,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 10 [2018-10-04 12:58:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:58:47,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:58:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:58:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-04 12:58:47,815 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2018-10-04 12:58:47,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:47,815 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-04 12:58:47,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:58:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-04 12:58:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:58:47,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:47,816 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2018-10-04 12:58:47,816 INFO L423 AbstractCegarLoop]: === Iteration 30 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:47,816 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:47,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2118190073, now seen corresponding path program 27 times [2018-10-04 12:58:47,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:47,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:47,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:47,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:47,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:48,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:48,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:48,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:48,029 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 12:58:48,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:48,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:48,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:48,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:58:48,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:58:48,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:58:48,201 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:48,201 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2018-10-04 12:58:48,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:48,273 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-04 12:58:48,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:58:48,273 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 12:58:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:48,274 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:58:48,274 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 12:58:48,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime 11 [2018-10-04 12:58:48,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 12:58:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 12:58:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 12:58:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-10-04 12:58:48,278 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2018-10-04 12:58:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:48,278 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-10-04 12:58:48,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:58:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-10-04 12:58:48,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 12:58:48,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:48,279 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2018-10-04 12:58:48,279 INFO L423 AbstractCegarLoop]: === Iteration 31 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:48,279 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:48,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1239444345, now seen corresponding path program 28 times [2018-10-04 12:58:48,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:48,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:48,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:48,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:48,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:49,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:49,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:49,777 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:49,790 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:49,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:49,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:49,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:49,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:58:49,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:58:49,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:58:49,868 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:49,868 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2018-10-04 12:58:50,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:50,117 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-04 12:58:50,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:58:50,117 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-10-04 12:58:50,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:50,118 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:58:50,118 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 12:58:50,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 11 [2018-10-04 12:58:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 12:58:50,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2018-10-04 12:58:50,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:58:50,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-04 12:58:50,124 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2018-10-04 12:58:50,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:50,124 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-04 12:58:50,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:58:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-04 12:58:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:58:50,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:50,125 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-04 12:58:50,125 INFO L423 AbstractCegarLoop]: === Iteration 32 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:50,126 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:50,126 INFO L82 PathProgramCache]: Analyzing trace with hash 231869447, now seen corresponding path program 29 times [2018-10-04 12:58:50,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:50,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:50,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:50,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:50,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:50,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:50,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:50,290 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:50,309 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 12:58:50,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:50,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:50,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:50,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:58:50,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:58:50,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:58:50,394 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:50,394 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-04 12:58:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:50,473 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2018-10-04 12:58:50,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:58:50,473 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 12:58:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:50,474 INFO L225 Difference]: With dead ends: 42 [2018-10-04 12:58:50,474 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:58:50,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 11 [2018-10-04 12:58:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:58:50,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:58:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:58:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-04 12:58:50,479 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2018-10-04 12:58:50,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:50,479 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-04 12:58:50,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:58:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-04 12:58:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:58:50,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:50,480 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1] [2018-10-04 12:58:50,480 INFO L423 AbstractCegarLoop]: === Iteration 33 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:50,480 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:50,480 INFO L82 PathProgramCache]: Analyzing trace with hash -27752915, now seen corresponding path program 30 times [2018-10-04 12:58:50,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:50,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:50,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:50,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:50,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:50,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:50,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:50,625 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:50,646 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:58:50,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:50,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:50,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:50,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:58:50,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:58:50,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:58:50,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:50,887 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-10-04 12:58:50,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:50,927 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-04 12:58:50,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:58:50,927 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 12:58:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:50,928 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:58:50,928 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 12:58:50,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime 12 [2018-10-04 12:58:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 12:58:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 12:58:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:58:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-04 12:58:50,933 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2018-10-04 12:58:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:50,933 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-04 12:58:50,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:58:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-04 12:58:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 12:58:50,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:50,934 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1] [2018-10-04 12:58:50,934 INFO L423 AbstractCegarLoop]: === Iteration 34 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:50,935 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:50,935 INFO L82 PathProgramCache]: Analyzing trace with hash -860401887, now seen corresponding path program 31 times [2018-10-04 12:58:50,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:50,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:50,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:50,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:50,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:51,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:51,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:51,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:51,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:51,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:51,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:58:51,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:58:51,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:58:51,334 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:51,334 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2018-10-04 12:58:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:51,600 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-04 12:58:51,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:58:51,600 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-04 12:58:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:51,601 INFO L225 Difference]: With dead ends: 44 [2018-10-04 12:58:51,601 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:58:51,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 12 [2018-10-04 12:58:51,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:58:51,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-04 12:58:51,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 12:58:51,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-04 12:58:51,607 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2018-10-04 12:58:51,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:51,607 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-04 12:58:51,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:58:51,607 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-04 12:58:51,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:58:51,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:51,608 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-04 12:58:51,608 INFO L423 AbstractCegarLoop]: === Iteration 35 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:51,608 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:51,608 INFO L82 PathProgramCache]: Analyzing trace with hash -902716243, now seen corresponding path program 32 times [2018-10-04 12:58:51,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:51,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:51,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:51,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:51,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:51,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:51,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:51,863 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:51,880 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:51,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:51,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:51,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:51,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:58:51,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:58:51,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:58:51,950 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:51,950 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 15 states. [2018-10-04 12:58:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:52,032 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-10-04 12:58:52,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:58:52,032 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 12:58:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:52,033 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:58:52,033 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:58:52,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 12 [2018-10-04 12:58:52,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:58:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:58:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:58:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-04 12:58:52,038 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2018-10-04 12:58:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:52,038 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-04 12:58:52,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:58:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-04 12:58:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:58:52,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:52,038 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1] [2018-10-04 12:58:52,039 INFO L423 AbstractCegarLoop]: === Iteration 36 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:52,039 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:52,039 INFO L82 PathProgramCache]: Analyzing trace with hash -361074873, now seen corresponding path program 33 times [2018-10-04 12:58:52,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:52,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:52,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:52,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:52,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:52,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:52,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:52,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:52,322 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 12:58:52,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:52,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:52,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:52,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:58:52,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:58:52,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:58:52,391 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:52,391 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2018-10-04 12:58:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:52,677 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-04 12:58:52,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:58:52,678 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 12:58:52,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:52,678 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:58:52,679 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 12:58:52,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 13 [2018-10-04 12:58:52,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 12:58:52,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 12:58:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 12:58:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-04 12:58:52,685 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2018-10-04 12:58:52,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:52,685 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-04 12:58:52,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:58:52,686 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-04 12:58:52,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 12:58:52,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:52,686 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1] [2018-10-04 12:58:52,686 INFO L423 AbstractCegarLoop]: === Iteration 37 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:52,686 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:52,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1691519303, now seen corresponding path program 34 times [2018-10-04 12:58:52,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:52,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:52,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:52,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:52,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:53,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:53,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:53,107 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:53,121 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:53,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:53,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:53,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:53,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:58:53,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:58:53,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:58:53,244 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:53,244 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2018-10-04 12:58:53,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:53,525 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2018-10-04 12:58:53,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:58:53,526 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2018-10-04 12:58:53,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:53,527 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:58:53,527 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 12:58:53,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 13 [2018-10-04 12:58:53,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 12:58:53,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-10-04 12:58:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 12:58:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-04 12:58:53,531 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2018-10-04 12:58:53,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:53,531 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-04 12:58:53,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:58:53,531 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-04 12:58:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:58:53,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:53,532 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-04 12:58:53,532 INFO L423 AbstractCegarLoop]: === Iteration 38 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:53,532 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:53,532 INFO L82 PathProgramCache]: Analyzing trace with hash 897429319, now seen corresponding path program 35 times [2018-10-04 12:58:53,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:53,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:53,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:53,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:53,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:53,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:53,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:53,952 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:53,971 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 12:58:53,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:53,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:54,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:54,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:58:54,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:58:54,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:58:54,047 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:54,047 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2018-10-04 12:58:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:54,114 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-10-04 12:58:54,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:58:54,115 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 12:58:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:54,115 INFO L225 Difference]: With dead ends: 48 [2018-10-04 12:58:54,116 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:58:54,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 13 [2018-10-04 12:58:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:58:54,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:58:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:58:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-04 12:58:54,119 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 30 [2018-10-04 12:58:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:54,119 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-04 12:58:54,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:58:54,119 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-04 12:58:54,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:58:54,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:54,119 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1] [2018-10-04 12:58:54,120 INFO L423 AbstractCegarLoop]: === Iteration 39 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:54,120 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:54,120 INFO L82 PathProgramCache]: Analyzing trace with hash 508442605, now seen corresponding path program 36 times [2018-10-04 12:58:54,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:54,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:54,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:54,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:54,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:54,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:54,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:54,270 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:54,291 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 12:58:54,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:54,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:54,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:54,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:58:54,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:58:54,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:58:54,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:54,415 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-10-04 12:58:54,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:54,482 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-10-04 12:58:54,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:58:54,482 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 12:58:54,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:54,483 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:58:54,483 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 12:58:54,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 14 [2018-10-04 12:58:54,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 12:58:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 12:58:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 12:58:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-10-04 12:58:54,488 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2018-10-04 12:58:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:54,488 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-10-04 12:58:54,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:58:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-10-04 12:58:54,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 12:58:54,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:54,489 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1] [2018-10-04 12:58:54,489 INFO L423 AbstractCegarLoop]: === Iteration 40 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:54,489 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1418209951, now seen corresponding path program 37 times [2018-10-04 12:58:54,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:54,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:54,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:54,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:54,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:54,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:54,780 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) [2018-10-04 12:58:54,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:54,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:54,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:54,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:58:54,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:58:54,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:58:54,894 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:54,895 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2018-10-04 12:58:55,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:55,161 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-04 12:58:55,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:58:55,161 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-10-04 12:58:55,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:55,162 INFO L225 Difference]: With dead ends: 50 [2018-10-04 12:58:55,162 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:58:55,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 14 [2018-10-04 12:58:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:58:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-04 12:58:55,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 12:58:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-04 12:58:55,166 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2018-10-04 12:58:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:55,166 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-04 12:58:55,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:58:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-04 12:58:55,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:58:55,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:55,167 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-04 12:58:55,167 INFO L423 AbstractCegarLoop]: === Iteration 41 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:55,167 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:55,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1014897043, now seen corresponding path program 38 times [2018-10-04 12:58:55,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:55,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:55,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:55,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:55,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:55,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:55,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:55,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:55,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:55,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:55,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:56,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:56,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:58:56,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:58:56,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:58:56,056 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:56,056 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2018-10-04 12:58:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:56,141 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-10-04 12:58:56,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:58:56,142 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 12:58:56,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:56,143 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:58:56,143 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:58:56,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 14 [2018-10-04 12:58:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:58:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:58:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:58:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-04 12:58:56,147 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2018-10-04 12:58:56,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:56,147 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-04 12:58:56,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:58:56,147 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-04 12:58:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:58:56,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:56,147 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2018-10-04 12:58:56,148 INFO L423 AbstractCegarLoop]: === Iteration 42 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:56,148 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:56,148 INFO L82 PathProgramCache]: Analyzing trace with hash -188583289, now seen corresponding path program 39 times [2018-10-04 12:58:56,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:56,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:56,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:56,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:56,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:56,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:56,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:56,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:56,335 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 12:58:56,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:56,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:56,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:56,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:58:56,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:58:56,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:58:56,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:56,415 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2018-10-04 12:58:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:56,474 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-04 12:58:56,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:58:56,474 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 12:58:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:56,475 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:58:56,475 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 12:58:56,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 15 [2018-10-04 12:58:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 12:58:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 12:58:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 12:58:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-04 12:58:56,479 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2018-10-04 12:58:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:56,479 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-04 12:58:56,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:58:56,480 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-04 12:58:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 12:58:56,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:56,480 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1] [2018-10-04 12:58:56,480 INFO L423 AbstractCegarLoop]: === Iteration 43 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:56,480 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:56,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1551176185, now seen corresponding path program 40 times [2018-10-04 12:58:56,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:56,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:56,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:56,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:56,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:56,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:56,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:56,822 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:56,840 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:56,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:56,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:57,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:57,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:58:57,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:58:57,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:58:57,018 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:57,018 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 17 states. [2018-10-04 12:58:57,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:57,333 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-10-04 12:58:57,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:58:57,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2018-10-04 12:58:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:57,334 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:58:57,334 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 12:58:57,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 15 [2018-10-04 12:58:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 12:58:57,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2018-10-04 12:58:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 12:58:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-10-04 12:58:57,338 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2018-10-04 12:58:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:57,339 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-10-04 12:58:57,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:58:57,339 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-10-04 12:58:57,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:58:57,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:57,339 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-04 12:58:57,339 INFO L423 AbstractCegarLoop]: === Iteration 44 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:57,340 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:57,340 INFO L82 PathProgramCache]: Analyzing trace with hash -841883001, now seen corresponding path program 41 times [2018-10-04 12:58:57,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:57,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:57,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:57,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:57,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:57,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:57,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:57,580 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:57,603 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 12:58:57,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:57,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:57,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:57,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:58:57,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:58:57,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:58:57,688 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:57,688 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2018-10-04 12:58:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:57,776 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2018-10-04 12:58:57,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:58:57,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 12:58:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:57,777 INFO L225 Difference]: With dead ends: 54 [2018-10-04 12:58:57,777 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:58:57,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 15 [2018-10-04 12:58:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:58:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:58:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:58:57,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-04 12:58:57,781 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 34 [2018-10-04 12:58:57,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:57,782 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-04 12:58:57,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:58:57,782 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-04 12:58:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:58:57,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:57,782 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1] [2018-10-04 12:58:57,782 INFO L423 AbstractCegarLoop]: === Iteration 45 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:57,783 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:57,783 INFO L82 PathProgramCache]: Analyzing trace with hash -995960403, now seen corresponding path program 42 times [2018-10-04 12:58:57,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:57,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:57,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:57,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:57,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:57,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:57,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:57,939 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:57,969 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 12:58:57,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:57,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:58,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:58,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:58:58,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:58:58,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:58:58,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:58,108 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-10-04 12:58:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:58,186 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-10-04 12:58:58,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:58:58,186 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 12:58:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:58,186 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:58:58,186 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 12:58:58,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 16 [2018-10-04 12:58:58,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 12:58:58,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 12:58:58,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 12:58:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-04 12:58:58,189 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 34 [2018-10-04 12:58:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:58,189 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-04 12:58:58,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:58:58,189 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-04 12:58:58,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 12:58:58,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:58,189 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1] [2018-10-04 12:58:58,190 INFO L423 AbstractCegarLoop]: === Iteration 46 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:58,190 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:58,190 INFO L82 PathProgramCache]: Analyzing trace with hash -810062943, now seen corresponding path program 43 times [2018-10-04 12:58:58,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:58,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:58,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:58,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:58,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:58,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:58,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:58,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:58,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:58,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:58,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:58:58,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:58:58,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:58:58,633 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:58,634 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 18 states. [2018-10-04 12:58:59,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:59,015 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-04 12:58:59,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:58:59,016 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2018-10-04 12:58:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:59,017 INFO L225 Difference]: With dead ends: 56 [2018-10-04 12:58:59,019 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:58:59,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 16 [2018-10-04 12:58:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:58:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-10-04 12:58:59,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 12:58:59,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-04 12:58:59,022 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2018-10-04 12:58:59,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:59,022 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-04 12:58:59,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:58:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-04 12:58:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:58:59,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:59,023 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-04 12:58:59,023 INFO L423 AbstractCegarLoop]: === Iteration 47 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:59,023 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:59,023 INFO L82 PathProgramCache]: Analyzing trace with hash 657791021, now seen corresponding path program 44 times [2018-10-04 12:58:59,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:59,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:59,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:59,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:59,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:59,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:59,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:59,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:59,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:59,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:59,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:59,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:59,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:58:59,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:58:59,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:58:59,335 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:59,335 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 19 states. [2018-10-04 12:58:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:59,442 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-10-04 12:58:59,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:58:59,443 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 12:58:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:59,444 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:58:59,444 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:58:59,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 16 [2018-10-04 12:58:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:58:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:58:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:58:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-04 12:58:59,447 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2018-10-04 12:58:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:59,447 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-04 12:58:59,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:58:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-04 12:58:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:58:59,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:59,448 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1] [2018-10-04 12:58:59,448 INFO L423 AbstractCegarLoop]: === Iteration 48 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:59,448 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:59,449 INFO L82 PathProgramCache]: Analyzing trace with hash 176358855, now seen corresponding path program 45 times [2018-10-04 12:58:59,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:59,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:59,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:59,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:59,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:59,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:59,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:59,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:59,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 12:58:59,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:59,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:59,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:59,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:58:59,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:58:59,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:58:59,870 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:59,870 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 19 states. [2018-10-04 12:58:59,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:59,920 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-04 12:58:59,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:58:59,920 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 12:58:59,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:59,921 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:58:59,921 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 12:58:59,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 17 [2018-10-04 12:58:59,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 12:58:59,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 12:58:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 12:58:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-10-04 12:58:59,925 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2018-10-04 12:58:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:59,925 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-10-04 12:58:59,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:58:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-10-04 12:58:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 12:58:59,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:59,926 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1] [2018-10-04 12:58:59,926 INFO L423 AbstractCegarLoop]: === Iteration 49 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:59,926 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:59,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1172095687, now seen corresponding path program 46 times [2018-10-04 12:58:59,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:59,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:59,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:59,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:59,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:00,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:00,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:00,194 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:00,213 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:00,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:00,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:00,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:00,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:59:00,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:59:00,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:59:00,315 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:00,315 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 19 states. [2018-10-04 12:59:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:00,916 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2018-10-04 12:59:00,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:59:00,916 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2018-10-04 12:59:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:00,917 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:59:00,917 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 12:59:00,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 17 [2018-10-04 12:59:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 12:59:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2018-10-04 12:59:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 12:59:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-04 12:59:00,921 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2018-10-04 12:59:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:00,921 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-04 12:59:00,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:59:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-04 12:59:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:59:00,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:00,922 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-04 12:59:00,922 INFO L423 AbstractCegarLoop]: === Iteration 50 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:00,923 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:00,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1975166407, now seen corresponding path program 47 times [2018-10-04 12:59:00,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:00,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:00,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:00,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:00,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:01,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:01,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:01,165 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:01,195 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 12:59:01,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:01,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:01,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:01,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:59:01,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:59:01,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:59:01,698 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:01,698 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2018-10-04 12:59:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:01,806 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-10-04 12:59:01,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:59:01,806 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 12:59:01,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:01,807 INFO L225 Difference]: With dead ends: 60 [2018-10-04 12:59:01,807 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:59:01,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.1s impTime 17 [2018-10-04 12:59:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:59:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:59:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:59:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-04 12:59:01,811 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2018-10-04 12:59:01,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:01,811 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-04 12:59:01,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:59:01,811 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-04 12:59:01,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:59:01,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:01,812 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1] [2018-10-04 12:59:01,812 INFO L423 AbstractCegarLoop]: === Iteration 51 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:01,812 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:01,812 INFO L82 PathProgramCache]: Analyzing trace with hash -64328851, now seen corresponding path program 48 times [2018-10-04 12:59:01,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:01,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:01,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:01,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:01,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:02,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:02,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:02,060 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:02,092 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 12:59:02,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:02,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:02,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:02,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:59:02,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:59:02,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:59:02,200 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:02,200 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-10-04 12:59:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:02,261 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-04 12:59:02,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:59:02,261 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 12:59:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:02,262 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:59:02,263 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 12:59:02,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 18 [2018-10-04 12:59:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 12:59:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 12:59:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 12:59:02,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-04 12:59:02,267 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2018-10-04 12:59:02,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:02,267 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-04 12:59:02,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:59:02,267 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-04 12:59:02,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 12:59:02,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:02,268 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1] [2018-10-04 12:59:02,268 INFO L423 AbstractCegarLoop]: === Iteration 52 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:02,268 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:02,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1994255903, now seen corresponding path program 49 times [2018-10-04 12:59:02,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:02,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:02,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:02,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:02,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:02,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:02,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:02,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:02,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:02,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:02,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:59:02,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:59:02,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:59:02,825 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:02,826 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2018-10-04 12:59:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:03,536 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-04 12:59:03,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:59:03,537 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2018-10-04 12:59:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:03,538 INFO L225 Difference]: With dead ends: 62 [2018-10-04 12:59:03,538 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:59:03,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 18 [2018-10-04 12:59:03,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:59:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2018-10-04 12:59:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 12:59:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-04 12:59:03,542 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2018-10-04 12:59:03,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:03,542 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-04 12:59:03,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:59:03,543 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-04 12:59:03,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:59:03,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:03,543 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-04 12:59:03,543 INFO L423 AbstractCegarLoop]: === Iteration 53 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:03,543 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:03,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1692452371, now seen corresponding path program 50 times [2018-10-04 12:59:03,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:03,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:03,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:03,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:03,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:04,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:04,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:04,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:04,340 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:04,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:04,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:04,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:04,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:59:04,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:59:04,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:59:04,533 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:04,533 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2018-10-04 12:59:04,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:04,651 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-10-04 12:59:04,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:59:04,652 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-04 12:59:04,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:04,652 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:59:04,653 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:59:04,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 18 [2018-10-04 12:59:04,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:59:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:59:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:59:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-04 12:59:04,657 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 40 [2018-10-04 12:59:04,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:04,657 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-04 12:59:04,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:59:04,657 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-04 12:59:04,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:59:04,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:04,658 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1] [2018-10-04 12:59:04,658 INFO L423 AbstractCegarLoop]: === Iteration 54 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:04,658 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:04,658 INFO L82 PathProgramCache]: Analyzing trace with hash -492295929, now seen corresponding path program 51 times [2018-10-04 12:59:04,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:04,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:04,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:04,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:04,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:04,860 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:04,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:04,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:04,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:04,920 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 12:59:04,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:04,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:05,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:05,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:59:05,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:59:05,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:59:05,030 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:05,030 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2018-10-04 12:59:05,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:05,094 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-04 12:59:05,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:59:05,094 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-04 12:59:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:05,095 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:59:05,095 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 12:59:05,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 6 [2018-10-04 12:59:05,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 12:59:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 12:59:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 12:59:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-04 12:59:05,099 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2018-10-04 12:59:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:05,099 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-04 12:59:05,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:59:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-04 12:59:05,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 12:59:05,100 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:05,100 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1] [2018-10-04 12:59:05,100 INFO L423 AbstractCegarLoop]: === Iteration 55 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:05,100 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:05,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1918633863, now seen corresponding path program 52 times [2018-10-04 12:59:05,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:05,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:05,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:05,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:05,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:05,609 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:05,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:05,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:05,651 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:05,675 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:05,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:05,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:05,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:05,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:59:05,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:59:05,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:59:05,786 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:05,786 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2018-10-04 12:59:06,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:06,257 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-10-04 12:59:06,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:59:06,258 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2018-10-04 12:59:06,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:06,259 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:59:06,259 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 12:59:06,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 19 [2018-10-04 12:59:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 12:59:06,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2018-10-04 12:59:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 12:59:06,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-10-04 12:59:06,262 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2018-10-04 12:59:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:06,262 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-10-04 12:59:06,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:59:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-10-04 12:59:06,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:59:06,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:06,263 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-04 12:59:06,263 INFO L423 AbstractCegarLoop]: === Iteration 56 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:06,263 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:06,263 INFO L82 PathProgramCache]: Analyzing trace with hash -651953913, now seen corresponding path program 53 times [2018-10-04 12:59:06,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:06,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:06,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:06,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:06,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:06,612 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:06,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:06,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:06,649 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:06,681 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-10-04 12:59:06,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:06,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:06,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:06,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:59:06,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:59:06,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:59:06,768 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:06,768 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 22 states. [2018-10-04 12:59:06,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:06,910 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2018-10-04 12:59:06,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:59:06,910 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 12:59:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:06,911 INFO L225 Difference]: With dead ends: 66 [2018-10-04 12:59:06,911 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:59:06,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 6 [2018-10-04 12:59:06,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:59:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:59:06,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:59:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-04 12:59:06,914 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 42 [2018-10-04 12:59:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:06,915 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-04 12:59:06,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:59:06,915 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-04 12:59:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:59:06,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:06,915 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1] [2018-10-04 12:59:06,915 INFO L423 AbstractCegarLoop]: === Iteration 57 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:06,915 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:06,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2101809875, now seen corresponding path program 54 times [2018-10-04 12:59:06,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:06,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:06,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:06,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:06,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:07,474 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:07,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:07,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:07,512 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:07,539 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-04 12:59:07,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:07,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:07,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:07,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:59:07,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:59:07,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:59:07,728 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:07,728 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-10-04 12:59:07,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:07,794 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-10-04 12:59:07,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:59:07,795 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-04 12:59:07,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:07,795 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:59:07,795 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 12:59:07,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 7 [2018-10-04 12:59:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 12:59:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 12:59:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 12:59:07,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-10-04 12:59:07,800 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 42 [2018-10-04 12:59:07,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:07,800 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-10-04 12:59:07,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:59:07,800 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-10-04 12:59:07,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 12:59:07,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:07,801 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1] [2018-10-04 12:59:07,801 INFO L423 AbstractCegarLoop]: === Iteration 58 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:07,801 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:07,801 INFO L82 PathProgramCache]: Analyzing trace with hash -731658207, now seen corresponding path program 55 times [2018-10-04 12:59:07,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:07,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:07,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:07,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:07,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:08,347 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:08,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:08,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:08,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:08,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:08,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:08,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:59:08,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:59:08,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:59:08,646 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:08,647 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 22 states. [2018-10-04 12:59:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:09,177 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-04 12:59:09,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:59:09,183 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2018-10-04 12:59:09,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:09,183 INFO L225 Difference]: With dead ends: 68 [2018-10-04 12:59:09,183 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:59:09,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 20 [2018-10-04 12:59:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:59:09,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2018-10-04 12:59:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 12:59:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-04 12:59:09,187 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2018-10-04 12:59:09,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:09,187 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-04 12:59:09,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:59:09,187 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-04 12:59:09,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:59:09,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:09,187 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-04 12:59:09,188 INFO L423 AbstractCegarLoop]: === Iteration 59 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:09,188 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:09,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1206629459, now seen corresponding path program 56 times [2018-10-04 12:59:09,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:09,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:09,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:09,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:09,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:09,590 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:09,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:09,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:09,655 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:09,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:09,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:09,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:09,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:09,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:59:09,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:59:09,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:59:09,809 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:09,810 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 23 states. [2018-10-04 12:59:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:09,972 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-10-04 12:59:09,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:59:09,972 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-04 12:59:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:09,973 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:59:09,973 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:59:09,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 7 [2018-10-04 12:59:09,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:59:09,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:59:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:59:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-04 12:59:09,978 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2018-10-04 12:59:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:09,978 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-04 12:59:09,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:59:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-04 12:59:09,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:59:09,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:09,979 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1] [2018-10-04 12:59:09,979 INFO L423 AbstractCegarLoop]: === Iteration 60 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:09,979 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:09,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1092475975, now seen corresponding path program 57 times [2018-10-04 12:59:09,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:09,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:09,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:09,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:09,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:10,136 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:10,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:10,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:10,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:10,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 12:59:10,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:10,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:10,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:10,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:59:10,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:59:10,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:59:10,317 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:10,317 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 23 states. [2018-10-04 12:59:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:10,393 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-04 12:59:10,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:59:10,393 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-04 12:59:10,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:10,394 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:59:10,394 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 12:59:10,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 8 [2018-10-04 12:59:10,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 12:59:10,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 12:59:10,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 12:59:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-04 12:59:10,398 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2018-10-04 12:59:10,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:10,399 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-04 12:59:10,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:59:10,399 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-04 12:59:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 12:59:10,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:10,399 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1] [2018-10-04 12:59:10,400 INFO L423 AbstractCegarLoop]: === Iteration 61 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:10,400 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:10,400 INFO L82 PathProgramCache]: Analyzing trace with hash -493044665, now seen corresponding path program 58 times [2018-10-04 12:59:10,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:10,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:10,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:10,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:10,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:10,724 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:10,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:10,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:10,898 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:10,925 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:10,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:10,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:11,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:11,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:59:11,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:59:11,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:59:11,074 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:11,074 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 23 states. [2018-10-04 12:59:11,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:11,655 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-10-04 12:59:11,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:59:11,656 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2018-10-04 12:59:11,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:11,656 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:59:11,657 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:59:11,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 21 [2018-10-04 12:59:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:59:11,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2018-10-04 12:59:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 12:59:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-10-04 12:59:11,662 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2018-10-04 12:59:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:11,662 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-10-04 12:59:11,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:59:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-10-04 12:59:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:59:11,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:11,663 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-04 12:59:11,663 INFO L423 AbstractCegarLoop]: === Iteration 62 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:11,663 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:11,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1895423047, now seen corresponding path program 59 times [2018-10-04 12:59:11,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:11,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:11,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:11,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:11,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:11,924 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:12,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:12,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:12,022 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:12,066 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 12:59:12,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:12,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:12,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:12,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:59:12,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:59:12,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:59:12,175 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:12,175 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2018-10-04 12:59:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:12,315 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2018-10-04 12:59:12,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:59:12,316 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 12:59:12,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:12,316 INFO L225 Difference]: With dead ends: 72 [2018-10-04 12:59:12,316 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:59:12,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 8 [2018-10-04 12:59:12,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:59:12,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:59:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:59:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-04 12:59:12,321 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 46 [2018-10-04 12:59:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:12,321 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-04 12:59:12,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:59:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-04 12:59:12,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:59:12,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:12,321 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1] [2018-10-04 12:59:12,322 INFO L423 AbstractCegarLoop]: === Iteration 63 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:12,322 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:12,322 INFO L82 PathProgramCache]: Analyzing trace with hash 153247469, now seen corresponding path program 60 times [2018-10-04 12:59:12,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:12,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:12,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:12,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:12,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:12,658 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:12,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:12,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:12,715 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:12,893 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-04 12:59:12,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:12,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:13,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:13,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:59:13,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:59:13,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:59:13,190 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:13,190 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-10-04 12:59:13,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:13,261 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-10-04 12:59:13,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:59:13,261 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-04 12:59:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:13,262 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:59:13,262 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 12:59:13,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.1s impTime 9 [2018-10-04 12:59:13,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 12:59:13,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 12:59:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 12:59:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-04 12:59:13,265 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2018-10-04 12:59:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:13,266 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-04 12:59:13,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:59:13,266 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-04 12:59:13,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 12:59:13,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:13,266 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1] [2018-10-04 12:59:13,266 INFO L423 AbstractCegarLoop]: === Iteration 64 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:13,266 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:13,267 INFO L82 PathProgramCache]: Analyzing trace with hash 455642721, now seen corresponding path program 61 times [2018-10-04 12:59:13,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:13,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:13,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:13,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:13,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:13,629 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:13,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:13,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:13,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:13,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:14,043 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:14,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:14,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:59:14,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:59:14,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:59:14,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:14,064 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 24 states. [2018-10-04 12:59:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:14,709 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-04 12:59:14,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:59:14,710 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2018-10-04 12:59:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:14,711 INFO L225 Difference]: With dead ends: 74 [2018-10-04 12:59:14,711 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:59:14,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 22 [2018-10-04 12:59:14,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:59:14,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-10-04 12:59:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 12:59:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-04 12:59:14,716 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2018-10-04 12:59:14,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:14,716 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-04 12:59:14,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:59:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-04 12:59:14,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:59:14,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:14,717 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-04 12:59:14,717 INFO L423 AbstractCegarLoop]: === Iteration 65 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:14,717 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:14,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1239960941, now seen corresponding path program 62 times [2018-10-04 12:59:14,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:14,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:14,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:14,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:14,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:15,522 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:15,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:15,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:15,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:15,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:15,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:15,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:15,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:15,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:59:15,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:59:15,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:59:15,757 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:15,757 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2018-10-04 12:59:15,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:15,937 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-10-04 12:59:15,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:59:15,937 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-04 12:59:15,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:15,938 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:59:15,938 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:59:15,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 9 [2018-10-04 12:59:15,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:59:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:59:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:59:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-04 12:59:15,943 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2018-10-04 12:59:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:15,943 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-04 12:59:15,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:59:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-04 12:59:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:59:15,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:15,944 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1] [2018-10-04 12:59:15,944 INFO L423 AbstractCegarLoop]: === Iteration 66 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:15,944 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:15,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1227874425, now seen corresponding path program 63 times [2018-10-04 12:59:15,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:15,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:15,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:15,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:15,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:16,372 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:16,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:16,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:16,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:16,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 12:59:16,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:16,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:16,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:16,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:59:16,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:59:16,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:59:16,608 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:16,608 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 25 states. [2018-10-04 12:59:16,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:16,692 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-04 12:59:16,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:59:16,693 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-04 12:59:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:16,694 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:59:16,694 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 12:59:16,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 10 [2018-10-04 12:59:16,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 12:59:16,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 12:59:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 12:59:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-10-04 12:59:16,698 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2018-10-04 12:59:16,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:16,698 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-10-04 12:59:16,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:59:16,699 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-10-04 12:59:16,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 12:59:16,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:16,699 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1] [2018-10-04 12:59:16,699 INFO L423 AbstractCegarLoop]: === Iteration 67 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:16,699 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:16,700 INFO L82 PathProgramCache]: Analyzing trace with hash 590536967, now seen corresponding path program 64 times [2018-10-04 12:59:16,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:16,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:16,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:16,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:16,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:17,014 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:17,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:17,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:17,167 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:17,192 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:17,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:17,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:17,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:17,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:59:17,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:59:17,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:59:17,304 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:17,304 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 25 states. [2018-10-04 12:59:17,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:17,992 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-10-04 12:59:17,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:59:17,993 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2018-10-04 12:59:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:17,994 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:59:17,994 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 12:59:17,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 23 [2018-10-04 12:59:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 12:59:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2018-10-04 12:59:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 12:59:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-04 12:59:17,997 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2018-10-04 12:59:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:17,997 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-04 12:59:17,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:59:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-04 12:59:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:59:17,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:17,998 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-04 12:59:17,998 INFO L423 AbstractCegarLoop]: === Iteration 68 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:17,998 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:17,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1126715271, now seen corresponding path program 65 times [2018-10-04 12:59:17,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:17,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:17,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:17,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:17,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:18,947 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:19,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:19,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:19,036 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:19,067 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 12:59:19,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:19,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:19,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:19,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:59:19,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:59:19,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:59:19,167 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:19,167 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-04 12:59:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:19,335 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2018-10-04 12:59:19,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:59:19,336 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 12:59:19,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:19,336 INFO L225 Difference]: With dead ends: 78 [2018-10-04 12:59:19,337 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:59:19,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 10 [2018-10-04 12:59:19,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:59:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:59:19,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:59:19,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-04 12:59:19,341 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 50 [2018-10-04 12:59:19,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:19,341 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-04 12:59:19,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:59:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-04 12:59:19,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:59:19,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:19,341 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1] [2018-10-04 12:59:19,342 INFO L423 AbstractCegarLoop]: === Iteration 69 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:19,342 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:19,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1933230253, now seen corresponding path program 66 times [2018-10-04 12:59:19,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:19,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:19,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:19,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:19,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:19,538 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:19,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:19,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:19,634 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:19,671 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:59:19,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:19,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:19,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:19,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:59:19,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:59:19,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:59:19,786 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:19,786 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-10-04 12:59:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:19,929 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-04 12:59:19,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:59:19,929 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-04 12:59:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:19,930 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:59:19,930 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 12:59:19,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 11 [2018-10-04 12:59:19,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 12:59:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 12:59:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 12:59:19,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-10-04 12:59:19,934 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2018-10-04 12:59:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:19,935 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-10-04 12:59:19,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:59:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-10-04 12:59:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 12:59:19,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:19,935 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1] [2018-10-04 12:59:19,935 INFO L423 AbstractCegarLoop]: === Iteration 70 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:19,935 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:19,936 INFO L82 PathProgramCache]: Analyzing trace with hash -199465823, now seen corresponding path program 67 times [2018-10-04 12:59:19,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:19,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:19,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:19,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:19,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:20,212 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:20,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:20,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:20,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:20,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:20,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:20,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:59:20,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:59:20,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:59:20,553 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:20,553 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 26 states. [2018-10-04 12:59:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:21,303 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-04 12:59:21,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:59:21,304 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-04 12:59:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:21,304 INFO L225 Difference]: With dead ends: 80 [2018-10-04 12:59:21,305 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:59:21,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 24 [2018-10-04 12:59:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:59:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2018-10-04 12:59:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 12:59:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-10-04 12:59:21,309 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2018-10-04 12:59:21,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:21,310 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-10-04 12:59:21,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:59:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-10-04 12:59:21,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:59:21,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:21,310 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-04 12:59:21,311 INFO L423 AbstractCegarLoop]: === Iteration 71 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:21,311 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:21,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1888534739, now seen corresponding path program 68 times [2018-10-04 12:59:21,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:21,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:21,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:21,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:21,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:21,570 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:21,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:21,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:21,723 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:21,754 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:21,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:21,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:21,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:21,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:59:21,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:59:21,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:59:21,869 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:21,869 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 27 states. [2018-10-04 12:59:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:22,074 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-04 12:59:22,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:59:22,074 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-04 12:59:22,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:22,075 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:59:22,075 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:59:22,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 11 [2018-10-04 12:59:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:59:22,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:59:22,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:59:22,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-04 12:59:22,080 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2018-10-04 12:59:22,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:22,080 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-04 12:59:22,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:59:22,080 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-04 12:59:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:59:22,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:22,081 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1] [2018-10-04 12:59:22,081 INFO L423 AbstractCegarLoop]: === Iteration 72 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:22,081 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:22,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1638593223, now seen corresponding path program 69 times [2018-10-04 12:59:22,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:22,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:22,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:22,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:22,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:22,250 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:22,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:22,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:22,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:22,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-04 12:59:22,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:22,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:22,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:22,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:59:22,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:59:22,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:59:22,518 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:22,519 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 27 states. [2018-10-04 12:59:22,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:22,597 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-04 12:59:22,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:59:22,598 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-04 12:59:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:22,598 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:59:22,599 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 12:59:22,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 11 [2018-10-04 12:59:22,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 12:59:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 12:59:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 12:59:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-04 12:59:22,603 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2018-10-04 12:59:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:22,603 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-04 12:59:22,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:59:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-04 12:59:22,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 12:59:22,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:22,604 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1] [2018-10-04 12:59:22,604 INFO L423 AbstractCegarLoop]: === Iteration 73 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:22,604 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:22,604 INFO L82 PathProgramCache]: Analyzing trace with hash -743279161, now seen corresponding path program 70 times [2018-10-04 12:59:22,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:22,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:22,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:22,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:22,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:23,135 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:23,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:23,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:23,381 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:23,412 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:23,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:23,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:23,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:23,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:59:23,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:59:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:59:23,533 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:23,533 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 27 states. [2018-10-04 12:59:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:24,527 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2018-10-04 12:59:24,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:59:24,527 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2018-10-04 12:59:24,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:24,528 INFO L225 Difference]: With dead ends: 83 [2018-10-04 12:59:24,528 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 12:59:24,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 25 [2018-10-04 12:59:24,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 12:59:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2018-10-04 12:59:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:59:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-04 12:59:24,533 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2018-10-04 12:59:24,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:24,534 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-04 12:59:24,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:59:24,534 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-04 12:59:24,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:59:24,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:24,534 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-04 12:59:24,535 INFO L423 AbstractCegarLoop]: === Iteration 74 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:24,535 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:24,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1566879033, now seen corresponding path program 71 times [2018-10-04 12:59:24,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:24,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:24,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:24,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:24,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:24,876 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:25,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:25,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:25,101 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:25,137 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-04 12:59:25,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:25,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:25,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:25,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:59:25,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:59:25,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:59:25,434 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:25,434 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 28 states. [2018-10-04 12:59:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:25,652 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-10-04 12:59:25,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:59:25,653 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 12:59:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:25,654 INFO L225 Difference]: With dead ends: 84 [2018-10-04 12:59:25,654 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:59:25,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.2s impTime 12 [2018-10-04 12:59:25,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:59:25,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:59:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:59:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-04 12:59:25,659 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 54 [2018-10-04 12:59:25,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:25,659 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-04 12:59:25,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:59:25,659 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-04 12:59:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:59:25,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:25,660 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1] [2018-10-04 12:59:25,660 INFO L423 AbstractCegarLoop]: === Iteration 75 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:25,660 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:25,660 INFO L82 PathProgramCache]: Analyzing trace with hash 399905389, now seen corresponding path program 72 times [2018-10-04 12:59:25,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:25,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:25,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:25,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:25,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:25,869 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:25,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:25,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:25,956 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:25,993 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-04 12:59:25,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:25,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:26,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:26,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:59:26,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:59:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:59:26,264 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:26,264 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-10-04 12:59:26,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:26,381 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-10-04 12:59:26,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:59:26,381 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-04 12:59:26,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:26,382 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:59:26,382 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 12:59:26,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 13 [2018-10-04 12:59:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 12:59:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 12:59:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:59:26,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-10-04 12:59:26,387 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 54 [2018-10-04 12:59:26,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:26,388 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-10-04 12:59:26,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:59:26,388 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-10-04 12:59:26,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 12:59:26,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:26,388 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1] [2018-10-04 12:59:26,388 INFO L423 AbstractCegarLoop]: === Iteration 76 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:26,389 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:26,389 INFO L82 PathProgramCache]: Analyzing trace with hash -487896351, now seen corresponding path program 73 times [2018-10-04 12:59:26,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:26,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:26,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:26,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:26,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:26,742 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:26,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:26,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:26,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:27,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:27,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:27,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:59:27,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:59:27,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:59:27,149 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:27,149 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2018-10-04 12:59:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:28,025 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-04 12:59:28,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:59:28,025 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2018-10-04 12:59:28,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:28,026 INFO L225 Difference]: With dead ends: 86 [2018-10-04 12:59:28,026 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:59:28,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 26 [2018-10-04 12:59:28,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:59:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 58. [2018-10-04 12:59:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 12:59:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2018-10-04 12:59:28,031 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2018-10-04 12:59:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:28,031 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2018-10-04 12:59:28,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:59:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2018-10-04 12:59:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:59:28,032 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:28,032 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-04 12:59:28,032 INFO L423 AbstractCegarLoop]: === Iteration 77 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:28,032 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:28,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2055020781, now seen corresponding path program 74 times [2018-10-04 12:59:28,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:28,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:28,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:28,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:28,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:28,318 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:28,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:28,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:28,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:28,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:28,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:28,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:29,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:29,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:59:29,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:59:29,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:59:29,764 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:29,764 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2018-10-04 12:59:30,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:30,017 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-10-04 12:59:30,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:59:30,017 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-04 12:59:30,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:30,018 INFO L225 Difference]: With dead ends: 87 [2018-10-04 12:59:30,018 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 12:59:30,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 0.3s impTime 13 [2018-10-04 12:59:30,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 12:59:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 12:59:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 12:59:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-04 12:59:30,023 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 56 [2018-10-04 12:59:30,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:30,023 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-04 12:59:30,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:59:30,023 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-04 12:59:30,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:59:30,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:30,024 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1] [2018-10-04 12:59:30,024 INFO L423 AbstractCegarLoop]: === Iteration 78 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:30,024 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:30,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1399171577, now seen corresponding path program 75 times [2018-10-04 12:59:30,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:30,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:30,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:30,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:30,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:31,218 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:31,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:31,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:31,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:31,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2018-10-04 12:59:31,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:31,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:31,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:31,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:59:31,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:59:31,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:59:31,496 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:31,497 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 29 states. [2018-10-04 12:59:32,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:32,266 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-04 12:59:32,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:59:32,267 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-04 12:59:32,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:32,267 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:59:32,267 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 12:59:32,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 14 [2018-10-04 12:59:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 12:59:32,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 12:59:32,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 12:59:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-10-04 12:59:32,271 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2018-10-04 12:59:32,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:32,272 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-10-04 12:59:32,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:59:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-10-04 12:59:32,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 12:59:32,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:32,272 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1] [2018-10-04 12:59:32,273 INFO L423 AbstractCegarLoop]: === Iteration 79 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:32,273 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:32,273 INFO L82 PathProgramCache]: Analyzing trace with hash -424707449, now seen corresponding path program 76 times [2018-10-04 12:59:32,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:32,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:32,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:32,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:32,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:32,715 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:32,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:32,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:32,994 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:33,030 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:33,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:33,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:33,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:33,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:59:33,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:59:33,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:59:33,155 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:33,155 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 29 states. [2018-10-04 12:59:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:34,208 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-10-04 12:59:34,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:59:34,209 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2018-10-04 12:59:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:34,210 INFO L225 Difference]: With dead ends: 89 [2018-10-04 12:59:34,210 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 12:59:34,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 27 [2018-10-04 12:59:34,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 12:59:34,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2018-10-04 12:59:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 12:59:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-10-04 12:59:34,215 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2018-10-04 12:59:34,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:34,215 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-10-04 12:59:34,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:59:34,216 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-10-04 12:59:34,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:59:34,216 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:34,216 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-04 12:59:34,216 INFO L423 AbstractCegarLoop]: === Iteration 80 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:34,216 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:34,217 INFO L82 PathProgramCache]: Analyzing trace with hash -281090553, now seen corresponding path program 77 times [2018-10-04 12:59:34,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:34,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:34,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:34,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:34,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:35,100 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:35,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:35,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:35,259 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:35,299 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-10-04 12:59:35,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:35,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:35,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:35,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:59:35,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:59:35,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:59:35,412 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:35,412 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 30 states. [2018-10-04 12:59:35,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:35,588 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2018-10-04 12:59:35,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:59:35,589 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 12:59:35,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:35,590 INFO L225 Difference]: With dead ends: 90 [2018-10-04 12:59:35,590 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:59:35,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 14 [2018-10-04 12:59:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:59:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:59:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:59:35,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-04 12:59:35,596 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 58 [2018-10-04 12:59:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:35,597 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-04 12:59:35,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:59:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-04 12:59:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:59:35,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:35,597 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1] [2018-10-04 12:59:35,598 INFO L423 AbstractCegarLoop]: === Iteration 81 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:35,598 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:35,598 INFO L82 PathProgramCache]: Analyzing trace with hash 13128749, now seen corresponding path program 78 times [2018-10-04 12:59:35,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:35,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:35,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:35,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:35,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:35,755 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:35,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:35,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:35,893 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:35,933 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-04 12:59:35,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:35,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:36,061 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:36,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:59:36,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:59:36,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:59:36,061 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:36,062 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-10-04 12:59:36,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:36,150 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-10-04 12:59:36,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:59:36,151 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-04 12:59:36,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:36,151 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:59:36,152 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 12:59:36,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 15 [2018-10-04 12:59:36,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 12:59:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 12:59:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 12:59:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-04 12:59:36,157 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 58 [2018-10-04 12:59:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:36,157 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-04 12:59:36,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:59:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-04 12:59:36,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 12:59:36,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:36,158 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1] [2018-10-04 12:59:36,158 INFO L423 AbstractCegarLoop]: === Iteration 82 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:36,159 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:36,159 INFO L82 PathProgramCache]: Analyzing trace with hash 406929697, now seen corresponding path program 79 times [2018-10-04 12:59:36,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:36,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:36,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:36,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:36,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:36,473 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:36,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:36,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:36,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:36,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:36,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:36,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:59:36,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:59:36,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:59:36,961 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:36,961 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 30 states. [2018-10-04 12:59:38,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:38,127 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-04 12:59:38,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:59:38,128 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2018-10-04 12:59:38,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:38,129 INFO L225 Difference]: With dead ends: 92 [2018-10-04 12:59:38,129 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 12:59:38,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 28 [2018-10-04 12:59:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 12:59:38,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-10-04 12:59:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 12:59:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2018-10-04 12:59:38,135 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2018-10-04 12:59:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:38,135 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2018-10-04 12:59:38,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:59:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2018-10-04 12:59:38,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:59:38,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:38,136 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-04 12:59:38,136 INFO L423 AbstractCegarLoop]: === Iteration 83 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:38,136 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:38,136 INFO L82 PathProgramCache]: Analyzing trace with hash -270142803, now seen corresponding path program 80 times [2018-10-04 12:59:38,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:38,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:38,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:38,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:38,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:38,302 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:38,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:38,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:38,536 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:38,573 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:38,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:38,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:38,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:38,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:59:38,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:59:38,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:59:38,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:38,760 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 31 states. [2018-10-04 12:59:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:39,087 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-10-04 12:59:39,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:59:39,087 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-04 12:59:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:39,088 INFO L225 Difference]: With dead ends: 93 [2018-10-04 12:59:39,088 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:59:39,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 15 [2018-10-04 12:59:39,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:59:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:59:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:59:39,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-04 12:59:39,094 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2018-10-04 12:59:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:39,094 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-04 12:59:39,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:59:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-04 12:59:39,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:59:39,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:39,095 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1] [2018-10-04 12:59:39,095 INFO L423 AbstractCegarLoop]: === Iteration 84 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:39,095 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:39,095 INFO L82 PathProgramCache]: Analyzing trace with hash 260720967, now seen corresponding path program 81 times [2018-10-04 12:59:39,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:39,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:39,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:39,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:39,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:39,357 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:39,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:39,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:39,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:39,516 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:59:39,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:39,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:39,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:39,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:59:39,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:59:39,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:59:39,657 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:39,657 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 31 states. [2018-10-04 12:59:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:39,777 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-04 12:59:39,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:59:39,777 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-04 12:59:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:39,778 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:59:39,778 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 12:59:39,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 16 [2018-10-04 12:59:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 12:59:39,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 12:59:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 12:59:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-10-04 12:59:39,782 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2018-10-04 12:59:39,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:39,782 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-10-04 12:59:39,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:59:39,782 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-10-04 12:59:39,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 12:59:39,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:39,783 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1] [2018-10-04 12:59:39,783 INFO L423 AbstractCegarLoop]: === Iteration 85 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:39,783 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:39,783 INFO L82 PathProgramCache]: Analyzing trace with hash -507646137, now seen corresponding path program 82 times [2018-10-04 12:59:39,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:39,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:39,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:39,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:39,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:40,143 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:40,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:40,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-04 12:59:40,487 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:40,531 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:40,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:40,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:40,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:40,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:59:40,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:59:40,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:59:40,699 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:40,699 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 31 states. [2018-10-04 12:59:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:41,781 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2018-10-04 12:59:41,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:59:41,781 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2018-10-04 12:59:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:41,782 INFO L225 Difference]: With dead ends: 95 [2018-10-04 12:59:41,783 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 12:59:41,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 29 [2018-10-04 12:59:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 12:59:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2018-10-04 12:59:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 12:59:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2018-10-04 12:59:41,792 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2018-10-04 12:59:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:41,792 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2018-10-04 12:59:41,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:59:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2018-10-04 12:59:41,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:59:41,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:41,793 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-04 12:59:41,793 INFO L423 AbstractCegarLoop]: === Iteration 86 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:41,793 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:41,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1442777415, now seen corresponding path program 83 times [2018-10-04 12:59:41,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:41,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:41,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:41,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:41,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:42,650 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:42,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:42,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:42,835 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:42,881 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 12:59:42,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:42,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:43,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:43,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:59:43,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:59:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:59:43,045 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:43,045 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2018-10-04 12:59:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:43,236 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2018-10-04 12:59:43,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:59:43,236 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 12:59:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:43,237 INFO L225 Difference]: With dead ends: 96 [2018-10-04 12:59:43,237 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:59:43,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 16 [2018-10-04 12:59:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:59:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 12:59:43,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:59:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-04 12:59:43,243 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 62 [2018-10-04 12:59:43,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:43,243 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-04 12:59:43,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:59:43,244 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-04 12:59:43,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:59:43,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:43,244 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1] [2018-10-04 12:59:43,245 INFO L423 AbstractCegarLoop]: === Iteration 87 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:43,245 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:43,245 INFO L82 PathProgramCache]: Analyzing trace with hash 719685101, now seen corresponding path program 84 times [2018-10-04 12:59:43,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:43,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:43,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:43,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:43,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:43,740 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:44,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:44,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:44,102 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:44,155 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 12:59:44,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:44,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:44,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:44,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:59:44,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:59:44,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:59:44,357 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:44,357 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-10-04 12:59:44,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:44,481 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-04 12:59:44,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:59:44,481 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-04 12:59:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:44,482 INFO L225 Difference]: With dead ends: 67 [2018-10-04 12:59:44,482 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 12:59:44,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.3s impTime 16 [2018-10-04 12:59:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 12:59:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 12:59:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 12:59:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-10-04 12:59:44,488 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 62 [2018-10-04 12:59:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:44,488 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-10-04 12:59:44,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:59:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-10-04 12:59:44,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 12:59:44,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:44,489 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1] [2018-10-04 12:59:44,489 INFO L423 AbstractCegarLoop]: === Iteration 88 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:44,489 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:44,490 INFO L82 PathProgramCache]: Analyzing trace with hash 835340129, now seen corresponding path program 85 times [2018-10-04 12:59:44,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:44,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:44,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:44,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:44,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:44,953 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:45,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:45,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:45,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:45,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:45,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:45,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:59:45,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:59:45,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:59:45,520 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:45,520 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 32 states. [2018-10-04 12:59:46,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:46,693 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-04 12:59:46,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:59:46,693 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2018-10-04 12:59:46,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:46,694 INFO L225 Difference]: With dead ends: 98 [2018-10-04 12:59:46,694 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 12:59:46,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 30 [2018-10-04 12:59:46,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 12:59:46,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2018-10-04 12:59:46,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 12:59:46,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-04 12:59:46,702 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2018-10-04 12:59:46,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:46,702 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-04 12:59:46,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:59:46,702 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-04 12:59:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:59:46,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:46,703 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-04 12:59:46,703 INFO L423 AbstractCegarLoop]: === Iteration 89 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:46,703 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:46,704 INFO L82 PathProgramCache]: Analyzing trace with hash 125678701, now seen corresponding path program 86 times [2018-10-04 12:59:46,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:46,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:46,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:46,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:46,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:46,958 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:47,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:47,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:47,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:47,302 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:47,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:47,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:47,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:47,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:59:47,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:59:47,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:59:47,462 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:47,462 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2018-10-04 12:59:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:47,812 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-10-04 12:59:47,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:59:47,812 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-04 12:59:47,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:47,813 INFO L225 Difference]: With dead ends: 99 [2018-10-04 12:59:47,813 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:59:47,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 17 [2018-10-04 12:59:47,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:59:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:59:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:59:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-04 12:59:47,818 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 64 [2018-10-04 12:59:47,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:47,818 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-04 12:59:47,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:59:47,818 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-04 12:59:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:59:47,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:47,819 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1] [2018-10-04 12:59:47,819 INFO L423 AbstractCegarLoop]: === Iteration 90 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:47,819 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:47,819 INFO L82 PathProgramCache]: Analyzing trace with hash -815346553, now seen corresponding path program 87 times [2018-10-04 12:59:47,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:47,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:47,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:47,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:47,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:47,946 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:48,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:48,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:48,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:48,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 12:59:48,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:48,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:48,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:48,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:59:48,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:59:48,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:59:48,317 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:48,318 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 33 states. [2018-10-04 12:59:48,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:48,415 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-04 12:59:48,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:59:48,416 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-04 12:59:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:48,416 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:59:48,416 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 12:59:48,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 18 [2018-10-04 12:59:48,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 12:59:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 12:59:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 12:59:48,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-04 12:59:48,421 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2018-10-04 12:59:48,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:48,421 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-04 12:59:48,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:59:48,422 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-04 12:59:48,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 12:59:48,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:48,422 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1] [2018-10-04 12:59:48,422 INFO L423 AbstractCegarLoop]: === Iteration 91 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:48,422 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:48,422 INFO L82 PathProgramCache]: Analyzing trace with hash 493999111, now seen corresponding path program 88 times [2018-10-04 12:59:48,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:48,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:48,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:48,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:48,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:48,720 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:49,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:49,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:49,140 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:49,181 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:49,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:49,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:49,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:49,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:59:49,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:59:49,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:59:49,460 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:49,460 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 33 states. [2018-10-04 12:59:50,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:50,734 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-04 12:59:50,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:59:50,734 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2018-10-04 12:59:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:50,736 INFO L225 Difference]: With dead ends: 101 [2018-10-04 12:59:50,736 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 12:59:50,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 31 [2018-10-04 12:59:50,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 12:59:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2018-10-04 12:59:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 12:59:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2018-10-04 12:59:50,741 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2018-10-04 12:59:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:50,741 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2018-10-04 12:59:50,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:59:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2018-10-04 12:59:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:59:50,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:50,742 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-04 12:59:50,742 INFO L423 AbstractCegarLoop]: === Iteration 92 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:50,743 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:50,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1865958265, now seen corresponding path program 89 times [2018-10-04 12:59:50,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:50,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:50,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:50,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:50,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:50,981 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:51,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:51,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:51,315 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:51,363 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-10-04 12:59:51,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:51,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:51,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:51,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:59:51,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:59:51,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:59:51,654 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:51,654 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 34 states. [2018-10-04 12:59:51,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:51,988 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-10-04 12:59:51,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:59:51,989 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 12:59:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:51,990 INFO L225 Difference]: With dead ends: 102 [2018-10-04 12:59:51,990 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:59:51,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 18 [2018-10-04 12:59:51,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:59:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:59:51,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:59:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-04 12:59:51,993 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 66 [2018-10-04 12:59:51,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:51,994 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-04 12:59:51,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:59:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-04 12:59:51,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:59:51,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:51,994 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1] [2018-10-04 12:59:51,994 INFO L423 AbstractCegarLoop]: === Iteration 93 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:51,994 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:51,995 INFO L82 PathProgramCache]: Analyzing trace with hash -972970067, now seen corresponding path program 90 times [2018-10-04 12:59:51,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:51,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:51,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:51,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:51,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:52,126 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:52,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:52,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:52,325 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:52,371 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-04 12:59:52,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:52,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:52,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:52,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:59:52,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:59:52,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:59:52,532 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:52,533 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-10-04 12:59:52,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:52,630 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-10-04 12:59:52,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:59:52,631 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-04 12:59:52,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:52,632 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:59:52,632 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:59:52,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 19 [2018-10-04 12:59:52,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:59:52,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 12:59:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 12:59:52,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-10-04 12:59:52,636 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 66 [2018-10-04 12:59:52,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:52,636 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-10-04 12:59:52,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:59:52,636 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-10-04 12:59:52,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 12:59:52,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:52,636 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1] [2018-10-04 12:59:52,637 INFO L423 AbstractCegarLoop]: === Iteration 94 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:52,637 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:52,637 INFO L82 PathProgramCache]: Analyzing trace with hash -97362527, now seen corresponding path program 91 times [2018-10-04 12:59:52,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:52,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:52,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:52,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:52,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:52,975 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:53,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:53,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:53,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:53,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:53,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:53,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:59:53,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:59:53,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:59:53,730 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:53,730 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 34 states. [2018-10-04 12:59:55,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:55,168 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-04 12:59:55,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:59:55,168 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2018-10-04 12:59:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:55,169 INFO L225 Difference]: With dead ends: 104 [2018-10-04 12:59:55,169 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 12:59:55,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 32 [2018-10-04 12:59:55,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 12:59:55,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-10-04 12:59:55,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 12:59:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-04 12:59:55,175 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2018-10-04 12:59:55,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:55,175 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-04 12:59:55,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:59:55,175 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-04 12:59:55,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:59:55,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:55,176 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-04 12:59:55,176 INFO L423 AbstractCegarLoop]: === Iteration 95 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:55,176 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:55,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1276667437, now seen corresponding path program 92 times [2018-10-04 12:59:55,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:55,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:55,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:55,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:55,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:55,389 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:55,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:55,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:55,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:55,708 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:55,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:55,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:56,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:56,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:59:56,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:59:56,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:59:56,307 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:56,307 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 35 states. [2018-10-04 12:59:57,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:57,092 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-10-04 12:59:57,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:59:57,092 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-04 12:59:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:57,093 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:59:57,093 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:59:57,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.3s impTime 19 [2018-10-04 12:59:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:59:57,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 12:59:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:59:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-04 12:59:57,097 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2018-10-04 12:59:57,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:57,098 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-04 12:59:57,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:59:57,098 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-04 12:59:57,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:59:57,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:57,099 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1] [2018-10-04 12:59:57,099 INFO L423 AbstractCegarLoop]: === Iteration 96 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:57,099 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:57,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1105469497, now seen corresponding path program 93 times [2018-10-04 12:59:57,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:57,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:57,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:57,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:57,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:57,525 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:57,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:57,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:57,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:58,020 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-04 12:59:58,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:58,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:58,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:58,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:59:58,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:59:58,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:59:58,190 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:58,190 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 35 states. [2018-10-04 12:59:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:58,293 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-04 12:59:58,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:59:58,293 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-04 12:59:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:58,294 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:59:58,294 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 12:59:58,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.4s impTime 20 [2018-10-04 12:59:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 12:59:58,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 12:59:58,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 12:59:58,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-04 12:59:58,299 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2018-10-04 12:59:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:58,299 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-04 12:59:58,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:59:58,300 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-04 12:59:58,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 12:59:58,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:58,300 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1] [2018-10-04 12:59:58,300 INFO L423 AbstractCegarLoop]: === Iteration 97 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:58,300 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:58,300 INFO L82 PathProgramCache]: Analyzing trace with hash 90122439, now seen corresponding path program 94 times [2018-10-04 12:59:58,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:58,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:58,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:58,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:58,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:58,720 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:59,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:59,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:59,240 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:59,283 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:59,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:59,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:59,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:59,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:59:59,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:59:59,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:59:59,575 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:59,575 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 35 states. [2018-10-04 13:00:01,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:01,092 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2018-10-04 13:00:01,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 13:00:01,093 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2018-10-04 13:00:01,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:01,094 INFO L225 Difference]: With dead ends: 107 [2018-10-04 13:00:01,094 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 13:00:01,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 33 [2018-10-04 13:00:01,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 13:00:01,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-10-04 13:00:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 13:00:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-10-04 13:00:01,100 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2018-10-04 13:00:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:01,100 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-10-04 13:00:01,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 13:00:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-10-04 13:00:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 13:00:01,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:01,101 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-04 13:00:01,101 INFO L423 AbstractCegarLoop]: === Iteration 98 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:01,101 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:01,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1501233209, now seen corresponding path program 95 times [2018-10-04 13:00:01,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:01,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:01,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:01,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:01,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:01,347 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:01,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:01,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:01,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:01,695 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:00:01,745 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 13:00:01,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:01,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:01,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:01,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 13:00:01,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 13:00:01,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 13:00:01,888 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:01,888 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 36 states. [2018-10-04 13:00:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:02,229 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-10-04 13:00:02,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 13:00:02,230 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 13:00:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:02,230 INFO L225 Difference]: With dead ends: 108 [2018-10-04 13:00:02,230 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 13:00:02,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 20 [2018-10-04 13:00:02,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 13:00:02,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 13:00:02,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 13:00:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-04 13:00:02,234 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 70 [2018-10-04 13:00:02,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:02,234 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-04 13:00:02,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 13:00:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-04 13:00:02,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 13:00:02,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:02,235 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1] [2018-10-04 13:00:02,235 INFO L423 AbstractCegarLoop]: === Iteration 99 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:02,235 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:02,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1961933165, now seen corresponding path program 96 times [2018-10-04 13:00:02,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:02,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:02,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:02,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:02,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:02,354 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:02,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:02,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:02,588 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:00:02,640 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-04 13:00:02,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:02,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:02,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:02,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 13:00:02,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 13:00:02,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 13:00:02,803 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:02,803 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-10-04 13:00:02,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:02,908 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-10-04 13:00:02,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 13:00:02,908 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-04 13:00:02,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:02,909 INFO L225 Difference]: With dead ends: 75 [2018-10-04 13:00:02,909 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 13:00:02,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 21 [2018-10-04 13:00:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 13:00:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 13:00:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 13:00:02,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-04 13:00:02,915 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 70 [2018-10-04 13:00:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:02,915 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-04 13:00:02,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 13:00:02,916 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-04 13:00:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 13:00:02,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:02,916 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1] [2018-10-04 13:00:02,917 INFO L423 AbstractCegarLoop]: === Iteration 100 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:02,917 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:02,917 INFO L82 PathProgramCache]: Analyzing trace with hash 690324449, now seen corresponding path program 97 times [2018-10-04 13:00:02,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:02,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:02,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:02,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:02,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:03,556 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:04,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:04,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:04,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:04,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:04,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:04,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 13:00:04,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 13:00:04,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 13:00:04,296 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:04,296 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 36 states. [2018-10-04 13:00:05,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:05,874 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-04 13:00:05,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 13:00:05,875 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2018-10-04 13:00:05,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:05,876 INFO L225 Difference]: With dead ends: 110 [2018-10-04 13:00:05,876 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 13:00:05,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 34 [2018-10-04 13:00:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 13:00:05,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 74. [2018-10-04 13:00:05,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 13:00:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2018-10-04 13:00:05,881 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2018-10-04 13:00:05,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:05,881 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2018-10-04 13:00:05,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 13:00:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2018-10-04 13:00:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 13:00:05,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:05,882 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-04 13:00:05,882 INFO L423 AbstractCegarLoop]: === Iteration 101 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:05,882 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:05,883 INFO L82 PathProgramCache]: Analyzing trace with hash -74840083, now seen corresponding path program 98 times [2018-10-04 13:00:05,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:05,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:05,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:05,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:05,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:06,178 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:06,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:06,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:06,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:00:06,630 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:00:06,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:06,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:06,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:06,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 13:00:06,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 13:00:06,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 13:00:06,861 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:06,861 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2018-10-04 13:00:07,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:07,241 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-10-04 13:00:07,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 13:00:07,241 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-04 13:00:07,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:07,242 INFO L225 Difference]: With dead ends: 111 [2018-10-04 13:00:07,242 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 13:00:07,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 21 [2018-10-04 13:00:07,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 13:00:07,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 13:00:07,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 13:00:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-04 13:00:07,246 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 72 [2018-10-04 13:00:07,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:07,246 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-04 13:00:07,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 13:00:07,246 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-04 13:00:07,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 13:00:07,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:07,247 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1] [2018-10-04 13:00:07,247 INFO L423 AbstractCegarLoop]: === Iteration 102 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:07,247 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:07,247 INFO L82 PathProgramCache]: Analyzing trace with hash -90864889, now seen corresponding path program 99 times [2018-10-04 13:00:07,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:07,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:07,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:07,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:07,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:07,403 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:07,635 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:07,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:07,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:07,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:00:07,746 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 13:00:07,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:07,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:07,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:07,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 13:00:07,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 13:00:07,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 13:00:07,952 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:07,952 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 37 states. [2018-10-04 13:00:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:08,064 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-04 13:00:08,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 13:00:08,064 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-04 13:00:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:08,065 INFO L225 Difference]: With dead ends: 77 [2018-10-04 13:00:08,065 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 13:00:08,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 7 [2018-10-04 13:00:08,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 13:00:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 13:00:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 13:00:08,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-10-04 13:00:08,072 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2018-10-04 13:00:08,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:08,072 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-10-04 13:00:08,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 13:00:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-10-04 13:00:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 13:00:08,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:08,073 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1] [2018-10-04 13:00:08,073 INFO L423 AbstractCegarLoop]: === Iteration 103 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:08,073 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:08,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1478094215, now seen corresponding path program 100 times [2018-10-04 13:00:08,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:08,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:08,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:08,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:08,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:08,415 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:08,954 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:09,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:09,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:09,027 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:00:09,073 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:00:09,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:09,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:09,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:09,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 13:00:09,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 13:00:09,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 13:00:09,238 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:09,238 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 37 states. [2018-10-04 13:00:10,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:10,855 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-10-04 13:00:10,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 13:00:10,855 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2018-10-04 13:00:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:10,856 INFO L225 Difference]: With dead ends: 113 [2018-10-04 13:00:10,856 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 13:00:10,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 35 [2018-10-04 13:00:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 13:00:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2018-10-04 13:00:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 13:00:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-04 13:00:10,861 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2018-10-04 13:00:10,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:10,861 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-04 13:00:10,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 13:00:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-04 13:00:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 13:00:10,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:10,862 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-04 13:00:10,862 INFO L423 AbstractCegarLoop]: === Iteration 104 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:10,862 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:10,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1423781113, now seen corresponding path program 101 times [2018-10-04 13:00:10,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:10,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:10,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:10,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:10,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:11,463 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:11,833 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:11,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:11,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:11,893 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:00:11,946 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 13:00:11,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:11,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:12,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:12,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 13:00:12,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 13:00:12,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 13:00:12,336 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:12,336 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 38 states. [2018-10-04 13:00:12,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:12,737 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-10-04 13:00:12,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 13:00:12,738 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 13:00:12,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:12,739 INFO L225 Difference]: With dead ends: 114 [2018-10-04 13:00:12,739 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 13:00:12,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.6s impTime 7 [2018-10-04 13:00:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 13:00:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 13:00:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 13:00:12,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-04 13:00:12,744 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 74 [2018-10-04 13:00:12,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:12,744 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-04 13:00:12,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 13:00:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-04 13:00:12,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 13:00:12,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:12,745 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1] [2018-10-04 13:00:12,745 INFO L423 AbstractCegarLoop]: === Iteration 105 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:12,745 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:12,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1920550099, now seen corresponding path program 102 times [2018-10-04 13:00:12,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:12,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:12,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:12,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:12,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:12,899 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:13,055 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:13,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:13,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:13,119 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:00:13,175 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 13:00:13,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:13,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:13,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:13,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 13:00:13,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 13:00:13,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 13:00:13,331 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:13,332 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-10-04 13:00:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:13,478 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-04 13:00:13,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 13:00:13,478 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-04 13:00:13,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:13,479 INFO L225 Difference]: With dead ends: 79 [2018-10-04 13:00:13,479 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 13:00:13,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 8 [2018-10-04 13:00:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 13:00:13,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 13:00:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 13:00:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-10-04 13:00:13,486 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 74 [2018-10-04 13:00:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:13,486 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-10-04 13:00:13,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 13:00:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-10-04 13:00:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 13:00:13,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:13,487 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1] [2018-10-04 13:00:13,487 INFO L423 AbstractCegarLoop]: === Iteration 106 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:13,487 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:13,487 INFO L82 PathProgramCache]: Analyzing trace with hash 592427553, now seen corresponding path program 103 times [2018-10-04 13:00:13,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:13,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:13,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:13,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:13,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:14,066 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:14,607 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:14,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:14,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:14,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:14,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:14,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:14,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 13:00:14,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 13:00:14,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 13:00:14,963 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:14,963 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 38 states. [2018-10-04 13:00:16,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:16,650 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-04 13:00:16,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 13:00:16,650 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2018-10-04 13:00:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:16,652 INFO L225 Difference]: With dead ends: 116 [2018-10-04 13:00:16,652 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 13:00:16,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 36 [2018-10-04 13:00:16,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 13:00:16,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2018-10-04 13:00:16,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 13:00:16,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-10-04 13:00:16,658 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2018-10-04 13:00:16,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:16,659 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-10-04 13:00:16,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 13:00:16,659 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-10-04 13:00:16,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 13:00:16,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:16,659 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-04 13:00:16,659 INFO L423 AbstractCegarLoop]: === Iteration 107 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:16,659 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:16,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1185323437, now seen corresponding path program 104 times [2018-10-04 13:00:16,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:16,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:16,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:16,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:16,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:16,821 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:17,206 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:17,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:17,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:17,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:00:17,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:00:17,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:17,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:17,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:17,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 13:00:17,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 13:00:17,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 13:00:17,630 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:17,630 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 39 states. [2018-10-04 13:00:18,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:18,054 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2018-10-04 13:00:18,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 13:00:18,054 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-04 13:00:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:18,055 INFO L225 Difference]: With dead ends: 117 [2018-10-04 13:00:18,055 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 13:00:18,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 8 [2018-10-04 13:00:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 13:00:18,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 13:00:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 13:00:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-04 13:00:18,059 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2018-10-04 13:00:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:18,059 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-04 13:00:18,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 13:00:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-04 13:00:18,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 13:00:18,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:18,060 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1] [2018-10-04 13:00:18,060 INFO L423 AbstractCegarLoop]: === Iteration 108 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:18,060 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:18,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1329613241, now seen corresponding path program 105 times [2018-10-04 13:00:18,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:18,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:18,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:18,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:18,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:18,184 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:18,385 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:18,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:18,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:18,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:00:18,532 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-10-04 13:00:18,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:18,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:18,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:18,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 13:00:18,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 13:00:18,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 13:00:18,712 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:18,712 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 39 states. [2018-10-04 13:00:18,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:18,833 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-04 13:00:18,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 13:00:18,833 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-04 13:00:18,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:18,834 INFO L225 Difference]: With dead ends: 81 [2018-10-04 13:00:18,834 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 13:00:18,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 9 [2018-10-04 13:00:18,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 13:00:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 13:00:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 13:00:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-04 13:00:18,840 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2018-10-04 13:00:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:18,840 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-04 13:00:18,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 13:00:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-04 13:00:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 13:00:18,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:18,841 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1] [2018-10-04 13:00:18,841 INFO L423 AbstractCegarLoop]: === Iteration 109 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:18,841 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:18,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1731600967, now seen corresponding path program 106 times [2018-10-04 13:00:18,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:18,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:18,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:18,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:18,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:19,142 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:19,691 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:19,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:19,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:19,848 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:00:19,895 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:00:19,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:19,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:20,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:20,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 13:00:20,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 13:00:20,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 13:00:20,080 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:20,080 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 39 states. [2018-10-04 13:00:21,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:21,847 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2018-10-04 13:00:21,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 13:00:21,847 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2018-10-04 13:00:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:21,848 INFO L225 Difference]: With dead ends: 119 [2018-10-04 13:00:21,848 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 13:00:21,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 37 [2018-10-04 13:00:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 13:00:21,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-10-04 13:00:21,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 13:00:21,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-04 13:00:21,854 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2018-10-04 13:00:21,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:21,854 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-04 13:00:21,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 13:00:21,854 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-04 13:00:21,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 13:00:21,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:21,855 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-04 13:00:21,855 INFO L423 AbstractCegarLoop]: === Iteration 110 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:21,855 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:21,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2139960903, now seen corresponding path program 107 times [2018-10-04 13:00:21,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:21,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:21,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:21,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:21,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:22,079 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:22,440 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:22,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:22,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:22,570 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:00:22,629 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-10-04 13:00:22,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:22,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:22,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:22,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 13:00:22,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 13:00:22,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 13:00:22,832 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:22,832 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2018-10-04 13:00:23,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:23,283 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2018-10-04 13:00:23,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 13:00:23,284 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 13:00:23,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:23,284 INFO L225 Difference]: With dead ends: 120 [2018-10-04 13:00:23,284 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 13:00:23,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 9 [2018-10-04 13:00:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 13:00:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 13:00:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 13:00:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-04 13:00:23,290 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 78 [2018-10-04 13:00:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:23,290 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-04 13:00:23,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 13:00:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-04 13:00:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 13:00:23,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:23,291 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1] [2018-10-04 13:00:23,291 INFO L423 AbstractCegarLoop]: === Iteration 111 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:23,291 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:23,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1486335213, now seen corresponding path program 108 times [2018-10-04 13:00:23,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:23,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:23,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:23,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:23,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:23,443 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:23,674 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:23,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:23,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:23,786 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:00:23,836 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 13:00:23,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:23,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:23,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:23,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 13:00:23,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 13:00:23,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 13:00:23,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:23,994 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-10-04 13:00:24,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:24,115 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2018-10-04 13:00:24,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 13:00:24,115 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-04 13:00:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:24,116 INFO L225 Difference]: With dead ends: 83 [2018-10-04 13:00:24,116 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 13:00:24,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 10 [2018-10-04 13:00:24,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 13:00:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 13:00:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 13:00:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-10-04 13:00:24,122 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 78 [2018-10-04 13:00:24,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:24,122 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-10-04 13:00:24,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 13:00:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-10-04 13:00:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 13:00:24,123 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:24,123 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1] [2018-10-04 13:00:24,124 INFO L423 AbstractCegarLoop]: === Iteration 112 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:24,124 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:24,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1168310175, now seen corresponding path program 109 times [2018-10-04 13:00:24,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:24,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:24,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:24,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:24,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:24,424 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:24,982 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:25,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:25,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:25,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:25,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:25,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:25,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 13:00:25,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 13:00:25,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 13:00:25,449 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:25,449 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 40 states. [2018-10-04 13:00:27,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:27,343 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-04 13:00:27,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 13:00:27,343 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2018-10-04 13:00:27,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:27,344 INFO L225 Difference]: With dead ends: 122 [2018-10-04 13:00:27,344 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 13:00:27,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 38 [2018-10-04 13:00:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 13:00:27,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 82. [2018-10-04 13:00:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 13:00:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2018-10-04 13:00:27,351 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2018-10-04 13:00:27,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:27,351 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2018-10-04 13:00:27,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 13:00:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2018-10-04 13:00:27,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 13:00:27,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:27,352 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-04 13:00:27,352 INFO L423 AbstractCegarLoop]: === Iteration 113 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:27,352 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:27,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1857938579, now seen corresponding path program 110 times [2018-10-04 13:00:27,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:27,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:27,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:27,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:27,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:27,520 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:27,863 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:28,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:28,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:28,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:00:28,057 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:00:28,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:28,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:28,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:28,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 13:00:28,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 13:00:28,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 13:00:28,213 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:28,213 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2018-10-04 13:00:28,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:28,600 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2018-10-04 13:00:28,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 13:00:28,601 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-04 13:00:28,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:28,601 INFO L225 Difference]: With dead ends: 123 [2018-10-04 13:00:28,602 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 13:00:28,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 10 [2018-10-04 13:00:28,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 13:00:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 13:00:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 13:00:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-04 13:00:28,608 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 80 [2018-10-04 13:00:28,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:28,608 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-04 13:00:28,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 13:00:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-04 13:00:28,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 13:00:28,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:28,608 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1] [2018-10-04 13:00:28,608 INFO L423 AbstractCegarLoop]: === Iteration 114 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:28,609 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:28,609 INFO L82 PathProgramCache]: Analyzing trace with hash -645498489, now seen corresponding path program 111 times [2018-10-04 13:00:28,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:28,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:28,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:28,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:28,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:28,796 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:29,027 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:29,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:29,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:29,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:00:29,217 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-10-04 13:00:29,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:29,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:29,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:29,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 13:00:29,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 13:00:29,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 13:00:29,380 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:29,380 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 41 states. [2018-10-04 13:00:29,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:29,502 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-04 13:00:29,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 13:00:29,502 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-04 13:00:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:29,503 INFO L225 Difference]: With dead ends: 85 [2018-10-04 13:00:29,503 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 13:00:29,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 11 [2018-10-04 13:00:29,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 13:00:29,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 13:00:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 13:00:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-10-04 13:00:29,508 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2018-10-04 13:00:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:29,508 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-10-04 13:00:29,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 13:00:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-10-04 13:00:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 13:00:29,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:29,509 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1] [2018-10-04 13:00:29,509 INFO L423 AbstractCegarLoop]: === Iteration 115 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:29,510 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:29,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1464321799, now seen corresponding path program 112 times [2018-10-04 13:00:29,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:29,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:29,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:29,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:29,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:29,807 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:30,360 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:30,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:30,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:30,610 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:00:30,659 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:00:30,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:30,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:30,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:30,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 13:00:30,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 13:00:30,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 13:00:30,842 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:30,842 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 41 states. [2018-10-04 13:00:32,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:32,778 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-10-04 13:00:32,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 13:00:32,779 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2018-10-04 13:00:32,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:32,779 INFO L225 Difference]: With dead ends: 125 [2018-10-04 13:00:32,779 INFO L226 Difference]: Without dead ends: 122 [2018-10-04 13:00:32,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 39 [2018-10-04 13:00:32,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-04 13:00:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2018-10-04 13:00:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 13:00:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-04 13:00:32,785 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2018-10-04 13:00:32,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:32,785 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-04 13:00:32,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 13:00:32,786 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-04 13:00:32,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 13:00:32,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:32,786 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-04 13:00:32,786 INFO L423 AbstractCegarLoop]: === Iteration 116 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:32,786 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:32,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1850726009, now seen corresponding path program 113 times [2018-10-04 13:00:32,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:32,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:32,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:32,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:32,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:33,080 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:33,483 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:33,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:33,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:33,637 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:00:33,699 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-10-04 13:00:33,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:33,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:33,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:33,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 13:00:33,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 13:00:33,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 13:00:33,860 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:33,860 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 42 states. [2018-10-04 13:00:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:34,346 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-10-04 13:00:34,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 13:00:34,347 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 13:00:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:34,347 INFO L225 Difference]: With dead ends: 126 [2018-10-04 13:00:34,347 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 13:00:34,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 11 [2018-10-04 13:00:34,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 13:00:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 13:00:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 13:00:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-04 13:00:34,354 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 82 [2018-10-04 13:00:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:34,355 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-04 13:00:34,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 13:00:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-04 13:00:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 13:00:34,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:34,355 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1] [2018-10-04 13:00:34,356 INFO L423 AbstractCegarLoop]: === Iteration 117 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:34,356 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:34,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1375178413, now seen corresponding path program 114 times [2018-10-04 13:00:34,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:34,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:34,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:34,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:34,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:34,488 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:34,672 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:34,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:34,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:34,810 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:00:34,868 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-04 13:00:34,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:34,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:35,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:35,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 13:00:35,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 13:00:35,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 13:00:35,033 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:35,033 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-10-04 13:00:35,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:35,164 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-10-04 13:00:35,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 13:00:35,165 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-04 13:00:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:35,165 INFO L225 Difference]: With dead ends: 87 [2018-10-04 13:00:35,166 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 13:00:35,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 12 [2018-10-04 13:00:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 13:00:35,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 13:00:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 13:00:35,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-04 13:00:35,171 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 82 [2018-10-04 13:00:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:35,171 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-04 13:00:35,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 13:00:35,172 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-04 13:00:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 13:00:35,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:35,172 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1] [2018-10-04 13:00:35,172 INFO L423 AbstractCegarLoop]: === Iteration 118 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:35,172 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:35,173 INFO L82 PathProgramCache]: Analyzing trace with hash -319203679, now seen corresponding path program 115 times [2018-10-04 13:00:35,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:35,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:35,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:35,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:35,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:35,504 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:36,037 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:36,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:36,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:36,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:36,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:36,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:36,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 13:00:36,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 13:00:36,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 13:00:36,572 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:36,572 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2018-10-04 13:00:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:38,606 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-04 13:00:38,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 13:00:38,607 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2018-10-04 13:00:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:38,607 INFO L225 Difference]: With dead ends: 128 [2018-10-04 13:00:38,607 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 13:00:38,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 40 [2018-10-04 13:00:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 13:00:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2018-10-04 13:00:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 13:00:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-04 13:00:38,614 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2018-10-04 13:00:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:38,614 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-04 13:00:38,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 13:00:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-04 13:00:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 13:00:38,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:38,615 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-04 13:00:38,615 INFO L423 AbstractCegarLoop]: === Iteration 119 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:38,615 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:38,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1305440979, now seen corresponding path program 116 times [2018-10-04 13:00:38,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:38,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:38,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:38,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:38,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:38,820 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:39,028 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:39,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:39,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:39,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:00:39,251 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:00:39,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:39,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:39,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:39,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 13:00:39,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 13:00:39,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 13:00:39,417 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:39,418 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 43 states. [2018-10-04 13:00:39,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:39,748 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2018-10-04 13:00:39,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 13:00:39,749 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-04 13:00:39,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:39,749 INFO L225 Difference]: With dead ends: 129 [2018-10-04 13:00:39,750 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 13:00:39,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 12 [2018-10-04 13:00:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 13:00:39,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 13:00:39,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 13:00:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-04 13:00:39,757 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2018-10-04 13:00:39,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:39,757 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-04 13:00:39,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 13:00:39,757 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-04 13:00:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 13:00:39,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:39,758 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1] [2018-10-04 13:00:39,758 INFO L423 AbstractCegarLoop]: === Iteration 120 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:39,758 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:39,758 INFO L82 PathProgramCache]: Analyzing trace with hash -86651705, now seen corresponding path program 117 times [2018-10-04 13:00:39,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:39,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:39,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:39,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:39,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:40,111 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:40,319 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:40,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:40,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:40,413 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:00:40,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 13:00:40,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:40,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 820 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:40,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:40,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 13:00:40,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 13:00:40,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 13:00:40,671 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:40,672 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 43 states. [2018-10-04 13:00:40,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:40,836 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-04 13:00:40,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 13:00:40,837 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-04 13:00:40,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:40,837 INFO L225 Difference]: With dead ends: 89 [2018-10-04 13:00:40,838 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 13:00:40,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 12 [2018-10-04 13:00:40,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 13:00:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 13:00:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 13:00:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-10-04 13:00:40,844 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2018-10-04 13:00:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:40,845 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-10-04 13:00:40,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 13:00:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-10-04 13:00:40,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 13:00:40,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:40,845 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1] [2018-10-04 13:00:40,846 INFO L423 AbstractCegarLoop]: === Iteration 121 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:40,846 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:40,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1608702919, now seen corresponding path program 118 times [2018-10-04 13:00:40,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:40,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:40,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:40,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:40,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:41,155 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:41,693 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:42,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:42,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:42,040 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:00:42,088 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:00:42,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:42,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:42,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:42,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 13:00:42,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 13:00:42,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 13:00:42,286 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:42,286 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 43 states. [2018-10-04 13:00:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:44,427 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-10-04 13:00:44,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 13:00:44,428 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2018-10-04 13:00:44,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:44,429 INFO L225 Difference]: With dead ends: 131 [2018-10-04 13:00:44,429 INFO L226 Difference]: Without dead ends: 128 [2018-10-04 13:00:44,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 41 [2018-10-04 13:00:44,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-10-04 13:00:44,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 88. [2018-10-04 13:00:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 13:00:44,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2018-10-04 13:00:44,437 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2018-10-04 13:00:44,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:44,437 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2018-10-04 13:00:44,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 13:00:44,438 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2018-10-04 13:00:44,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 13:00:44,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:44,438 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-04 13:00:44,438 INFO L423 AbstractCegarLoop]: === Iteration 122 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:44,438 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:44,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1669878585, now seen corresponding path program 119 times [2018-10-04 13:00:44,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:44,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:44,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:44,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:44,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:44,621 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:44,982 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:45,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:45,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:45,223 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:00:45,285 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 13:00:45,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:45,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:45,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:45,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 13:00:45,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 13:00:45,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 13:00:45,451 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:45,451 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 44 states. [2018-10-04 13:00:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:45,962 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-10-04 13:00:45,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 13:00:45,963 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 13:00:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:45,963 INFO L225 Difference]: With dead ends: 132 [2018-10-04 13:00:45,963 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 13:00:45,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 13 [2018-10-04 13:00:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 13:00:45,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 13:00:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 13:00:45,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-04 13:00:45,971 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 86 [2018-10-04 13:00:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:45,971 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-04 13:00:45,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 13:00:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-04 13:00:45,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 13:00:45,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:45,972 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1] [2018-10-04 13:00:45,972 INFO L423 AbstractCegarLoop]: === Iteration 123 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:45,972 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:45,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1752850541, now seen corresponding path program 120 times [2018-10-04 13:00:45,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:45,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:45,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:45,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:45,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:46,126 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:46,320 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:46,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:46,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:46,496 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:00:46,554 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 13:00:46,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:46,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:46,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:46,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 13:00:46,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 13:00:46,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 13:00:46,728 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:46,728 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-10-04 13:00:46,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:46,867 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-10-04 13:00:46,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 13:00:46,867 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-04 13:00:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:46,868 INFO L225 Difference]: With dead ends: 91 [2018-10-04 13:00:46,868 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 13:00:46,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 14 [2018-10-04 13:00:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 13:00:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 13:00:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 13:00:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-10-04 13:00:46,875 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 86 [2018-10-04 13:00:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:46,875 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-10-04 13:00:46,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 13:00:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-10-04 13:00:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 13:00:46,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:46,876 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1] [2018-10-04 13:00:46,876 INFO L423 AbstractCegarLoop]: === Iteration 124 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:46,876 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:46,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269599, now seen corresponding path program 121 times [2018-10-04 13:00:46,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:46,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:46,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:46,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:46,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:47,342 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:47,883 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:48,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:48,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:48,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:48,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:48,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:48,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 13:00:48,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 13:00:48,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 13:00:48,588 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:48,588 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 44 states. [2018-10-04 13:00:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:50,843 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-04 13:00:50,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 13:00:50,843 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2018-10-04 13:00:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:50,844 INFO L225 Difference]: With dead ends: 134 [2018-10-04 13:00:50,844 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 13:00:50,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.0s impTime 42 [2018-10-04 13:00:50,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 13:00:50,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2018-10-04 13:00:50,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 13:00:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-10-04 13:00:50,852 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2018-10-04 13:00:50,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:50,853 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-10-04 13:00:50,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 13:00:50,853 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-10-04 13:00:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 13:00:50,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:50,853 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-04 13:00:50,854 INFO L423 AbstractCegarLoop]: === Iteration 125 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:50,854 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:50,854 INFO L82 PathProgramCache]: Analyzing trace with hash 860221165, now seen corresponding path program 122 times [2018-10-04 13:00:50,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:50,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:50,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:50,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:50,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:51,074 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:51,369 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:51,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:51,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:51,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:00:51,677 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:00:51,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:51,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:51,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:51,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 13:00:51,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 13:00:51,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 13:00:51,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:51,908 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 45 states. [2018-10-04 13:00:52,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:52,328 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2018-10-04 13:00:52,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 13:00:52,328 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-04 13:00:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:52,329 INFO L225 Difference]: With dead ends: 135 [2018-10-04 13:00:52,329 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 13:00:52,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 14 [2018-10-04 13:00:52,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 13:00:52,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 13:00:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 13:00:52,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-04 13:00:52,334 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 88 [2018-10-04 13:00:52,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:52,334 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-04 13:00:52,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 13:00:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-04 13:00:52,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 13:00:52,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:52,335 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1] [2018-10-04 13:00:52,335 INFO L423 AbstractCegarLoop]: === Iteration 126 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:52,336 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:52,336 INFO L82 PathProgramCache]: Analyzing trace with hash -409358329, now seen corresponding path program 123 times [2018-10-04 13:00:52,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:52,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:52,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:52,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:52,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:52,527 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:52,757 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:52,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:52,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:52,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:00:53,032 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 13:00:53,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:53,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:53,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:53,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 13:00:53,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 13:00:53,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 13:00:53,200 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:53,200 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 45 states. [2018-10-04 13:00:53,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:53,337 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-04 13:00:53,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 13:00:53,337 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-04 13:00:53,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:53,338 INFO L225 Difference]: With dead ends: 93 [2018-10-04 13:00:53,338 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 13:00:53,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 15 [2018-10-04 13:00:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 13:00:53,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 13:00:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 13:00:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-04 13:00:53,342 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2018-10-04 13:00:53,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:53,343 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-04 13:00:53,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 13:00:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-04 13:00:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 13:00:53,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:53,343 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1] [2018-10-04 13:00:53,343 INFO L423 AbstractCegarLoop]: === Iteration 127 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:53,344 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:53,344 INFO L82 PathProgramCache]: Analyzing trace with hash 194732167, now seen corresponding path program 124 times [2018-10-04 13:00:53,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:53,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:53,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:53,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:53,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:53,651 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:54,184 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:54,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:54,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:54,623 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:00:54,677 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:00:54,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:54,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:54,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:54,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 13:00:54,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 13:00:54,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 13:00:54,862 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:54,862 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 45 states. [2018-10-04 13:00:57,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:57,161 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-10-04 13:00:57,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 13:00:57,162 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2018-10-04 13:00:57,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:57,162 INFO L225 Difference]: With dead ends: 137 [2018-10-04 13:00:57,162 INFO L226 Difference]: Without dead ends: 134 [2018-10-04 13:00:57,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 43 [2018-10-04 13:00:57,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-04 13:00:57,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 92. [2018-10-04 13:00:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 13:00:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2018-10-04 13:00:57,169 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2018-10-04 13:00:57,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:57,170 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2018-10-04 13:00:57,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 13:00:57,170 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2018-10-04 13:00:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 13:00:57,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:57,171 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-04 13:00:57,171 INFO L423 AbstractCegarLoop]: === Iteration 128 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:57,171 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:57,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1741668359, now seen corresponding path program 125 times [2018-10-04 13:00:57,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:57,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:57,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:57,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:57,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:57,429 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:57,681 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:57,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:57,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:57,854 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:00:57,920 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-04 13:00:57,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:57,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:58,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:58,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 13:00:58,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 13:00:58,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 13:00:58,082 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:58,082 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 46 states. [2018-10-04 13:00:58,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:58,426 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-10-04 13:00:58,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 13:00:58,428 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 13:00:58,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:58,429 INFO L225 Difference]: With dead ends: 138 [2018-10-04 13:00:58,429 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 13:00:58,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 15 [2018-10-04 13:00:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 13:00:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 13:00:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 13:00:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-04 13:00:58,435 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 90 [2018-10-04 13:00:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:58,435 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-04 13:00:58,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 13:00:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-04 13:00:58,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 13:00:58,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:58,436 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1] [2018-10-04 13:00:58,436 INFO L423 AbstractCegarLoop]: === Iteration 129 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:58,436 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:58,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1039409709, now seen corresponding path program 126 times [2018-10-04 13:00:58,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:58,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:58,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:58,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:58,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:58,587 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:58,797 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:59,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:59,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:59,020 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:00:59,081 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-04 13:00:59,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:59,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:59,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:59,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 13:00:59,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 13:00:59,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 13:00:59,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:59,237 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-10-04 13:00:59,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:59,369 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2018-10-04 13:00:59,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 13:00:59,370 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-04 13:00:59,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:59,370 INFO L225 Difference]: With dead ends: 95 [2018-10-04 13:00:59,370 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 13:00:59,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 16 [2018-10-04 13:00:59,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 13:00:59,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 13:00:59,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 13:00:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2018-10-04 13:00:59,375 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 90 [2018-10-04 13:00:59,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:59,375 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2018-10-04 13:00:59,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 13:00:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2018-10-04 13:00:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 13:00:59,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:59,376 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1] [2018-10-04 13:00:59,376 INFO L423 AbstractCegarLoop]: === Iteration 130 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:59,376 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:59,376 INFO L82 PathProgramCache]: Analyzing trace with hash -2138098911, now seen corresponding path program 127 times [2018-10-04 13:00:59,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:59,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:59,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:59,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:59,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:59,702 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:00,206 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:00,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:00,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:00,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:00,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:00,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:00,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 13:01:00,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 13:01:00,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 13:01:00,919 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:00,919 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 46 states. [2018-10-04 13:01:03,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:03,230 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-04 13:01:03,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 13:01:03,231 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2018-10-04 13:01:03,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:03,231 INFO L225 Difference]: With dead ends: 140 [2018-10-04 13:01:03,231 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 13:01:03,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 44 [2018-10-04 13:01:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 13:01:03,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2018-10-04 13:01:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 13:01:03,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-04 13:01:03,238 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2018-10-04 13:01:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:03,238 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-04 13:01:03,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 13:01:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-04 13:01:03,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 13:01:03,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:03,239 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-04 13:01:03,239 INFO L423 AbstractCegarLoop]: === Iteration 131 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:03,239 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:03,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1856618323, now seen corresponding path program 128 times [2018-10-04 13:01:03,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:03,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:03,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:03,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:03,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:03,447 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:03,796 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:04,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:04,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:04,175 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:01:04,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:01:04,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:04,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:04,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:04,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 13:01:04,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 13:01:04,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 13:01:04,392 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:04,393 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 47 states. [2018-10-04 13:01:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:04,980 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-10-04 13:01:04,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 13:01:04,980 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-04 13:01:04,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:04,981 INFO L225 Difference]: With dead ends: 141 [2018-10-04 13:01:04,981 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 13:01:04,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 16 [2018-10-04 13:01:04,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 13:01:04,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 13:01:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 13:01:04,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-04 13:01:04,986 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2018-10-04 13:01:04,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:04,986 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-04 13:01:04,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 13:01:04,987 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-04 13:01:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 13:01:04,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:04,987 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1] [2018-10-04 13:01:04,987 INFO L423 AbstractCegarLoop]: === Iteration 132 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:04,987 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:04,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2143167303, now seen corresponding path program 129 times [2018-10-04 13:01:04,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:04,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:04,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:04,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:04,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:05,168 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:05,384 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:05,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:05,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:05,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:01:05,691 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-04 13:01:05,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:05,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:05,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:05,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 13:01:05,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 13:01:05,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 13:01:05,869 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:05,869 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 47 states. [2018-10-04 13:01:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:06,015 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-04 13:01:06,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 13:01:06,015 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-04 13:01:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:06,016 INFO L225 Difference]: With dead ends: 97 [2018-10-04 13:01:06,016 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 13:01:06,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 17 [2018-10-04 13:01:06,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 13:01:06,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 13:01:06,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 13:01:06,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-10-04 13:01:06,024 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2018-10-04 13:01:06,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:06,024 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-10-04 13:01:06,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 13:01:06,024 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-10-04 13:01:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 13:01:06,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:06,025 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1] [2018-10-04 13:01:06,025 INFO L423 AbstractCegarLoop]: === Iteration 133 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:06,025 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:06,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2013615431, now seen corresponding path program 130 times [2018-10-04 13:01:06,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:06,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:06,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:06,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:06,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:06,446 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:06,958 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:07,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:07,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:07,478 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:01:07,529 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:01:07,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:07,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:07,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:07,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 13:01:07,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 13:01:07,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 13:01:07,715 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:07,715 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 47 states. [2018-10-04 13:01:10,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:10,122 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2018-10-04 13:01:10,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 13:01:10,122 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2018-10-04 13:01:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:10,123 INFO L225 Difference]: With dead ends: 143 [2018-10-04 13:01:10,123 INFO L226 Difference]: Without dead ends: 140 [2018-10-04 13:01:10,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 45 [2018-10-04 13:01:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-10-04 13:01:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2018-10-04 13:01:10,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 13:01:10,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-10-04 13:01:10,130 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2018-10-04 13:01:10,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:10,130 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-10-04 13:01:10,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 13:01:10,130 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-10-04 13:01:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 13:01:10,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:10,130 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-04 13:01:10,131 INFO L423 AbstractCegarLoop]: === Iteration 134 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:10,131 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:10,131 INFO L82 PathProgramCache]: Analyzing trace with hash -2002492601, now seen corresponding path program 131 times [2018-10-04 13:01:10,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:10,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:10,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:10,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:10,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:10,411 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:10,635 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:10,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:10,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:10,832 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:01:10,903 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 13:01:10,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:10,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:11,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:11,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 13:01:11,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 13:01:11,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 13:01:11,079 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:11,079 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2018-10-04 13:01:11,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:11,484 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2018-10-04 13:01:11,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 13:01:11,484 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 13:01:11,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:11,485 INFO L225 Difference]: With dead ends: 144 [2018-10-04 13:01:11,485 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 13:01:11,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 17 [2018-10-04 13:01:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 13:01:11,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 13:01:11,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 13:01:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-04 13:01:11,491 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 94 [2018-10-04 13:01:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:11,491 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-04 13:01:11,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 13:01:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-04 13:01:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 13:01:11,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:11,492 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1] [2018-10-04 13:01:11,492 INFO L423 AbstractCegarLoop]: === Iteration 135 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:11,492 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:11,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1731777517, now seen corresponding path program 132 times [2018-10-04 13:01:11,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:11,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:11,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:11,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:11,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:11,666 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:11,787 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:11,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:11,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:11,965 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:01:12,031 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-04 13:01:12,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:12,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:12,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:12,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 13:01:12,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 13:01:12,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 13:01:12,242 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:12,243 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-10-04 13:01:12,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:12,389 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2018-10-04 13:01:12,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 13:01:12,390 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-04 13:01:12,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:12,390 INFO L225 Difference]: With dead ends: 99 [2018-10-04 13:01:12,390 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 13:01:12,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 16 [2018-10-04 13:01:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 13:01:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 13:01:12,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 13:01:12,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-10-04 13:01:12,397 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 94 [2018-10-04 13:01:12,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:12,397 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-10-04 13:01:12,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 13:01:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-10-04 13:01:12,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 13:01:12,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:12,398 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1] [2018-10-04 13:01:12,398 INFO L423 AbstractCegarLoop]: === Iteration 136 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:12,398 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:12,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2145433953, now seen corresponding path program 133 times [2018-10-04 13:01:12,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:12,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:12,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:12,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:12,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:12,692 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:13,195 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:13,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:13,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:13,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:13,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:14,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:14,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 13:01:14,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 13:01:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 13:01:14,021 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:14,021 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 48 states. [2018-10-04 13:01:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:16,568 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-04 13:01:16,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 13:01:16,568 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2018-10-04 13:01:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:16,569 INFO L225 Difference]: With dead ends: 146 [2018-10-04 13:01:16,569 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 13:01:16,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime 46 [2018-10-04 13:01:16,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 13:01:16,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 98. [2018-10-04 13:01:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 13:01:16,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2018-10-04 13:01:16,575 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2018-10-04 13:01:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:16,576 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2018-10-04 13:01:16,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 13:01:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2018-10-04 13:01:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 13:01:16,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:16,576 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-04 13:01:16,576 INFO L423 AbstractCegarLoop]: === Iteration 137 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:16,576 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:16,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2083881581, now seen corresponding path program 134 times [2018-10-04 13:01:16,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:16,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:16,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:16,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:16,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:16,758 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:16,977 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:17,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:17,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:17,305 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:01:17,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:01:17,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:17,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:17,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:17,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 13:01:17,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 13:01:17,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 13:01:17,531 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:17,531 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2018-10-04 13:01:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:17,967 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2018-10-04 13:01:17,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 13:01:17,967 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-04 13:01:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:17,968 INFO L225 Difference]: With dead ends: 147 [2018-10-04 13:01:17,968 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 13:01:17,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 18 [2018-10-04 13:01:17,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 13:01:17,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 13:01:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 13:01:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-04 13:01:17,974 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 96 [2018-10-04 13:01:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:17,974 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-04 13:01:17,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 13:01:17,974 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-04 13:01:17,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 13:01:17,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:17,975 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1] [2018-10-04 13:01:17,975 INFO L423 AbstractCegarLoop]: === Iteration 138 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:17,975 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:17,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1882138247, now seen corresponding path program 135 times [2018-10-04 13:01:17,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:17,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:17,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:17,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:17,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:18,127 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:18,320 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:18,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:18,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:18,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:01:18,668 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 13:01:18,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:18,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1081 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:18,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:18,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 13:01:18,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 13:01:18,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 13:01:18,848 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:18,848 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 49 states. [2018-10-04 13:01:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:18,991 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-04 13:01:18,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 13:01:18,992 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-04 13:01:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:18,992 INFO L225 Difference]: With dead ends: 101 [2018-10-04 13:01:18,992 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 13:01:18,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 19 [2018-10-04 13:01:18,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 13:01:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 13:01:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 13:01:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2018-10-04 13:01:18,998 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2018-10-04 13:01:18,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:18,998 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2018-10-04 13:01:18,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 13:01:18,999 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2018-10-04 13:01:18,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 13:01:18,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:18,999 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1] [2018-10-04 13:01:18,999 INFO L423 AbstractCegarLoop]: === Iteration 139 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:18,999 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:18,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1783318009, now seen corresponding path program 136 times [2018-10-04 13:01:18,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:18,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:19,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:19,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:19,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:19,295 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:19,802 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:20,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:20,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:20,419 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:01:20,477 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:01:20,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:20,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:20,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:20,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 13:01:20,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 13:01:20,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 13:01:20,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:20,680 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 49 states. [2018-10-04 13:01:23,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:23,303 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-10-04 13:01:23,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 13:01:23,304 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 97 [2018-10-04 13:01:23,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:23,305 INFO L225 Difference]: With dead ends: 149 [2018-10-04 13:01:23,305 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 13:01:23,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 47 [2018-10-04 13:01:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 13:01:23,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2018-10-04 13:01:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 13:01:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-04 13:01:23,311 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2018-10-04 13:01:23,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:23,311 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-04 13:01:23,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 13:01:23,311 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-04 13:01:23,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 13:01:23,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:23,311 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-04 13:01:23,311 INFO L423 AbstractCegarLoop]: === Iteration 140 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:23,312 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:23,312 INFO L82 PathProgramCache]: Analyzing trace with hash 551655047, now seen corresponding path program 137 times [2018-10-04 13:01:23,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:23,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:23,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:23,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:23,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:23,486 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:23,722 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:24,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:24,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:24,096 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:01:24,171 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 13:01:24,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:24,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:24,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:24,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 13:01:24,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 13:01:24,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 13:01:24,398 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:24,398 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 50 states. [2018-10-04 13:01:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:24,861 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-10-04 13:01:24,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 13:01:24,861 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 13:01:24,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:24,862 INFO L225 Difference]: With dead ends: 150 [2018-10-04 13:01:24,862 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 13:01:24,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 19 [2018-10-04 13:01:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 13:01:24,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 13:01:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 13:01:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-04 13:01:24,868 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 98 [2018-10-04 13:01:24,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:24,868 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-04 13:01:24,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 13:01:24,868 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-04 13:01:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 13:01:24,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:24,869 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1] [2018-10-04 13:01:24,869 INFO L423 AbstractCegarLoop]: === Iteration 141 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:24,869 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:24,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1407421011, now seen corresponding path program 138 times [2018-10-04 13:01:24,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:24,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:24,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:24,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:24,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:25,030 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:25,210 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:25,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:25,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:25,359 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:01:25,431 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 13:01:25,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:25,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1128 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:25,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:25,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 13:01:25,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 13:01:25,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 13:01:25,614 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:25,614 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-10-04 13:01:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:25,807 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-10-04 13:01:25,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 13:01:25,807 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-04 13:01:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:25,808 INFO L225 Difference]: With dead ends: 103 [2018-10-04 13:01:25,808 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 13:01:25,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 20 [2018-10-04 13:01:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 13:01:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 13:01:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 13:01:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-10-04 13:01:25,814 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 98 [2018-10-04 13:01:25,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:25,815 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-10-04 13:01:25,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 13:01:25,815 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-10-04 13:01:25,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 13:01:25,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:25,815 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1] [2018-10-04 13:01:25,815 INFO L423 AbstractCegarLoop]: === Iteration 142 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:25,815 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:25,815 INFO L82 PathProgramCache]: Analyzing trace with hash -680439903, now seen corresponding path program 139 times [2018-10-04 13:01:25,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:25,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:25,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:25,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:25,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:26,117 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:26,620 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:27,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:27,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:27,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:27,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:27,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:27,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 13:01:27,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 13:01:27,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 13:01:27,557 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:27,557 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 50 states. [2018-10-04 13:01:30,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:30,279 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-04 13:01:30,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 13:01:30,279 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 99 [2018-10-04 13:01:30,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:30,280 INFO L225 Difference]: With dead ends: 152 [2018-10-04 13:01:30,280 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 13:01:30,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 48 [2018-10-04 13:01:30,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 13:01:30,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2018-10-04 13:01:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 13:01:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2018-10-04 13:01:30,287 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2018-10-04 13:01:30,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:30,287 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2018-10-04 13:01:30,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 13:01:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2018-10-04 13:01:30,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 13:01:30,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:30,288 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-04 13:01:30,288 INFO L423 AbstractCegarLoop]: === Iteration 143 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:30,288 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:30,288 INFO L82 PathProgramCache]: Analyzing trace with hash 381137965, now seen corresponding path program 140 times [2018-10-04 13:01:30,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:30,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:30,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:30,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:30,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:30,506 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:30,692 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:30,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:30,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:30,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:01:31,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:01:31,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:31,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:31,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:31,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 13:01:31,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 13:01:31,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 13:01:31,211 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:31,212 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 51 states. [2018-10-04 13:01:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:31,638 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2018-10-04 13:01:31,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 13:01:31,638 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-04 13:01:31,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:31,639 INFO L225 Difference]: With dead ends: 153 [2018-10-04 13:01:31,639 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 13:01:31,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 20 [2018-10-04 13:01:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 13:01:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 13:01:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 13:01:31,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-04 13:01:31,646 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2018-10-04 13:01:31,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:31,647 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-04 13:01:31,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 13:01:31,647 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-04 13:01:31,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 13:01:31,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:31,647 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2018-10-04 13:01:31,648 INFO L423 AbstractCegarLoop]: === Iteration 144 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:31,648 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:31,648 INFO L82 PathProgramCache]: Analyzing trace with hash -220677689, now seen corresponding path program 141 times [2018-10-04 13:01:31,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:31,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:31,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:31,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:31,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:31,815 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:31,942 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:32,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:32,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:32,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:01:32,213 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-04 13:01:32,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:32,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1176 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:32,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:32,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 13:01:32,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 13:01:32,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 13:01:32,409 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:32,409 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 51 states. [2018-10-04 13:01:32,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:32,576 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-04 13:01:32,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 13:01:32,577 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-04 13:01:32,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:32,577 INFO L225 Difference]: With dead ends: 105 [2018-10-04 13:01:32,577 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 13:01:32,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 21 [2018-10-04 13:01:32,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 13:01:32,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 13:01:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 13:01:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-04 13:01:32,584 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2018-10-04 13:01:32,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:32,584 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-04 13:01:32,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 13:01:32,585 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-04 13:01:32,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 13:01:32,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:32,585 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1] [2018-10-04 13:01:32,585 INFO L423 AbstractCegarLoop]: === Iteration 145 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:32,585 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:32,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1748864711, now seen corresponding path program 142 times [2018-10-04 13:01:32,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:32,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:32,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:32,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:32,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:32,994 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:33,491 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:34,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:34,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:34,224 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:01:34,283 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:01:34,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:34,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:34,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:34,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 13:01:34,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 13:01:34,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 13:01:34,490 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:34,490 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 51 states. [2018-10-04 13:01:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:37,329 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2018-10-04 13:01:37,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 13:01:37,330 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 101 [2018-10-04 13:01:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:37,330 INFO L225 Difference]: With dead ends: 155 [2018-10-04 13:01:37,330 INFO L226 Difference]: Without dead ends: 152 [2018-10-04 13:01:37,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime 49 [2018-10-04 13:01:37,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-04 13:01:37,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2018-10-04 13:01:37,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 13:01:37,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2018-10-04 13:01:37,337 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 101 [2018-10-04 13:01:37,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:37,337 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2018-10-04 13:01:37,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 13:01:37,337 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2018-10-04 13:01:37,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 13:01:37,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:37,338 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-04 13:01:37,338 INFO L423 AbstractCegarLoop]: === Iteration 146 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:37,338 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:37,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1619830329, now seen corresponding path program 143 times [2018-10-04 13:01:37,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:37,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:37,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:37,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:37,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:37,508 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:37,713 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:38,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:38,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:38,059 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:01:38,138 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-04 13:01:38,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:38,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:38,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:38,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 13:01:38,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 13:01:38,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 13:01:38,325 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:38,325 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 52 states. [2018-10-04 13:01:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:38,748 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-10-04 13:01:38,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 13:01:38,749 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 13:01:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:38,749 INFO L225 Difference]: With dead ends: 156 [2018-10-04 13:01:38,750 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 13:01:38,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 20 [2018-10-04 13:01:38,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 13:01:38,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 13:01:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 13:01:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-04 13:01:38,757 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 102 [2018-10-04 13:01:38,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:38,757 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-04 13:01:38,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 13:01:38,757 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-04 13:01:38,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 13:01:38,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:38,757 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1] [2018-10-04 13:01:38,757 INFO L423 AbstractCegarLoop]: === Iteration 147 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:38,757 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:38,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1198720877, now seen corresponding path program 144 times [2018-10-04 13:01:38,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:38,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:38,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:38,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:38,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:38,901 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:39,019 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:39,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:39,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:39,185 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:01:39,259 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-04 13:01:39,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:39,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1225 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:39,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:39,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 13:01:39,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 13:01:39,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 13:01:39,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:39,441 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-10-04 13:01:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:39,613 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2018-10-04 13:01:39,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 13:01:39,613 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-04 13:01:39,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:39,614 INFO L225 Difference]: With dead ends: 107 [2018-10-04 13:01:39,614 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 13:01:39,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 20 [2018-10-04 13:01:39,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 13:01:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 13:01:39,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 13:01:39,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2018-10-04 13:01:39,622 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 102 [2018-10-04 13:01:39,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:39,622 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2018-10-04 13:01:39,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 13:01:39,622 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2018-10-04 13:01:39,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 13:01:39,623 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:39,623 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1] [2018-10-04 13:01:39,623 INFO L423 AbstractCegarLoop]: === Iteration 148 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:39,623 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:39,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1494419999, now seen corresponding path program 145 times [2018-10-04 13:01:39,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:39,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:39,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:39,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:39,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:39,932 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:40,436 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:41,299 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:01:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:41,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:41,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:41,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:41,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:41,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:41,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 13:01:41,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 13:01:41,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 13:01:41,667 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:41,667 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 52 states. [2018-10-04 13:01:44,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:44,620 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-04 13:01:44,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 13:01:44,620 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 103 [2018-10-04 13:01:44,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:44,621 INFO L225 Difference]: With dead ends: 158 [2018-10-04 13:01:44,621 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 13:01:44,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 50 [2018-10-04 13:01:44,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 13:01:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 106. [2018-10-04 13:01:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 13:01:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-04 13:01:44,629 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 103 [2018-10-04 13:01:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:44,630 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-04 13:01:44,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 13:01:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-04 13:01:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 13:01:44,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:44,630 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-04 13:01:44,631 INFO L423 AbstractCegarLoop]: === Iteration 149 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:44,631 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:44,631 INFO L82 PathProgramCache]: Analyzing trace with hash 917558765, now seen corresponding path program 146 times [2018-10-04 13:01:44,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:44,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:44,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:44,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:44,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:44,817 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:44,938 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:45,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:45,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:45,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:01:45,245 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:01:45,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:45,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:45,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:45,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 13:01:45,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 13:01:45,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 13:01:45,432 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:45,433 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2018-10-04 13:01:45,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:45,749 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2018-10-04 13:01:45,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 13:01:45,750 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-04 13:01:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:45,750 INFO L225 Difference]: With dead ends: 159 [2018-10-04 13:01:45,750 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 13:01:45,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 20 [2018-10-04 13:01:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 13:01:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 13:01:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 13:01:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-04 13:01:45,757 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 104 [2018-10-04 13:01:45,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:45,757 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-04 13:01:45,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 13:01:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-04 13:01:45,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 13:01:45,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:45,758 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1] [2018-10-04 13:01:45,758 INFO L423 AbstractCegarLoop]: === Iteration 150 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:45,758 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:45,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1901667065, now seen corresponding path program 147 times [2018-10-04 13:01:45,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:45,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:45,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:45,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:45,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:45,883 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:46,023 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:46,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:46,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:46,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:01:46,339 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-10-04 13:01:46,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:46,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1275 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:46,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:46,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 13:01:46,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 13:01:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 13:01:46,527 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:46,527 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 53 states. [2018-10-04 13:01:46,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:46,780 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-04 13:01:46,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 13:01:46,780 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-04 13:01:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:46,781 INFO L225 Difference]: With dead ends: 109 [2018-10-04 13:01:46,781 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 13:01:46,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 21 [2018-10-04 13:01:46,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 13:01:46,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 13:01:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 13:01:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-10-04 13:01:46,787 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2018-10-04 13:01:46,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:46,787 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-10-04 13:01:46,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 13:01:46,787 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-10-04 13:01:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 13:01:46,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:46,788 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1] [2018-10-04 13:01:46,788 INFO L423 AbstractCegarLoop]: === Iteration 151 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:46,788 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:46,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1177801607, now seen corresponding path program 148 times [2018-10-04 13:01:46,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:46,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:46,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:46,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:46,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:47,093 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:47,605 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:48,330 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:01:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:48,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:48,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:48,484 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:01:48,547 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:01:48,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:48,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:48,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:48,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 13:01:48,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 13:01:48,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 13:01:48,768 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:48,768 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2018-10-04 13:01:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:51,879 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-10-04 13:01:51,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 13:01:51,880 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2018-10-04 13:01:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:51,880 INFO L225 Difference]: With dead ends: 161 [2018-10-04 13:01:51,880 INFO L226 Difference]: Without dead ends: 158 [2018-10-04 13:01:51,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime 51 [2018-10-04 13:01:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-04 13:01:51,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2018-10-04 13:01:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 13:01:51,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-04 13:01:51,888 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2018-10-04 13:01:51,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:51,888 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-04 13:01:51,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 13:01:51,888 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-04 13:01:51,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 13:01:51,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:51,889 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-04 13:01:51,889 INFO L423 AbstractCegarLoop]: === Iteration 152 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:51,889 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:51,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2142917369, now seen corresponding path program 149 times [2018-10-04 13:01:51,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:51,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:51,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:51,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:51,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:52,140 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:52,375 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:52,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:52,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:52,740 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:01:52,826 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-10-04 13:01:52,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:52,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:53,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:53,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 13:01:53,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 13:01:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 13:01:53,022 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:53,022 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 54 states. [2018-10-04 13:01:53,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:53,505 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2018-10-04 13:01:53,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 13:01:53,506 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 13:01:53,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:53,506 INFO L225 Difference]: With dead ends: 162 [2018-10-04 13:01:53,506 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 13:01:53,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 21 [2018-10-04 13:01:53,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 13:01:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 13:01:53,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 13:01:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-04 13:01:53,515 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 106 [2018-10-04 13:01:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:53,516 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-04 13:01:53,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 13:01:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-04 13:01:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 13:01:53,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:53,516 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1] [2018-10-04 13:01:53,517 INFO L423 AbstractCegarLoop]: === Iteration 153 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:53,517 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:53,517 INFO L82 PathProgramCache]: Analyzing trace with hash 655395117, now seen corresponding path program 150 times [2018-10-04 13:01:53,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:53,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:53,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:53,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:53,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:53,664 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:53,774 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:53,960 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:54,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:54,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:54,038 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:01:54,117 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-04 13:01:54,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:54,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1326 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:54,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:54,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 13:01:54,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 13:01:54,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 13:01:54,309 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:54,309 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-10-04 13:01:54,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:54,522 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2018-10-04 13:01:54,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 13:01:54,523 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-04 13:01:54,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:54,523 INFO L225 Difference]: With dead ends: 111 [2018-10-04 13:01:54,523 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 13:01:54,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 7 [2018-10-04 13:01:54,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 13:01:54,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 13:01:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 13:01:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-04 13:01:54,531 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 106 [2018-10-04 13:01:54,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:54,531 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-04 13:01:54,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 13:01:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-04 13:01:54,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 13:01:54,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:54,532 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1] [2018-10-04 13:01:54,532 INFO L423 AbstractCegarLoop]: === Iteration 154 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:54,532 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:54,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1157649375, now seen corresponding path program 151 times [2018-10-04 13:01:54,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:54,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:54,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:54,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:54,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:54,841 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:55,337 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:56,059 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:01:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:56,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:56,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:56,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:56,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:56,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:56,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 13:01:56,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 13:01:56,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 13:01:56,562 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:56,562 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 54 states. [2018-10-04 13:01:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:59,782 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-04 13:01:59,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 13:01:59,783 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 107 [2018-10-04 13:01:59,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:59,784 INFO L225 Difference]: With dead ends: 164 [2018-10-04 13:01:59,784 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 13:01:59,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 52 [2018-10-04 13:01:59,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 13:01:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2018-10-04 13:01:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 13:01:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-04 13:01:59,790 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 107 [2018-10-04 13:01:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:59,791 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-04 13:01:59,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 13:01:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-04 13:01:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 13:01:59,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:59,791 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-04 13:01:59,791 INFO L423 AbstractCegarLoop]: === Iteration 155 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:59,791 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1527453779, now seen corresponding path program 152 times [2018-10-04 13:01:59,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:59,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:59,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:59,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:59,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:59,977 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:02:00,210 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:00,523 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:00,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:00,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:00,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:02:00,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:02:00,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:00,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:00,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:00,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 13:02:00,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 13:02:00,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 13:02:00,915 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:00,915 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 55 states. [2018-10-04 13:02:01,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:01,439 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2018-10-04 13:02:01,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 13:02:01,440 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-04 13:02:01,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:01,440 INFO L225 Difference]: With dead ends: 165 [2018-10-04 13:02:01,440 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 13:02:01,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 9 [2018-10-04 13:02:01,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 13:02:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 13:02:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 13:02:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-04 13:02:01,448 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2018-10-04 13:02:01,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:01,448 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-04 13:02:01,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 13:02:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-04 13:02:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 13:02:01,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:01,449 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1] [2018-10-04 13:02:01,449 INFO L423 AbstractCegarLoop]: === Iteration 156 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:02:01,449 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:01,450 INFO L82 PathProgramCache]: Analyzing trace with hash -679112633, now seen corresponding path program 153 times [2018-10-04 13:02:01,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:01,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:01,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:01,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:01,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:01,607 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:02:01,751 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:01,951 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:02,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:02,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:02,044 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:02:02,128 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 13:02:02,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:02,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1378 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:02,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:02,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 13:02:02,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 13:02:02,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 13:02:02,325 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:02,326 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 55 states. [2018-10-04 13:02:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:02,508 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-04 13:02:02,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 13:02:02,509 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-04 13:02:02,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:02,509 INFO L225 Difference]: With dead ends: 113 [2018-10-04 13:02:02,509 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 13:02:02,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 8 [2018-10-04 13:02:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 13:02:02,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 13:02:02,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 13:02:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2018-10-04 13:02:02,524 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2018-10-04 13:02:02,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:02,524 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2018-10-04 13:02:02,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 13:02:02,524 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2018-10-04 13:02:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-04 13:02:02,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:02,524 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1] [2018-10-04 13:02:02,525 INFO L423 AbstractCegarLoop]: === Iteration 157 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:02:02,525 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:02,525 INFO L82 PathProgramCache]: Analyzing trace with hash 422283335, now seen corresponding path program 154 times [2018-10-04 13:02:02,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:02,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:02,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:02,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:02,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:02,822 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:02:03,322 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:02:04,042 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:02:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:04,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:04,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:04,311 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:02:04,377 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:02:04,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:04,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:04,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:04,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 13:02:04,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 13:02:04,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 13:02:04,594 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:04,594 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 55 states. [2018-10-04 13:02:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:07,905 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2018-10-04 13:02:07,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 13:02:07,905 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 109 [2018-10-04 13:02:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:07,906 INFO L225 Difference]: With dead ends: 167 [2018-10-04 13:02:07,906 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 13:02:07,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime 53 [2018-10-04 13:02:07,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 13:02:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2018-10-04 13:02:07,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 13:02:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-04 13:02:07,914 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2018-10-04 13:02:07,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:07,914 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-04 13:02:07,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 13:02:07,914 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-04 13:02:07,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 13:02:07,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:07,914 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-04 13:02:07,915 INFO L423 AbstractCegarLoop]: === Iteration 158 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:02:07,915 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:07,915 INFO L82 PathProgramCache]: Analyzing trace with hash 205819975, now seen corresponding path program 155 times [2018-10-04 13:02:07,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:07,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:07,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:07,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:07,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:08,071 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:02:08,291 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:08,620 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:08,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:08,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:08,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:08,733 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:02:08,826 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 13:02:08,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:08,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:09,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:09,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 13:02:09,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 13:02:09,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 13:02:09,047 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:09,047 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2018-10-04 13:02:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:09,572 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-10-04 13:02:09,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 13:02:09,573 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 13:02:09,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:09,573 INFO L225 Difference]: With dead ends: 168 [2018-10-04 13:02:09,573 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 13:02:09,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 8 [2018-10-04 13:02:09,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 13:02:09,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 13:02:09,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 13:02:09,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-04 13:02:09,579 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 110 [2018-10-04 13:02:09,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:09,580 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-04 13:02:09,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 13:02:09,580 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-04 13:02:09,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 13:02:09,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:09,580 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1] [2018-10-04 13:02:09,580 INFO L423 AbstractCegarLoop]: === Iteration 159 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:02:09,580 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:09,580 INFO L82 PathProgramCache]: Analyzing trace with hash 734591725, now seen corresponding path program 156 times [2018-10-04 13:02:09,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:09,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:09,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:09,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:09,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:09,709 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:02:09,854 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:10,025 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:10,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:10,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:10,132 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:02:10,212 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 13:02:10,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:10,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:10,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:10,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 13:02:10,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 13:02:10,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 13:02:10,411 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:10,411 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-10-04 13:02:10,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:10,619 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-10-04 13:02:10,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 13:02:10,619 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-04 13:02:10,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:10,620 INFO L225 Difference]: With dead ends: 115 [2018-10-04 13:02:10,620 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 13:02:10,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 8 [2018-10-04 13:02:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 13:02:10,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 13:02:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 13:02:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-10-04 13:02:10,628 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 110 [2018-10-04 13:02:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:10,628 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-10-04 13:02:10,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 13:02:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-10-04 13:02:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 13:02:10,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:10,628 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1] [2018-10-04 13:02:10,629 INFO L423 AbstractCegarLoop]: === Iteration 160 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:02:10,629 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:10,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1297445473, now seen corresponding path program 157 times [2018-10-04 13:02:10,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:10,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:10,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:10,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:10,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:10,942 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:02:11,440 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:02:12,161 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:02:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:12,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:12,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:12,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:02:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:12,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:12,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:12,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 13:02:12,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 13:02:12,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 13:02:12,784 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:12,784 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 56 states. [2018-10-04 13:02:16,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:16,249 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-04 13:02:16,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 13:02:16,249 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 111 [2018-10-04 13:02:16,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:16,250 INFO L225 Difference]: With dead ends: 170 [2018-10-04 13:02:16,250 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 13:02:16,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.5s impTime 54 [2018-10-04 13:02:16,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 13:02:16,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2018-10-04 13:02:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 13:02:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2018-10-04 13:02:16,258 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2018-10-04 13:02:16,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:16,259 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2018-10-04 13:02:16,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 13:02:16,259 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2018-10-04 13:02:16,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 13:02:16,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:16,259 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-04 13:02:16,260 INFO L423 AbstractCegarLoop]: === Iteration 161 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:02:16,260 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:16,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1566042477, now seen corresponding path program 158 times [2018-10-04 13:02:16,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:16,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:16,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:16,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:02:16,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:16,430 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:02:16,542 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:16,725 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:16,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:16,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:16,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:02:16,936 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:02:16,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:16,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:17,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:17,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 13:02:17,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 13:02:17,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 13:02:17,124 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:17,124 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2018-10-04 13:02:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:17,471 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-10-04 13:02:17,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 13:02:17,471 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-04 13:02:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:17,472 INFO L225 Difference]: With dead ends: 171 [2018-10-04 13:02:17,472 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 13:02:17,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 11 [2018-10-04 13:02:17,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 13:02:17,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 13:02:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 13:02:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-04 13:02:17,480 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 112 [2018-10-04 13:02:17,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:17,480 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-04 13:02:17,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 13:02:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-04 13:02:17,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 13:02:17,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:17,480 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1] [2018-10-04 13:02:17,480 INFO L423 AbstractCegarLoop]: === Iteration 162 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:02:17,481 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:17,481 INFO L82 PathProgramCache]: Analyzing trace with hash 778097543, now seen corresponding path program 159 times [2018-10-04 13:02:17,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:17,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:17,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:17,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:17,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:17,609 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:02:17,753 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:17,881 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:17,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:17,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:17,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:02:18,067 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 13:02:18,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:18,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1485 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:18,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:18,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 13:02:18,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 13:02:18,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 13:02:18,261 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:18,261 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 57 states. [2018-10-04 13:02:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:18,501 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-04 13:02:18,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 13:02:18,501 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-04 13:02:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:18,502 INFO L225 Difference]: With dead ends: 117 [2018-10-04 13:02:18,502 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 13:02:18,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 10 [2018-10-04 13:02:18,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 13:02:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-04 13:02:18,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 13:02:18,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-10-04 13:02:18,512 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2018-10-04 13:02:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:18,512 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-10-04 13:02:18,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 13:02:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-10-04 13:02:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 13:02:18,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:18,513 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1] [2018-10-04 13:02:18,513 INFO L423 AbstractCegarLoop]: === Iteration 163 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:02:18,513 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1648841465, now seen corresponding path program 160 times [2018-10-04 13:02:18,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:18,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:18,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:18,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:18,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:18,821 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:02:19,320 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:02:20,043 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:02:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:20,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:20,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:20,431 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:02:20,498 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:02:20,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:20,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:20,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:20,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 13:02:20,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 13:02:20,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 13:02:20,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:20,719 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 57 states. [2018-10-04 13:02:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:24,289 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-10-04 13:02:24,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 13:02:24,290 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 113 [2018-10-04 13:02:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:24,290 INFO L225 Difference]: With dead ends: 173 [2018-10-04 13:02:24,291 INFO L226 Difference]: Without dead ends: 170 [2018-10-04 13:02:24,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.5s impTime 55 [2018-10-04 13:02:24,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-04 13:02:24,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2018-10-04 13:02:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 13:02:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-10-04 13:02:24,298 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2018-10-04 13:02:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:24,298 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-10-04 13:02:24,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 13:02:24,298 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-10-04 13:02:24,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 13:02:24,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:24,298 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-04 13:02:24,299 INFO L423 AbstractCegarLoop]: === Iteration 164 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:02:24,299 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:24,299 INFO L82 PathProgramCache]: Analyzing trace with hash 425460615, now seen corresponding path program 161 times [2018-10-04 13:02:24,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:24,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:24,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:24,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:24,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:24,473 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:02:24,685 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:25,047 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:25,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:25,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:25,208 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:02:25,306 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2018-10-04 13:02:25,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:25,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:25,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:25,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 13:02:25,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 13:02:25,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 13:02:25,506 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:25,506 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 58 states. [2018-10-04 13:02:26,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:26,063 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2018-10-04 13:02:26,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 13:02:26,063 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 13:02:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:26,063 INFO L225 Difference]: With dead ends: 174 [2018-10-04 13:02:26,064 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 13:02:26,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 12 [2018-10-04 13:02:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 13:02:26,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 13:02:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 13:02:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-04 13:02:26,071 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 114 [2018-10-04 13:02:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:26,071 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-04 13:02:26,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 13:02:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-04 13:02:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 13:02:26,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:26,072 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1] [2018-10-04 13:02:26,072 INFO L423 AbstractCegarLoop]: === Iteration 165 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:02:26,072 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:26,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1768971437, now seen corresponding path program 162 times [2018-10-04 13:02:26,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:26,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:26,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:26,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:26,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:26,221 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:02:26,372 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:26,588 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:26,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:26,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:26,722 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:02:26,811 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-04 13:02:26,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:26,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1540 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:27,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:27,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 13:02:27,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 13:02:27,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 13:02:27,010 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:27,010 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-10-04 13:02:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:27,231 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2018-10-04 13:02:27,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 13:02:27,232 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-04 13:02:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:27,232 INFO L225 Difference]: With dead ends: 119 [2018-10-04 13:02:27,232 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 13:02:27,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 10 [2018-10-04 13:02:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 13:02:27,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-04 13:02:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 13:02:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2018-10-04 13:02:27,240 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 114 [2018-10-04 13:02:27,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:27,240 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2018-10-04 13:02:27,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 13:02:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2018-10-04 13:02:27,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-04 13:02:27,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:27,241 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1] [2018-10-04 13:02:27,241 INFO L423 AbstractCegarLoop]: === Iteration 166 === [MainErr1ASSERT_VIOLATIONASSERT, MainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:02:27,241 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:27,241 INFO L82 PathProgramCache]: Analyzing trace with hash -996521823, now seen corresponding path program 163 times [2018-10-04 13:02:27,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:27,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:27,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:27,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:27,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:27,551 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:02:28,051 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:02:28,782 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:02:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:29,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:29,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:29,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:02:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:29,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:29,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:29,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 13:02:29,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 13:02:29,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 13:02:29,523 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:29,523 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 58 states. Received shutdown request... [2018-10-04 13:02:32,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 13:02:32,326 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 13:02:32,333 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 13:02:32,333 INFO L202 PluginConnector]: Adding new model doubleLoopUniformIterations.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 01:02:32 BoogieIcfgContainer [2018-10-04 13:02:32,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 13:02:32,334 INFO L168 Benchmark]: Toolchain (without parser) took 236558.76 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -158.9 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 292.3 MB). Peak memory consumption was 133.4 MB. Max. memory is 7.1 GB. [2018-10-04 13:02:32,335 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 13:02:32,335 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 13:02:32,336 INFO L168 Benchmark]: Boogie Preprocessor took 25.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 13:02:32,336 INFO L168 Benchmark]: RCFGBuilder took 354.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 13:02:32,337 INFO L168 Benchmark]: TraceAbstraction took 236125.92 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -158.9 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 271.1 MB). Peak memory consumption was 112.3 MB. Max. memory is 7.1 GB. [2018-10-04 13:02:32,339 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 48.29 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 354.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 236125.92 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -158.9 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 271.1 MB). Peak memory consumption was 112.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was constructing difference of abstraction (116states) and FLOYD_HOARE automaton (currently 58 states, 58 states before enhancement), while ReachableStatesComputation was computing reachable states (117 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 23). Cancelled while BasicCegarLoop was constructing difference of abstraction (116states) and FLOYD_HOARE automaton (currently 58 states, 58 states before enhancement), while ReachableStatesComputation was computing reachable states (117 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. TIMEOUT Result, 236.0s OverallTime, 166 OverallIterations, 55 TraceHistogramMax, 98.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 665 SDtfs, 1445 SDslu, 5850 SDs, 0 SdLazy, 149046 SolverSat, 1889 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 78.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19184 GetRequests, 14289 SyntacticMatches, 110 SemanticMatches, 4785 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 114.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=163, 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, 165 MinimizatonAttempts, 1485 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 8.0s SatisfiabilityAnalysisTime, 121.4s InterpolantComputationTime, 19901 NumberOfCodeBlocks, 19901 NumberOfCodeBlocksAsserted, 1544 NumberOfCheckSat, 19572 ConstructedInterpolants, 0 QuantifiedInterpolants, 6474580 SizeOfPredicates, 108 NumberOfNonLiveVariables, 43032 ConjunctsInSsa, 12589 ConjunctsInUnsatCore, 329 InterpolantComputations, 3 PerfectInterpolantSequences, 117037/344957 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/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_13-02-32-349.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/doubleLoopUniformIterations.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_13-02-32-349.csv Completed graceful shutdown