java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:48:43,381 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:48:43,387 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:48:43,401 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:48:43,402 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:48:43,404 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:48:43,407 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:48:43,409 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:48:43,411 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:48:43,412 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:48:43,414 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:48:43,439 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:48:43,470 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:48:43,470 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:48:43,471 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:48:43,471 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:48:43,472 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:48:43,472 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:48:43,472 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:48:43,472 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:48:43,473 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:48:43,473 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:48:43,473 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:48:43,473 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:48:43,473 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:48:43,475 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:48:43,475 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:48:43,475 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:48:43,476 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:48:43,476 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:48:43,476 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:48:43,476 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:48:43,477 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:48:43,478 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:48:43,478 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:48:43,478 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:48:43,478 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:48:43,479 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:48:43,479 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:48:43,479 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:48:43,479 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:48:43,479 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:48:43,523 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:48:43,538 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:48:43,542 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:48:43,543 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:48:43,544 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:48:43,545 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl [2018-09-23 19:48:43,545 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LexIndexValue-Pointer-Reduced.bpl' [2018-09-23 19:48:43,585 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:48:43,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:48:43,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:48:43,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:48:43,589 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:48:43,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:43" (1/1) ... [2018-09-23 19:48:43,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:43" (1/1) ... [2018-09-23 19:48:43,627 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 19:48:43,628 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 19:48:43,628 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 19:48:43,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:48:43,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:48:43,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:48:43,631 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:48:43,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:43" (1/1) ... [2018-09-23 19:48:43,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:43" (1/1) ... [2018-09-23 19:48:43,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:43" (1/1) ... [2018-09-23 19:48:43,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:43" (1/1) ... [2018-09-23 19:48:43,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:43" (1/1) ... [2018-09-23 19:48:43,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:43" (1/1) ... [2018-09-23 19:48:43,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:43" (1/1) ... [2018-09-23 19:48:43,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:48:43,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:48:43,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:48:43,654 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:48:43,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:43" (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 [2018-09-23 19:48:43,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-23 19:48:43,734 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-23 19:48:43,913 INFO L351 CfgBuilder]: Using library mode [2018-09-23 19:48:43,913 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:48:43 BoogieIcfgContainer [2018-09-23 19:48:43,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:48:43,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:48:43,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:48:43,918 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:48:43,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:48:43" (1/2) ... [2018-09-23 19:48:43,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c7d13b and model type LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:48:43, skipping insertion in model container [2018-09-23 19:48:43,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:48:43" (2/2) ... [2018-09-23 19:48:43,921 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-Reduced.bpl [2018-09-23 19:48:43,930 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:48:43,937 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:48:43,982 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:48:43,983 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:48:43,983 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:48:43,983 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:48:43,984 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:48:43,984 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:48:43,984 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:48:43,984 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:48:43,984 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:48:43,999 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-23 19:48:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 19:48:44,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:44,006 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 19:48:44,008 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:44,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:44,014 INFO L82 PathProgramCache]: Analyzing trace with hash 29920, now seen corresponding path program 1 times [2018-09-23 19:48:44,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:44,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:44,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:44,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:44,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:44,166 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:48:44,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-23 19:48:44,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:48:44,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:48:44,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:48:44,186 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-23 19:48:44,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:44,257 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 19:48:44,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:48:44,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 19:48:44,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:44,271 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:48:44,271 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 19:48:44,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:48:44,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 19:48:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 19:48:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 19:48:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 19:48:44,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2018-09-23 19:48:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:44,329 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 19:48:44,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:48:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 19:48:44,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:48:44,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:44,330 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-23 19:48:44,330 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:44,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash 28754210, now seen corresponding path program 1 times [2018-09-23 19:48:44,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:44,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:44,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:44,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:44,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:44,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:44,396 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 [2018-09-23 19:48:44,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:44,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:44,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:44,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-09-23 19:48:44,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:48:44,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:48:44,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:48:44,735 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-23 19:48:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:44,872 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 19:48:44,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:48:44,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-23 19:48:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:44,874 INFO L225 Difference]: With dead ends: 9 [2018-09-23 19:48:44,874 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 19:48:44,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:48:44,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 19:48:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 19:48:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:48:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 19:48:44,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2018-09-23 19:48:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:44,879 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 19:48:44,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:48:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 19:48:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:48:44,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:44,880 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1] [2018-09-23 19:48:44,880 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:44,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1862993124, now seen corresponding path program 2 times [2018-09-23 19:48:44,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:44,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:44,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:44,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:44,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:44,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:44,974 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 [2018-09-23 19:48:44,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:45,018 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:45,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:45,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:45,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:45,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-09-23 19:48:45,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:48:45,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:48:45,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:48:45,205 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-23 19:48:45,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:45,405 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 19:48:45,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:48:45,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-23 19:48:45,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:45,407 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:48:45,408 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 19:48:45,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:48:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 19:48:45,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 19:48:45,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:48:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 19:48:45,412 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-09-23 19:48:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:45,412 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 19:48:45,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:48:45,413 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 19:48:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:48:45,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:45,414 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1] [2018-09-23 19:48:45,414 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:45,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:45,414 INFO L82 PathProgramCache]: Analyzing trace with hash -664969178, now seen corresponding path program 3 times [2018-09-23 19:48:45,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:45,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:45,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:45,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:45,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:45,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:45,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:45,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:45,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 19:48:45,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:45,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:45,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:45,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2018-09-23 19:48:45,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:48:45,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:48:45,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:48:45,682 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-23 19:48:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:45,730 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 19:48:45,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:48:45,731 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-23 19:48:45,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:45,732 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:48:45,732 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 19:48:45,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:48:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 19:48:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 19:48:45,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:48:45,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 19:48:45,737 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-09-23 19:48:45,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:45,737 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 19:48:45,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:48:45,737 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 19:48:45,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:48:45,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:45,738 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2018-09-23 19:48:45,738 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:45,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:45,739 INFO L82 PathProgramCache]: Analyzing trace with hash 914748136, now seen corresponding path program 4 times [2018-09-23 19:48:45,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:45,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:45,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:45,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:45,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:45,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:45,907 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 [2018-09-23 19:48:45,917 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:45,923 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:45,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:45,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:46,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:46,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2018-09-23 19:48:46,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:48:46,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:48:46,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:48:46,091 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-23 19:48:46,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:46,214 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 19:48:46,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:48:46,217 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-23 19:48:46,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:46,217 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:48:46,217 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 19:48:46,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:48:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 19:48:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 19:48:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:48:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 19:48:46,222 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-09-23 19:48:46,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:46,222 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 19:48:46,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:48:46,223 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 19:48:46,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:48:46,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:46,223 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1] [2018-09-23 19:48:46,224 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:46,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:46,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1395335894, now seen corresponding path program 5 times [2018-09-23 19:48:46,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:46,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:46,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:46,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:46,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:46,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:46,585 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 [2018-09-23 19:48:46,604 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:46,674 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:48:46,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:46,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:46,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:46,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-23 19:48:46,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:48:46,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:48:46,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:48:46,786 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-23 19:48:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:46,869 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 19:48:46,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:48:46,871 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-23 19:48:46,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:46,871 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:48:46,872 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 19:48:46,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:48:46,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 19:48:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 19:48:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:48:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 19:48:46,876 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-09-23 19:48:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:46,877 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 19:48:46,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:48:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 19:48:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:48:46,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:46,878 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1] [2018-09-23 19:48:46,878 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:46,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:46,879 INFO L82 PathProgramCache]: Analyzing trace with hash -887996692, now seen corresponding path program 6 times [2018-09-23 19:48:46,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:46,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:46,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:46,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:46,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:47,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:47,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:47,018 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:47,028 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:48:47,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:47,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:47,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:47,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2018-09-23 19:48:47,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:48:47,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:48:47,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:48:47,210 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-23 19:48:47,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:47,272 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 19:48:47,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:48:47,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-23 19:48:47,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:47,274 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:48:47,274 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 19:48:47,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:48:47,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 19:48:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 19:48:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:48:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 19:48:47,279 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-09-23 19:48:47,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:47,279 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 19:48:47,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:48:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 19:48:47,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:48:47,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:47,280 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1] [2018-09-23 19:48:47,280 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:47,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:47,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1333671982, now seen corresponding path program 7 times [2018-09-23 19:48:47,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:47,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:47,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:47,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:47,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:47,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:47,457 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 [2018-09-23 19:48:47,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:47,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:47,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:47,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2018-09-23 19:48:47,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:48:47,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:48:47,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:48:47,793 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-23 19:48:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:47,854 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 19:48:47,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:48:47,854 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-23 19:48:47,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:47,856 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:48:47,856 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 19:48:47,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:48:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 19:48:47,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 19:48:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:48:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 19:48:47,861 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-09-23 19:48:47,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:47,861 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 19:48:47,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:48:47,862 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 19:48:47,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:48:47,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:47,862 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1] [2018-09-23 19:48:47,863 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:47,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:47,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1758521584, now seen corresponding path program 8 times [2018-09-23 19:48:47,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:47,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:47,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:47,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:47,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:48,002 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:48,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:48,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:48,023 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:48,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:48,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:48,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:48,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2018-09-23 19:48:48,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:48:48,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:48:48,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:48:48,208 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-23 19:48:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:48,276 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 19:48:48,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:48:48,277 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-23 19:48:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:48,278 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:48:48,279 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 19:48:48,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:48:48,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 19:48:48,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 19:48:48,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:48:48,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 19:48:48,284 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-09-23 19:48:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:48,285 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 19:48:48,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:48:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 19:48:48,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:48:48,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:48,286 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1] [2018-09-23 19:48:48,286 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:48,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:48,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2017095986, now seen corresponding path program 9 times [2018-09-23 19:48:48,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:48,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:48,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:48,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:48,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:48,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:48,444 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 [2018-09-23 19:48:48,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:48,490 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 19:48:48,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:48,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:48,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:48,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2018-09-23 19:48:48,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:48:48,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:48:48,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:48:48,719 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-23 19:48:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:48,984 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 19:48:48,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:48:48,984 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-23 19:48:48,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:48,985 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:48:48,988 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 19:48:48,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:48:48,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 19:48:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 19:48:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:48:48,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 19:48:48,996 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-09-23 19:48:48,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:48,996 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 19:48:48,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:48:48,996 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 19:48:48,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:48:48,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:48,997 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1] [2018-09-23 19:48:48,998 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:48,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:48,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1398993140, now seen corresponding path program 10 times [2018-09-23 19:48:48,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:48,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:49,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:49,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:49,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:49,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:49,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:49,229 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:49,238 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:49,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:49,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:49,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:49,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2018-09-23 19:48:49,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:48:49,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:48:49,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:48:49,455 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-23 19:48:49,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:49,792 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 19:48:49,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:48:49,793 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-23 19:48:49,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:49,794 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:48:49,794 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 19:48:49,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:48:49,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 19:48:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 19:48:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:48:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 19:48:49,801 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-09-23 19:48:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:49,801 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 19:48:49,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:48:49,802 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 19:48:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 19:48:49,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:49,802 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1] [2018-09-23 19:48:49,803 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:49,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:49,803 INFO L82 PathProgramCache]: Analyzing trace with hash 107644982, now seen corresponding path program 11 times [2018-09-23 19:48:49,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:49,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:49,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:49,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:49,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:49,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:49,992 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 [2018-09-23 19:48:50,004 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:50,025 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 19:48:50,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:50,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:50,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:50,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2018-09-23 19:48:50,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:48:50,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:48:50,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:48:50,518 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-23 19:48:50,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:50,598 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 19:48:50,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:48:50,598 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-23 19:48:50,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:50,599 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:48:50,600 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:48:50,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:48:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:48:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 19:48:50,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:48:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 19:48:50,606 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-09-23 19:48:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:50,606 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 19:48:50,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:48:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 19:48:50,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 19:48:50,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:50,607 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1] [2018-09-23 19:48:50,607 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:50,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:50,608 INFO L82 PathProgramCache]: Analyzing trace with hash 367613688, now seen corresponding path program 12 times [2018-09-23 19:48:50,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:50,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:50,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:50,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:50,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:50,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:50,911 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 [2018-09-23 19:48:50,929 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:50,961 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:48:50,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:50,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:51,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:51,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2018-09-23 19:48:51,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:48:51,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:48:51,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:48:51,189 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-23 19:48:51,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:51,261 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 19:48:51,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:48:51,261 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-23 19:48:51,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:51,262 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:48:51,262 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 19:48:51,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:48:51,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 19:48:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 19:48:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:48:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 19:48:51,268 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2018-09-23 19:48:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:51,269 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 19:48:51,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:48:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 19:48:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:48:51,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:51,270 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1] [2018-09-23 19:48:51,270 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:51,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:51,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1089436986, now seen corresponding path program 13 times [2018-09-23 19:48:51,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:51,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:51,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:51,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:51,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:51,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:51,521 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 [2018-09-23 19:48:51,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:51,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:51,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:51,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2018-09-23 19:48:51,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:48:51,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:48:51,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:48:51,929 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-23 19:48:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:52,013 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 19:48:52,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:48:52,013 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-23 19:48:52,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:52,014 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:48:52,014 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 19:48:52,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:48:52,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 19:48:52,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 19:48:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:48:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 19:48:52,020 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2018-09-23 19:48:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:52,021 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 19:48:52,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:48:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 19:48:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 19:48:52,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:52,022 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1] [2018-09-23 19:48:52,022 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:52,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:52,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1023075588, now seen corresponding path program 14 times [2018-09-23 19:48:52,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:52,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:52,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:52,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:52,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:52,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:52,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:52,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:52,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:52,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:52,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:52,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:52,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2018-09-23 19:48:52,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:48:52,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:48:52,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:48:52,604 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-23 19:48:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:52,695 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 19:48:52,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:48:52,696 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-23 19:48:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:52,697 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:48:52,697 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 19:48:52,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:48:52,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 19:48:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 19:48:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:48:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 19:48:52,703 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2018-09-23 19:48:52,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:52,703 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 19:48:52,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:48:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 19:48:52,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:48:52,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:52,704 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1] [2018-09-23 19:48:52,704 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:52,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash 371871806, now seen corresponding path program 15 times [2018-09-23 19:48:52,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:52,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:52,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:52,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:52,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:52,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:52,952 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 [2018-09-23 19:48:52,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:48:53,148 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 19:48:53,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:53,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:53,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:53,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2018-09-23 19:48:53,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:48:53,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:48:53,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:48:53,541 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-23 19:48:53,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:53,656 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 19:48:53,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:48:53,657 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-23 19:48:53,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:53,658 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:48:53,658 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 19:48:53,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=681, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:48:53,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 19:48:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 19:48:53,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 19:48:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 19:48:53,665 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2018-09-23 19:48:53,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:53,665 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 19:48:53,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:48:53,665 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 19:48:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 19:48:53,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:53,666 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1] [2018-09-23 19:48:53,666 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:53,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:53,667 INFO L82 PathProgramCache]: Analyzing trace with hash 886521088, now seen corresponding path program 16 times [2018-09-23 19:48:53,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:53,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:53,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:53,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:53,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:53,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:53,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:53,865 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:48:53,875 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:48:53,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:53,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:54,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:54,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2018-09-23 19:48:54,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:48:54,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:48:54,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:48:54,184 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-23 19:48:54,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:54,267 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 19:48:54,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:48:54,267 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-23 19:48:54,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:54,268 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:48:54,268 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 19:48:54,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=494, Invalid=766, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:48:54,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 19:48:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 19:48:54,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 19:48:54,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 19:48:54,274 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2018-09-23 19:48:54,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:54,274 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 19:48:54,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:48:54,274 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 19:48:54,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 19:48:54,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:54,275 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1] [2018-09-23 19:48:54,275 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:54,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:54,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1543242050, now seen corresponding path program 17 times [2018-09-23 19:48:54,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:54,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:54,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:54,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:54,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:55,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:55,295 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 [2018-09-23 19:48:55,302 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:48:55,320 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 19:48:55,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:55,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:55,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:55,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2018-09-23 19:48:55,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:48:55,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:48:55,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:48:55,742 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-23 19:48:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:56,067 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 19:48:56,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:48:56,067 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-23 19:48:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:56,068 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:48:56,068 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 19:48:56,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=550, Invalid=856, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:48:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 19:48:56,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 19:48:56,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 19:48:56,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 19:48:56,075 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2018-09-23 19:48:56,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:56,076 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 19:48:56,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:48:56,076 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 19:48:56,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 19:48:56,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:56,077 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1] [2018-09-23 19:48:56,077 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:56,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:56,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1291894020, now seen corresponding path program 18 times [2018-09-23 19:48:56,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:56,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:56,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:56,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:56,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:56,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:56,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:56,653 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:48:56,671 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:48:56,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:56,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:57,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:57,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 38 [2018-09-23 19:48:57,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:48:57,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:48:57,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:48:57,636 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-23 19:48:57,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:57,730 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 19:48:57,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:48:57,731 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-23 19:48:57,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:57,732 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:48:57,732 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 19:48:57,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:48:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 19:48:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 19:48:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 19:48:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 19:48:57,738 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2018-09-23 19:48:57,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:57,738 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 19:48:57,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:48:57,739 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 19:48:57,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 19:48:57,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:57,739 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1] [2018-09-23 19:48:57,740 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:57,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:57,740 INFO L82 PathProgramCache]: Analyzing trace with hash 264605766, now seen corresponding path program 19 times [2018-09-23 19:48:57,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:57,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:57,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:57,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:48:57,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:58,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:58,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:48:58,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:58,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:48:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:58,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:48:58,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2018-09-23 19:48:58,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:48:58,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:48:58,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:48:58,892 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-23 19:48:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:48:59,031 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 19:48:59,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:48:59,031 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-23 19:48:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:48:59,032 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:48:59,032 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 19:48:59,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:48:59,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 19:48:59,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 19:48:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 19:48:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 19:48:59,038 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2018-09-23 19:48:59,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:48:59,038 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 19:48:59,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:48:59,039 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 19:48:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 19:48:59,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:48:59,039 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1] [2018-09-23 19:48:59,040 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:48:59,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:48:59,040 INFO L82 PathProgramCache]: Analyzing trace with hash 883071752, now seen corresponding path program 20 times [2018-09-23 19:48:59,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:48:59,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:48:59,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:59,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:48:59,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:48:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:48:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:48:59,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:48:59,755 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 [2018-09-23 19:48:59,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:48:59,776 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:48:59,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:48:59,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:00,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:00,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 42 [2018-09-23 19:49:00,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:49:00,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:49:00,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:49:00,328 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-23 19:49:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:00,421 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 19:49:00,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:49:00,421 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-23 19:49:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:00,422 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:49:00,422 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 19:49:00,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:49:00,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 19:49:00,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 19:49:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 19:49:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 19:49:00,432 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2018-09-23 19:49:00,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:00,432 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 19:49:00,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:49:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 19:49:00,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 19:49:00,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:00,435 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1] [2018-09-23 19:49:00,435 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:00,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:00,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1771569846, now seen corresponding path program 21 times [2018-09-23 19:49:00,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:00,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:00,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:00,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:00,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:01,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:01,260 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 [2018-09-23 19:49:01,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:01,295 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 19:49:01,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:01,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:01,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:01,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 44 [2018-09-23 19:49:01,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:49:01,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:49:01,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:49:01,684 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-23 19:49:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:01,840 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 19:49:01,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:49:01,842 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-23 19:49:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:01,843 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:49:01,843 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 19:49:01,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=804, Invalid=1266, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:49:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 19:49:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 19:49:01,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 19:49:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 19:49:01,849 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2018-09-23 19:49:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:01,849 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 19:49:01,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:49:01,850 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 19:49:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 19:49:01,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:01,850 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1] [2018-09-23 19:49:01,851 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:01,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:01,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1671571700, now seen corresponding path program 22 times [2018-09-23 19:49:01,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:01,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:01,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:01,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:01,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:02,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:02,214 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 [2018-09-23 19:49:02,227 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:02,241 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:02,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:02,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:02,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:02,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2018-09-23 19:49:02,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:49:02,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:49:02,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:49:02,768 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-23 19:49:02,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:02,862 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 19:49:02,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:49:02,863 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-23 19:49:02,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:02,863 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:49:02,864 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 19:49:02,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=875, Invalid=1381, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:49:02,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 19:49:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 19:49:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 19:49:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 19:49:02,870 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2018-09-23 19:49:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:02,870 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 19:49:02,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:49:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 19:49:02,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 19:49:02,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:02,872 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1] [2018-09-23 19:49:02,872 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:02,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:02,872 INFO L82 PathProgramCache]: Analyzing trace with hash -62633906, now seen corresponding path program 23 times [2018-09-23 19:49:02,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:02,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:02,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:02,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:02,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:03,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:03,276 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 [2018-09-23 19:49:03,285 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:03,305 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 19:49:03,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:03,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:03,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:03,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 48 [2018-09-23 19:49:03,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:49:03,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:49:03,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:49:03,827 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-23 19:49:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:03,981 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 19:49:03,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:49:03,981 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-23 19:49:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:03,982 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:49:03,982 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 19:49:03,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=949, Invalid=1501, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:49:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 19:49:03,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 19:49:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 19:49:03,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 19:49:03,989 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2018-09-23 19:49:03,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:03,989 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 19:49:03,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:49:03,989 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 19:49:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 19:49:03,990 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:03,990 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1] [2018-09-23 19:49:03,990 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:03,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:03,991 INFO L82 PathProgramCache]: Analyzing trace with hash -61640432, now seen corresponding path program 24 times [2018-09-23 19:49:03,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:03,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:03,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:03,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:03,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:04,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:04,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:04,381 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:04,403 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:49:04,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:04,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:04,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:04,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2018-09-23 19:49:04,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:49:04,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:49:04,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:49:04,912 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-23 19:49:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:05,095 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 19:49:05,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:49:05,095 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-23 19:49:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:05,096 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:49:05,096 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 19:49:05,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1026, Invalid=1626, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:49:05,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 19:49:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 19:49:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 19:49:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 19:49:05,099 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2018-09-23 19:49:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:05,100 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 19:49:05,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:49:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 19:49:05,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 19:49:05,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:05,101 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1] [2018-09-23 19:49:05,101 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:05,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:05,101 INFO L82 PathProgramCache]: Analyzing trace with hash 893088082, now seen corresponding path program 25 times [2018-09-23 19:49:05,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:05,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:05,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:05,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:05,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:05,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:05,762 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 [2018-09-23 19:49:05,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:05,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:06,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:06,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 52 [2018-09-23 19:49:06,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:49:06,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:49:06,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:49:06,291 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-23 19:49:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:06,419 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 19:49:06,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:49:06,419 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-23 19:49:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:06,420 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:49:06,420 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 19:49:06,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:49:06,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 19:49:06,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 19:49:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 19:49:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 19:49:06,426 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2018-09-23 19:49:06,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:06,426 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 19:49:06,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:49:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 19:49:06,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 19:49:06,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:06,427 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1] [2018-09-23 19:49:06,427 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:06,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:06,428 INFO L82 PathProgramCache]: Analyzing trace with hash -735811308, now seen corresponding path program 26 times [2018-09-23 19:49:06,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:06,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:06,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:06,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:06,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:06,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:06,905 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 [2018-09-23 19:49:06,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:06,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:06,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:06,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:07,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:07,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 54 [2018-09-23 19:49:07,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:49:07,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:49:07,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:49:07,447 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-23 19:49:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:07,583 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 19:49:07,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:49:07,583 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-23 19:49:07,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:07,584 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:49:07,584 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 19:49:07,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:49:07,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 19:49:07,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 19:49:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 19:49:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 19:49:07,590 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2018-09-23 19:49:07,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:07,590 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 19:49:07,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:49:07,590 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 19:49:07,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 19:49:07,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:07,591 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1] [2018-09-23 19:49:07,591 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:07,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:07,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1554937942, now seen corresponding path program 27 times [2018-09-23 19:49:07,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:07,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:07,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:07,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:07,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:08,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:08,244 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 [2018-09-23 19:49:08,252 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:08,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 19:49:08,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:08,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:08,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:08,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2018-09-23 19:49:08,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:49:08,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:49:08,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:49:08,774 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-23 19:49:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:08,880 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 19:49:08,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:49:08,881 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-23 19:49:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:08,881 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:49:08,882 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 19:49:08,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=2031, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:49:08,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 19:49:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 19:49:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 19:49:08,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 19:49:08,886 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2018-09-23 19:49:08,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:08,886 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 19:49:08,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:49:08,887 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 19:49:08,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 19:49:08,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:08,887 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1] [2018-09-23 19:49:08,887 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:08,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:08,888 INFO L82 PathProgramCache]: Analyzing trace with hash -353255656, now seen corresponding path program 28 times [2018-09-23 19:49:08,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:08,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:08,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:08,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:08,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:09,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:09,328 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 [2018-09-23 19:49:09,344 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:09,380 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:09,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:09,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:10,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:10,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 58 [2018-09-23 19:49:10,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:49:10,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:49:10,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:49:10,725 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-23 19:49:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:10,951 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 19:49:10,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:49:10,951 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-23 19:49:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:10,952 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:49:10,952 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 19:49:10,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1364, Invalid=2176, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:49:10,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 19:49:10,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 19:49:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 19:49:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-23 19:49:10,957 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2018-09-23 19:49:10,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:10,957 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-23 19:49:10,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:49:10,957 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-23 19:49:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 19:49:10,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:10,958 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1] [2018-09-23 19:49:10,958 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:10,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:10,959 INFO L82 PathProgramCache]: Analyzing trace with hash -176267942, now seen corresponding path program 29 times [2018-09-23 19:49:10,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:10,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:10,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:10,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:10,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:11,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:11,448 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 [2018-09-23 19:49:11,456 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:11,482 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-23 19:49:11,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:11,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:12,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:12,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 60 [2018-09-23 19:49:12,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:49:12,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:49:12,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:49:12,074 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-23 19:49:12,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:12,243 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 19:49:12,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:49:12,244 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-23 19:49:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:12,245 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:49:12,245 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 19:49:12,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1456, Invalid=2326, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:49:12,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 19:49:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 19:49:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 19:49:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-23 19:49:12,250 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2018-09-23 19:49:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:12,250 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-23 19:49:12,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:49:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-23 19:49:12,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 19:49:12,251 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:12,251 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1] [2018-09-23 19:49:12,251 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:12,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:12,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1889766628, now seen corresponding path program 30 times [2018-09-23 19:49:12,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:12,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:12,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:12,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:12,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:13,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:13,101 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 [2018-09-23 19:49:13,124 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:13,154 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 19:49:13,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:13,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:13,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:13,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 62 [2018-09-23 19:49:13,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:49:13,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:49:13,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:49:13,792 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-23 19:49:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:13,907 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 19:49:13,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:49:13,907 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-23 19:49:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:13,908 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:49:13,908 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 19:49:13,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1551, Invalid=2481, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:49:13,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 19:49:13,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 19:49:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 19:49:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-23 19:49:13,913 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2018-09-23 19:49:13,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:13,913 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-23 19:49:13,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:49:13,914 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-23 19:49:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 19:49:13,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:13,914 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1] [2018-09-23 19:49:13,915 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:13,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:13,915 INFO L82 PathProgramCache]: Analyzing trace with hash 705437790, now seen corresponding path program 31 times [2018-09-23 19:49:13,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:13,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:13,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:13,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:13,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:14,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:14,574 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 [2018-09-23 19:49:14,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:14,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:15,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:15,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 64 [2018-09-23 19:49:15,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:49:15,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:49:15,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:49:15,418 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-23 19:49:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:15,595 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 19:49:15,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:49:15,596 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-23 19:49:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:15,597 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:49:15,597 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 19:49:15,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1649, Invalid=2641, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:49:15,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 19:49:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 19:49:15,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 19:49:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-23 19:49:15,602 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2018-09-23 19:49:15,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:15,602 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-23 19:49:15,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:49:15,602 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-23 19:49:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 19:49:15,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:15,603 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1] [2018-09-23 19:49:15,603 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:15,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:15,604 INFO L82 PathProgramCache]: Analyzing trace with hash -679115488, now seen corresponding path program 32 times [2018-09-23 19:49:15,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:15,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:15,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:15,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:15,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:16,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:16,214 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 [2018-09-23 19:49:16,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:16,240 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:16,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:16,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:16,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:16,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 66 [2018-09-23 19:49:16,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:49:16,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:49:16,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:49:16,978 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-23 19:49:17,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:17,110 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 19:49:17,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:49:17,111 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-23 19:49:17,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:17,112 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:49:17,112 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 19:49:17,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:49:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 19:49:17,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 19:49:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 19:49:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-23 19:49:17,117 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2018-09-23 19:49:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:17,118 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-23 19:49:17,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:49:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-23 19:49:17,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 19:49:17,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:17,119 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1] [2018-09-23 19:49:17,119 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:17,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:17,119 INFO L82 PathProgramCache]: Analyzing trace with hash 205046114, now seen corresponding path program 33 times [2018-09-23 19:49:17,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:17,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:17,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:17,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:17,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:17,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:17,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:17,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:17,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-23 19:49:17,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:17,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:18,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:18,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 68 [2018-09-23 19:49:18,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:49:18,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:49:18,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:49:18,644 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-23 19:49:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:18,837 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 19:49:18,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:49:18,838 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-23 19:49:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:18,839 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:49:18,839 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 19:49:18,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:49:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 19:49:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 19:49:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 19:49:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-23 19:49:18,843 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2018-09-23 19:49:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:18,843 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-23 19:49:18,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:49:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-23 19:49:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 19:49:18,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:18,844 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1] [2018-09-23 19:49:18,844 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:18,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:18,844 INFO L82 PathProgramCache]: Analyzing trace with hash -519178972, now seen corresponding path program 34 times [2018-09-23 19:49:18,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:18,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:18,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:18,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:18,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:19,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:19,786 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 [2018-09-23 19:49:19,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:19,816 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:19,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:19,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:20,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:20,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 70 [2018-09-23 19:49:20,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:49:20,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:49:20,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:49:20,805 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-23 19:49:21,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:21,013 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 19:49:21,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:49:21,013 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-23 19:49:21,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:21,014 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:49:21,015 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 19:49:21,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1961, Invalid=3151, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:49:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 19:49:21,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 19:49:21,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 19:49:21,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-23 19:49:21,019 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2018-09-23 19:49:21,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:21,020 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-23 19:49:21,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:49:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-23 19:49:21,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 19:49:21,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:21,020 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1] [2018-09-23 19:49:21,021 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:21,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:21,021 INFO L82 PathProgramCache]: Analyzing trace with hash -714784666, now seen corresponding path program 35 times [2018-09-23 19:49:21,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:21,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:21,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:21,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:21,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:21,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:21,783 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 [2018-09-23 19:49:21,789 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:21,823 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-23 19:49:21,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:21,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:22,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:22,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 72 [2018-09-23 19:49:22,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:49:22,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:49:22,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:49:22,662 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-23 19:49:22,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:22,971 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 19:49:22,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:49:22,971 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-23 19:49:22,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:22,972 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:49:22,972 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 19:49:22,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2071, Invalid=3331, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:49:22,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 19:49:22,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 19:49:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 19:49:22,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-23 19:49:22,977 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2018-09-23 19:49:22,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:22,977 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-23 19:49:22,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:49:22,977 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-23 19:49:22,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 19:49:22,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:22,977 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1] [2018-09-23 19:49:22,978 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:22,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:22,978 INFO L82 PathProgramCache]: Analyzing trace with hash 286704424, now seen corresponding path program 36 times [2018-09-23 19:49:22,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:22,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:22,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:22,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:22,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:23,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:23,775 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 [2018-09-23 19:49:23,795 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:23,828 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 19:49:23,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:23,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:24,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:24,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 74 [2018-09-23 19:49:24,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 19:49:24,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 19:49:24,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:49:24,747 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-23 19:49:24,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:24,915 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 19:49:24,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:49:24,915 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-23 19:49:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:24,916 INFO L225 Difference]: With dead ends: 79 [2018-09-23 19:49:24,916 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 19:49:24,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2184, Invalid=3516, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:49:24,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 19:49:24,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 19:49:24,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 19:49:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-23 19:49:24,921 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2018-09-23 19:49:24,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:24,921 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-23 19:49:24,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 19:49:24,921 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-23 19:49:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 19:49:24,922 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:24,922 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1] [2018-09-23 19:49:24,922 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:24,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:24,923 INFO L82 PathProgramCache]: Analyzing trace with hash 645045610, now seen corresponding path program 37 times [2018-09-23 19:49:24,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:24,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:24,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:24,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:24,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:26,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:26,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:49:26,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:26,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:27,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:27,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 76 [2018-09-23 19:49:27,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:49:27,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:49:27,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:49:27,208 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-23 19:49:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:27,361 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 19:49:27,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:49:27,361 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-23 19:49:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:27,362 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:49:27,362 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 19:49:27,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2300, Invalid=3706, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:49:27,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 19:49:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 19:49:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 19:49:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-23 19:49:27,367 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2018-09-23 19:49:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:27,367 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-23 19:49:27,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:49:27,367 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-23 19:49:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 19:49:27,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:27,368 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1] [2018-09-23 19:49:27,368 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:27,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:27,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1413541676, now seen corresponding path program 38 times [2018-09-23 19:49:27,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:27,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:27,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:27,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:27,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:28,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:28,224 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 [2018-09-23 19:49:28,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:28,253 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:28,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:28,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:29,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:29,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 78 [2018-09-23 19:49:29,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 19:49:29,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 19:49:29,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:49:29,141 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-23 19:49:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:29,320 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 19:49:29,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:49:29,321 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-23 19:49:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:29,322 INFO L225 Difference]: With dead ends: 83 [2018-09-23 19:49:29,322 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 19:49:29,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:49:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 19:49:29,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 19:49:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 19:49:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-23 19:49:29,327 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2018-09-23 19:49:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:29,327 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-23 19:49:29,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 19:49:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-23 19:49:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 19:49:29,328 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:29,328 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1] [2018-09-23 19:49:29,328 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:29,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:29,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1203886190, now seen corresponding path program 39 times [2018-09-23 19:49:29,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:29,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:29,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:29,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:29,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:30,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:30,196 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 [2018-09-23 19:49:30,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:30,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-23 19:49:30,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:30,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:31,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:31,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 80 [2018-09-23 19:49:31,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 19:49:31,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 19:49:31,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:49:31,531 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-23 19:49:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:31,708 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 19:49:31,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:49:31,709 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-23 19:49:31,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:31,710 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:49:31,710 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 19:49:31,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:49:31,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 19:49:31,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-23 19:49:31,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 19:49:31,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-23 19:49:31,715 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2018-09-23 19:49:31,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:31,716 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-23 19:49:31,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 19:49:31,716 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-23 19:49:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 19:49:31,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:31,716 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1] [2018-09-23 19:49:31,717 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:31,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:31,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1588427056, now seen corresponding path program 40 times [2018-09-23 19:49:31,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:31,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:31,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:31,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:31,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:32,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:32,655 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 [2018-09-23 19:49:32,663 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:32,687 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:32,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:32,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:33,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:33,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 82 [2018-09-23 19:49:33,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 19:49:33,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 19:49:33,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:49:33,746 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-23 19:49:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:33,913 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 19:49:33,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:49:33,913 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-23 19:49:33,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:33,914 INFO L225 Difference]: With dead ends: 87 [2018-09-23 19:49:33,914 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 19:49:33,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2666, Invalid=4306, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:49:33,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 19:49:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 19:49:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 19:49:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-23 19:49:33,920 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2018-09-23 19:49:33,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:33,920 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-23 19:49:33,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 19:49:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-23 19:49:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-23 19:49:33,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:33,921 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1] [2018-09-23 19:49:33,922 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:33,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:33,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1765011826, now seen corresponding path program 41 times [2018-09-23 19:49:33,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:33,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:33,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:33,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:33,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:34,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:34,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:34,975 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:35,016 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-23 19:49:35,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:35,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:36,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:36,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 84 [2018-09-23 19:49:36,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 19:49:36,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 19:49:36,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:49:36,438 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-23 19:49:36,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:36,619 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 19:49:36,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:49:36,620 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-23 19:49:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:36,621 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:49:36,621 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 19:49:36,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3444 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2794, Invalid=4516, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:49:36,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 19:49:36,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 19:49:36,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 19:49:36,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-23 19:49:36,627 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2018-09-23 19:49:36,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:36,627 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-23 19:49:36,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 19:49:36,627 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-23 19:49:36,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 19:49:36,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:36,628 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1] [2018-09-23 19:49:36,628 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:36,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:36,628 INFO L82 PathProgramCache]: Analyzing trace with hash -335716044, now seen corresponding path program 42 times [2018-09-23 19:49:36,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:36,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:36,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:36,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:36,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:37,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:37,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:37,513 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:37,554 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 19:49:37,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:37,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:38,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:38,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 86 [2018-09-23 19:49:38,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 19:49:38,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 19:49:38,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:49:38,792 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-23 19:49:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:39,002 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 19:49:39,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:49:39,002 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-23 19:49:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:39,004 INFO L225 Difference]: With dead ends: 91 [2018-09-23 19:49:39,004 INFO L226 Difference]: Without dead ends: 90 [2018-09-23 19:49:39,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2925, Invalid=4731, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:49:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-23 19:49:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-23 19:49:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 19:49:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-23 19:49:39,008 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2018-09-23 19:49:39,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:39,008 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-23 19:49:39,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 19:49:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-23 19:49:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 19:49:39,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:39,009 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1] [2018-09-23 19:49:39,009 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:39,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:39,009 INFO L82 PathProgramCache]: Analyzing trace with hash -500569994, now seen corresponding path program 43 times [2018-09-23 19:49:39,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:39,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:39,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:39,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:39,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:41,269 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:41,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:41,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:41,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:42,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:42,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 88 [2018-09-23 19:49:42,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 19:49:42,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 19:49:42,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:49:42,457 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-23 19:49:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:42,623 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 19:49:42,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:49:42,623 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-23 19:49:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:42,624 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:49:42,624 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 19:49:42,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3059, Invalid=4951, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:49:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 19:49:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 19:49:42,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 19:49:42,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-23 19:49:42,628 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2018-09-23 19:49:42,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:42,628 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-23 19:49:42,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 19:49:42,629 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-23 19:49:42,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-23 19:49:42,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:42,629 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1] [2018-09-23 19:49:42,629 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:42,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:42,630 INFO L82 PathProgramCache]: Analyzing trace with hash -11425992, now seen corresponding path program 44 times [2018-09-23 19:49:42,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:42,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:42,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:42,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:42,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:43,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:43,530 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 [2018-09-23 19:49:43,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:43,563 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:43,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:43,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:44,780 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:44,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 90 [2018-09-23 19:49:44,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 19:49:44,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 19:49:44,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:49:44,781 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-23 19:49:44,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:44,957 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 19:49:44,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:49:44,958 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-23 19:49:44,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:44,959 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:49:44,959 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 19:49:44,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:49:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 19:49:44,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 19:49:44,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 19:49:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-23 19:49:44,965 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2018-09-23 19:49:44,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:44,965 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-23 19:49:44,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 19:49:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-23 19:49:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 19:49:44,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:44,966 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1] [2018-09-23 19:49:44,967 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:44,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:44,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1904524666, now seen corresponding path program 45 times [2018-09-23 19:49:44,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:44,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:44,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:44,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:44,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:46,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:46,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:46,385 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:46,496 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-23 19:49:46,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:46,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:47,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:47,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 92 [2018-09-23 19:49:47,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 19:49:47,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 19:49:47,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:49:47,851 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-23 19:49:48,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:48,049 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 19:49:48,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:49:48,049 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-23 19:49:48,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:48,050 INFO L225 Difference]: With dead ends: 97 [2018-09-23 19:49:48,051 INFO L226 Difference]: Without dead ends: 96 [2018-09-23 19:49:48,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:49:48,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-23 19:49:48,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-23 19:49:48,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 19:49:48,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-23 19:49:48,055 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2018-09-23 19:49:48,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:48,056 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-23 19:49:48,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 19:49:48,056 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-23 19:49:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 19:49:48,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:48,056 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1] [2018-09-23 19:49:48,057 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:48,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:48,057 INFO L82 PathProgramCache]: Analyzing trace with hash 592137020, now seen corresponding path program 46 times [2018-09-23 19:49:48,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:48,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:48,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:48,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:48,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:49,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:49,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:49,196 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:49,223 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:49,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:49,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:50,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:50,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 94 [2018-09-23 19:49:50,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 19:49:50,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 19:49:50,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:49:50,552 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-23 19:49:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:50,735 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 19:49:50,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:49:50,735 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-23 19:49:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:50,736 INFO L225 Difference]: With dead ends: 99 [2018-09-23 19:49:50,736 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 19:49:50,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3479, Invalid=5641, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:49:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 19:49:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-23 19:49:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 19:49:50,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-23 19:49:50,742 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2018-09-23 19:49:50,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:50,742 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-23 19:49:50,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 19:49:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-23 19:49:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 19:49:50,743 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:50,743 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1] [2018-09-23 19:49:50,743 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:50,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:50,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2107994238, now seen corresponding path program 47 times [2018-09-23 19:49:50,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:50,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:50,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:50,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:50,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:52,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:52,116 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 [2018-09-23 19:49:52,124 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:52,172 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-23 19:49:52,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:52,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:53,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:53,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 96 [2018-09-23 19:49:53,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 19:49:53,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 19:49:53,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:49:53,692 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-23 19:49:53,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:53,890 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 19:49:53,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:49:53,891 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-23 19:49:53,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:53,892 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:49:53,892 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 19:49:53,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4512 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3625, Invalid=5881, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:49:53,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 19:49:53,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 19:49:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 19:49:53,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-23 19:49:53,897 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2018-09-23 19:49:53,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:53,898 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-23 19:49:53,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 19:49:53,898 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-23 19:49:53,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 19:49:53,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:53,898 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1] [2018-09-23 19:49:53,899 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:53,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:53,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1442099904, now seen corresponding path program 48 times [2018-09-23 19:49:53,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:53,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:53,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:53,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:53,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:55,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:55,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:55,073 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:55,121 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 19:49:55,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:55,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:56,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:56,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 98 [2018-09-23 19:49:56,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 19:49:56,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 19:49:56,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:49:56,815 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-23 19:49:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:57,130 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 19:49:57,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:49:57,131 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-23 19:49:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:57,132 INFO L225 Difference]: With dead ends: 103 [2018-09-23 19:49:57,132 INFO L226 Difference]: Without dead ends: 102 [2018-09-23 19:49:57,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3774, Invalid=6126, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:49:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-23 19:49:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-23 19:49:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 19:49:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-23 19:49:57,136 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2018-09-23 19:49:57,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:57,137 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-23 19:49:57,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 19:49:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-23 19:49:57,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 19:49:57,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:57,137 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1] [2018-09-23 19:49:57,138 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:57,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:57,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1416429954, now seen corresponding path program 49 times [2018-09-23 19:49:57,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:57,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:57,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:57,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:57,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:58,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:58,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:58,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:58,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:01,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:01,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 100 [2018-09-23 19:50:01,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 19:50:01,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 19:50:01,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:50:01,102 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-23 19:50:01,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:01,435 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 19:50:01,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:50:01,435 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-23 19:50:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:01,436 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:50:01,436 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 19:50:01,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3926, Invalid=6376, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:50:01,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 19:50:01,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 19:50:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 19:50:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-23 19:50:01,441 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2018-09-23 19:50:01,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:01,441 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-23 19:50:01,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 19:50:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-23 19:50:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 19:50:01,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:01,442 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1] [2018-09-23 19:50:01,442 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:01,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:01,443 INFO L82 PathProgramCache]: Analyzing trace with hash -315445948, now seen corresponding path program 50 times [2018-09-23 19:50:01,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:01,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:01,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:01,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:01,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:02,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:02,763 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 [2018-09-23 19:50:02,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:02,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:02,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:02,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:04,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:04,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 102 [2018-09-23 19:50:04,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 19:50:04,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 19:50:04,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:50:04,304 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-23 19:50:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:06,361 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-23 19:50:06,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:50:06,361 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-23 19:50:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:06,363 INFO L225 Difference]: With dead ends: 107 [2018-09-23 19:50:06,363 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 19:50:06,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4081, Invalid=6631, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:50:06,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 19:50:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 19:50:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 19:50:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-23 19:50:06,369 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2018-09-23 19:50:06,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:06,369 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-23 19:50:06,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 19:50:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-23 19:50:06,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-23 19:50:06,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:06,372 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1] [2018-09-23 19:50:06,372 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:06,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:06,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1799123078, now seen corresponding path program 51 times [2018-09-23 19:50:06,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:06,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:06,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:06,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:06,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:07,841 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:07,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:07,849 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:07,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-23 19:50:07,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:07,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:09,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:09,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 104 [2018-09-23 19:50:09,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 19:50:09,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 19:50:09,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:50:09,444 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-23 19:50:09,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:09,686 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-23 19:50:09,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:50:09,687 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-23 19:50:09,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:09,688 INFO L225 Difference]: With dead ends: 109 [2018-09-23 19:50:09,688 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 19:50:09,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5304 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4239, Invalid=6891, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:50:09,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 19:50:09,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-23 19:50:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-23 19:50:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-23 19:50:09,695 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2018-09-23 19:50:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:09,695 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-23 19:50:09,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 19:50:09,695 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-23 19:50:09,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 19:50:09,695 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:09,696 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1] [2018-09-23 19:50:09,696 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:09,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:09,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1914541240, now seen corresponding path program 52 times [2018-09-23 19:50:09,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:09,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:09,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:09,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:09,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:10,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:10,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:10,929 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:10,973 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:10,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:10,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:13,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:13,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 106 [2018-09-23 19:50:13,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 19:50:13,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 19:50:13,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:50:13,162 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-23 19:50:13,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:13,375 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-23 19:50:13,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:50:13,375 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-23 19:50:13,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:13,376 INFO L225 Difference]: With dead ends: 111 [2018-09-23 19:50:13,376 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 19:50:13,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4400, Invalid=7156, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:50:13,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 19:50:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-23 19:50:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 19:50:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-23 19:50:13,382 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2018-09-23 19:50:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:13,382 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-23 19:50:13,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 19:50:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-23 19:50:13,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-23 19:50:13,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:13,383 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1] [2018-09-23 19:50:13,383 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:13,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:13,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1628127862, now seen corresponding path program 53 times [2018-09-23 19:50:13,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:13,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:13,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:13,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:13,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:14,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:14,702 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:14,845 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-23 19:50:14,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:14,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:16,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:16,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 108 [2018-09-23 19:50:16,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 19:50:16,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 19:50:16,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:50:16,892 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-23 19:50:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:17,123 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-23 19:50:17,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:50:17,124 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-23 19:50:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:17,125 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:50:17,125 INFO L226 Difference]: Without dead ends: 112 [2018-09-23 19:50:17,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5724 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4564, Invalid=7426, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:50:17,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-23 19:50:17,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-23 19:50:17,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 19:50:17,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-23 19:50:17,129 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2018-09-23 19:50:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:17,130 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-23 19:50:17,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 19:50:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-23 19:50:17,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-23 19:50:17,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:17,130 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1] [2018-09-23 19:50:17,131 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:17,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:17,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1262778548, now seen corresponding path program 54 times [2018-09-23 19:50:17,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:17,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:17,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:17,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:17,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:18,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:18,940 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 [2018-09-23 19:50:18,948 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:19,002 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 19:50:19,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:19,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:20,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:20,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 110 [2018-09-23 19:50:20,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-23 19:50:20,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-23 19:50:20,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 19:50:20,871 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-23 19:50:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:21,178 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-23 19:50:21,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:50:21,179 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-23 19:50:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:21,180 INFO L225 Difference]: With dead ends: 115 [2018-09-23 19:50:21,180 INFO L226 Difference]: Without dead ends: 114 [2018-09-23 19:50:21,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4731, Invalid=7701, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 19:50:21,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-23 19:50:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-23 19:50:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-23 19:50:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-23 19:50:21,185 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2018-09-23 19:50:21,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:21,186 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-23 19:50:21,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-23 19:50:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-23 19:50:21,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 19:50:21,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:21,187 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1] [2018-09-23 19:50:21,187 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:21,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:21,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1945561230, now seen corresponding path program 55 times [2018-09-23 19:50:21,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:21,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:21,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:21,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:21,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:23,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:23,226 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 [2018-09-23 19:50:23,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:23,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:25,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 112 [2018-09-23 19:50:25,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-23 19:50:25,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-23 19:50:25,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:50:25,031 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-23 19:50:25,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:25,435 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-23 19:50:25,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:50:25,435 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-23 19:50:25,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:25,437 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:50:25,437 INFO L226 Difference]: Without dead ends: 116 [2018-09-23 19:50:25,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6160 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4901, Invalid=7981, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:50:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-23 19:50:25,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-23 19:50:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-23 19:50:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-23 19:50:25,443 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2018-09-23 19:50:25,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:25,444 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-23 19:50:25,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-23 19:50:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-23 19:50:25,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-23 19:50:25,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:25,445 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1] [2018-09-23 19:50:25,445 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:25,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:25,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1373569360, now seen corresponding path program 56 times [2018-09-23 19:50:25,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:25,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:25,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:25,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:28,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:28,829 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 [2018-09-23 19:50:28,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:28,869 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:28,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:28,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:30,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:30,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 114 [2018-09-23 19:50:30,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-23 19:50:30,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-23 19:50:30,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 19:50:30,727 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-23 19:50:31,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:31,028 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-23 19:50:31,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:50:31,029 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-23 19:50:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:31,030 INFO L225 Difference]: With dead ends: 119 [2018-09-23 19:50:31,030 INFO L226 Difference]: Without dead ends: 118 [2018-09-23 19:50:31,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6384 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5074, Invalid=8266, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 19:50:31,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-23 19:50:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-23 19:50:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-23 19:50:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-23 19:50:31,036 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2018-09-23 19:50:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:31,036 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-23 19:50:31,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-23 19:50:31,036 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-23 19:50:31,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-23 19:50:31,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:31,037 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1] [2018-09-23 19:50:31,037 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:31,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:31,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1445196178, now seen corresponding path program 57 times [2018-09-23 19:50:31,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:31,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:31,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:31,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:31,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:33,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:33,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:33,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:33,375 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-23 19:50:33,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:33,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:35,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:35,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 116 [2018-09-23 19:50:35,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-23 19:50:35,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-23 19:50:35,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 19:50:35,299 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-23 19:50:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:35,555 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-23 19:50:35,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:50:35,555 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-23 19:50:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:35,556 INFO L225 Difference]: With dead ends: 121 [2018-09-23 19:50:35,557 INFO L226 Difference]: Without dead ends: 120 [2018-09-23 19:50:35,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5250, Invalid=8556, Unknown=0, NotChecked=0, Total=13806 [2018-09-23 19:50:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-23 19:50:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-23 19:50:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-23 19:50:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-23 19:50:35,562 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2018-09-23 19:50:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:35,563 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-23 19:50:35,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-23 19:50:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-23 19:50:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-23 19:50:35,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:35,564 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1] [2018-09-23 19:50:35,564 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:35,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:35,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1559091540, now seen corresponding path program 58 times [2018-09-23 19:50:35,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:35,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:35,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:35,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:35,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:37,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:37,193 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 [2018-09-23 19:50:37,203 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:37,236 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:37,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:37,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:39,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:39,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 118 [2018-09-23 19:50:39,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-23 19:50:39,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-23 19:50:39,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 19:50:39,586 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-23 19:50:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:39,870 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-23 19:50:39,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:50:39,871 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-23 19:50:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:39,872 INFO L225 Difference]: With dead ends: 123 [2018-09-23 19:50:39,872 INFO L226 Difference]: Without dead ends: 122 [2018-09-23 19:50:39,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6844 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5429, Invalid=8851, Unknown=0, NotChecked=0, Total=14280 [2018-09-23 19:50:39,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-23 19:50:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-23 19:50:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-23 19:50:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-23 19:50:39,878 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2018-09-23 19:50:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:39,878 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-23 19:50:39,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-23 19:50:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-23 19:50:39,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-23 19:50:39,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:39,879 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1] [2018-09-23 19:50:39,879 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:39,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:39,880 INFO L82 PathProgramCache]: Analyzing trace with hash -656615274, now seen corresponding path program 59 times [2018-09-23 19:50:39,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:39,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:39,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:39,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:39,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:42,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:42,263 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 [2018-09-23 19:50:42,270 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:42,339 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-23 19:50:42,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:42,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:44,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:44,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 120 [2018-09-23 19:50:44,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-23 19:50:44,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-23 19:50:44,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 19:50:44,551 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-23 19:50:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:44,814 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-23 19:50:44,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:50:44,814 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-23 19:50:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:44,815 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:50:44,815 INFO L226 Difference]: Without dead ends: 124 [2018-09-23 19:50:44,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7080 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5611, Invalid=9151, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 19:50:44,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-23 19:50:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-23 19:50:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-23 19:50:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-23 19:50:44,820 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2018-09-23 19:50:44,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:44,820 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-23 19:50:44,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-23 19:50:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-23 19:50:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-23 19:50:44,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:44,821 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1] [2018-09-23 19:50:44,822 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:44,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:44,822 INFO L82 PathProgramCache]: Analyzing trace with hash 352915288, now seen corresponding path program 60 times [2018-09-23 19:50:44,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:44,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:44,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:44,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:44,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:46,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:46,557 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 [2018-09-23 19:50:46,567 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:46,630 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-23 19:50:46,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:46,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:49,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:49,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 122 [2018-09-23 19:50:49,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-23 19:50:49,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-23 19:50:49,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-23 19:50:49,015 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-23 19:50:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:49,275 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-23 19:50:49,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:50:49,276 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-23 19:50:49,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:49,277 INFO L225 Difference]: With dead ends: 127 [2018-09-23 19:50:49,277 INFO L226 Difference]: Without dead ends: 126 [2018-09-23 19:50:49,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7320 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5796, Invalid=9456, Unknown=0, NotChecked=0, Total=15252 [2018-09-23 19:50:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-23 19:50:49,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-23 19:50:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-23 19:50:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-23 19:50:49,282 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2018-09-23 19:50:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:49,282 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-23 19:50:49,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-23 19:50:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-23 19:50:49,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-23 19:50:49,282 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:49,282 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1] [2018-09-23 19:50:49,283 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:49,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:49,283 INFO L82 PathProgramCache]: Analyzing trace with hash -150823526, now seen corresponding path program 61 times [2018-09-23 19:50:49,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:49,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:49,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:49,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:49,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:50,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:50,951 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 [2018-09-23 19:50:50,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:50,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:53,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:53,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 124 [2018-09-23 19:50:53,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-23 19:50:53,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-23 19:50:53,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-23 19:50:53,501 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-23 19:50:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:53,799 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-23 19:50:53,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:50:53,800 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-23 19:50:53,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:53,801 INFO L225 Difference]: With dead ends: 129 [2018-09-23 19:50:53,801 INFO L226 Difference]: Without dead ends: 128 [2018-09-23 19:50:53,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7564 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5984, Invalid=9766, Unknown=0, NotChecked=0, Total=15750 [2018-09-23 19:50:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-23 19:50:53,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-23 19:50:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-23 19:50:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-23 19:50:53,806 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2018-09-23 19:50:53,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:53,807 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-23 19:50:53,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-23 19:50:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-23 19:50:53,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-23 19:50:53,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:53,808 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1] [2018-09-23 19:50:53,808 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:53,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:53,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1087480668, now seen corresponding path program 62 times [2018-09-23 19:50:53,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:53,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:53,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:53,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:53,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:55,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:55,526 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 [2018-09-23 19:50:55,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:55,568 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:55,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:55,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:58,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:58,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 126 [2018-09-23 19:50:58,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-23 19:50:58,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-23 19:50:58,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-23 19:50:58,149 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-23 19:50:58,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:58,397 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-23 19:50:58,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:50:58,398 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-23 19:50:58,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:58,399 INFO L225 Difference]: With dead ends: 131 [2018-09-23 19:50:58,399 INFO L226 Difference]: Without dead ends: 130 [2018-09-23 19:50:58,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7812 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6175, Invalid=10081, Unknown=0, NotChecked=0, Total=16256 [2018-09-23 19:50:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-23 19:50:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-23 19:50:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-23 19:50:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-23 19:50:58,405 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2018-09-23 19:50:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:58,405 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-23 19:50:58,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-23 19:50:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-23 19:50:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-23 19:50:58,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:58,407 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1] [2018-09-23 19:50:58,407 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:58,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:58,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1391870110, now seen corresponding path program 63 times [2018-09-23 19:50:58,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:58,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:58,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:58,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:58,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:00,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:00,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:00,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:00,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-23 19:51:00,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:00,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:02,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:02,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 128 [2018-09-23 19:51:02,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-23 19:51:02,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-23 19:51:02,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-23 19:51:02,565 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-23 19:51:02,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:02,953 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-23 19:51:02,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:51:02,953 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-23 19:51:02,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:02,954 INFO L225 Difference]: With dead ends: 133 [2018-09-23 19:51:02,954 INFO L226 Difference]: Without dead ends: 132 [2018-09-23 19:51:02,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6369, Invalid=10401, Unknown=0, NotChecked=0, Total=16770 [2018-09-23 19:51:02,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-23 19:51:02,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-23 19:51:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-23 19:51:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-23 19:51:02,960 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2018-09-23 19:51:02,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:02,960 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-23 19:51:02,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-23 19:51:02,960 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-23 19:51:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-23 19:51:02,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:02,961 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1] [2018-09-23 19:51:02,961 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:02,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:02,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1852347744, now seen corresponding path program 64 times [2018-09-23 19:51:02,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:02,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:02,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:02,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:02,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:04,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:04,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:04,789 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:04,829 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:04,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:04,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:07,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:07,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 130 [2018-09-23 19:51:07,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-23 19:51:07,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-23 19:51:07,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-23 19:51:07,243 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-23 19:51:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:07,502 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-23 19:51:07,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:51:07,502 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-23 19:51:07,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:07,504 INFO L225 Difference]: With dead ends: 135 [2018-09-23 19:51:07,504 INFO L226 Difference]: Without dead ends: 134 [2018-09-23 19:51:07,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8320 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6566, Invalid=10726, Unknown=0, NotChecked=0, Total=17292 [2018-09-23 19:51:07,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-23 19:51:07,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-23 19:51:07,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-23 19:51:07,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-23 19:51:07,510 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2018-09-23 19:51:07,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:07,510 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-23 19:51:07,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-23 19:51:07,510 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-23 19:51:07,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-23 19:51:07,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:07,511 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1] [2018-09-23 19:51:07,511 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:07,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1989722530, now seen corresponding path program 65 times [2018-09-23 19:51:07,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:07,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:07,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:07,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:07,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:09,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:09,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:09,611 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:09,685 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-23 19:51:09,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:09,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:12,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:12,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 132 [2018-09-23 19:51:12,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-23 19:51:12,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-23 19:51:12,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 19:51:12,794 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-23 19:51:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:13,234 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-23 19:51:13,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:51:13,235 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-23 19:51:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:13,235 INFO L225 Difference]: With dead ends: 137 [2018-09-23 19:51:13,236 INFO L226 Difference]: Without dead ends: 136 [2018-09-23 19:51:13,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6766, Invalid=11056, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 19:51:13,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-23 19:51:13,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-23 19:51:13,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-23 19:51:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-23 19:51:13,241 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2018-09-23 19:51:13,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:13,241 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-23 19:51:13,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-23 19:51:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-23 19:51:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-23 19:51:13,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:13,242 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1] [2018-09-23 19:51:13,242 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:13,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:13,242 INFO L82 PathProgramCache]: Analyzing trace with hash 862905700, now seen corresponding path program 66 times [2018-09-23 19:51:13,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:13,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:13,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:13,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:13,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:15,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:15,280 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 [2018-09-23 19:51:15,288 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:15,362 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-23 19:51:15,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:15,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:17,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:17,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 134 [2018-09-23 19:51:17,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-23 19:51:17,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-23 19:51:17,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-23 19:51:17,898 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-23 19:51:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:18,322 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-23 19:51:18,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:51:18,323 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-23 19:51:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:18,323 INFO L225 Difference]: With dead ends: 139 [2018-09-23 19:51:18,323 INFO L226 Difference]: Without dead ends: 138 [2018-09-23 19:51:18,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8844 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6969, Invalid=11391, Unknown=0, NotChecked=0, Total=18360 [2018-09-23 19:51:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-23 19:51:18,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-23 19:51:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-23 19:51:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-23 19:51:18,328 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2018-09-23 19:51:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:18,328 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-23 19:51:18,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-23 19:51:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-23 19:51:18,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-23 19:51:18,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:18,329 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1] [2018-09-23 19:51:18,329 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:18,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:18,330 INFO L82 PathProgramCache]: Analyzing trace with hash 323690662, now seen corresponding path program 67 times [2018-09-23 19:51:18,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:18,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:18,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:18,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:18,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:20,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:20,342 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 [2018-09-23 19:51:20,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:20,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:22,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:22,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 136 [2018-09-23 19:51:22,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-23 19:51:22,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-23 19:51:22,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-23 19:51:22,904 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-23 19:51:23,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:23,264 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-23 19:51:23,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:51:23,265 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-23 19:51:23,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:23,265 INFO L225 Difference]: With dead ends: 141 [2018-09-23 19:51:23,266 INFO L226 Difference]: Without dead ends: 140 [2018-09-23 19:51:23,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9112 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7175, Invalid=11731, Unknown=0, NotChecked=0, Total=18906 [2018-09-23 19:51:23,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-23 19:51:23,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-23 19:51:23,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-23 19:51:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-23 19:51:23,270 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2018-09-23 19:51:23,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:23,270 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-23 19:51:23,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-23 19:51:23,271 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-23 19:51:23,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-23 19:51:23,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:23,271 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1] [2018-09-23 19:51:23,271 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:23,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:23,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1829081960, now seen corresponding path program 68 times [2018-09-23 19:51:23,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:23,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:23,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:23,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:23,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:25,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:25,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:25,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:25,472 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:25,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:25,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:28,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:28,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 138 [2018-09-23 19:51:28,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-23 19:51:28,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-23 19:51:28,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-23 19:51:28,042 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-23 19:51:28,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:28,399 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-23 19:51:28,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:51:28,399 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-23 19:51:28,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:28,400 INFO L225 Difference]: With dead ends: 143 [2018-09-23 19:51:28,400 INFO L226 Difference]: Without dead ends: 142 [2018-09-23 19:51:28,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9384 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7384, Invalid=12076, Unknown=0, NotChecked=0, Total=19460 [2018-09-23 19:51:28,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-23 19:51:28,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-23 19:51:28,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-23 19:51:28,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-23 19:51:28,406 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2018-09-23 19:51:28,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:28,406 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-23 19:51:28,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-23 19:51:28,406 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-23 19:51:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-23 19:51:28,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:28,407 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1] [2018-09-23 19:51:28,407 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:28,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:28,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1106140586, now seen corresponding path program 69 times [2018-09-23 19:51:28,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:28,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:28,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:28,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:28,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:30,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:30,564 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 [2018-09-23 19:51:30,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:30,647 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-23 19:51:30,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:30,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:33,285 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:33,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 140 [2018-09-23 19:51:33,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-23 19:51:33,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-23 19:51:33,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 19:51:33,287 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 142 states. [2018-09-23 19:51:33,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:33,810 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-23 19:51:33,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:51:33,811 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 141 [2018-09-23 19:51:33,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:33,812 INFO L225 Difference]: With dead ends: 145 [2018-09-23 19:51:33,812 INFO L226 Difference]: Without dead ends: 144 [2018-09-23 19:51:33,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=7596, Invalid=12426, Unknown=0, NotChecked=0, Total=20022 [2018-09-23 19:51:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-23 19:51:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-23 19:51:33,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-23 19:51:33,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-23 19:51:33,816 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2018-09-23 19:51:33,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:33,816 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-23 19:51:33,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-23 19:51:33,817 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-23 19:51:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-23 19:51:33,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:33,817 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1] [2018-09-23 19:51:33,817 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:33,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:33,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2144182124, now seen corresponding path program 70 times [2018-09-23 19:51:33,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:33,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:33,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:33,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:33,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:36,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:36,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:36,014 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:36,052 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:36,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:36,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:39,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:39,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 142 [2018-09-23 19:51:39,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-23 19:51:39,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-23 19:51:39,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-23 19:51:39,368 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 144 states. [2018-09-23 19:51:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:39,766 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-23 19:51:39,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:51:39,767 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 143 [2018-09-23 19:51:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:39,768 INFO L225 Difference]: With dead ends: 147 [2018-09-23 19:51:39,768 INFO L226 Difference]: Without dead ends: 146 [2018-09-23 19:51:39,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9940 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7811, Invalid=12781, Unknown=0, NotChecked=0, Total=20592 [2018-09-23 19:51:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-23 19:51:39,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-23 19:51:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-23 19:51:39,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-23 19:51:39,774 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2018-09-23 19:51:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:39,774 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-23 19:51:39,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-23 19:51:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-23 19:51:39,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-23 19:51:39,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:39,775 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1] [2018-09-23 19:51:39,775 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:39,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:39,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1025279826, now seen corresponding path program 71 times [2018-09-23 19:51:39,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:39,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:39,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:39,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:39,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:42,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:42,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:42,018 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:42,193 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-23 19:51:42,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:42,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:45,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:45,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 144 [2018-09-23 19:51:45,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-23 19:51:45,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-23 19:51:45,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-23 19:51:45,588 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 146 states. [2018-09-23 19:51:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:45,950 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-23 19:51:45,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:51:45,951 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 145 [2018-09-23 19:51:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:45,952 INFO L225 Difference]: With dead ends: 149 [2018-09-23 19:51:45,952 INFO L226 Difference]: Without dead ends: 148 [2018-09-23 19:51:45,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8029, Invalid=13141, Unknown=0, NotChecked=0, Total=21170 [2018-09-23 19:51:45,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-23 19:51:45,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-23 19:51:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-23 19:51:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-23 19:51:45,958 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2018-09-23 19:51:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:45,958 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-23 19:51:45,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-23 19:51:45,958 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-23 19:51:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-23 19:51:45,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:45,959 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1] [2018-09-23 19:51:45,960 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:45,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:45,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1746400912, now seen corresponding path program 72 times [2018-09-23 19:51:45,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:45,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:45,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:45,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:45,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:48,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:48,345 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 [2018-09-23 19:51:48,352 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:48,450 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-23 19:51:48,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:48,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:51,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:51,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 146 [2018-09-23 19:51:51,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-23 19:51:51,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-23 19:51:51,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-23 19:51:51,671 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 148 states. [2018-09-23 19:51:52,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:52,271 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-23 19:51:52,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:51:52,271 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 147 [2018-09-23 19:51:52,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:52,273 INFO L225 Difference]: With dead ends: 151 [2018-09-23 19:51:52,273 INFO L226 Difference]: Without dead ends: 150 [2018-09-23 19:51:52,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10512 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8250, Invalid=13506, Unknown=0, NotChecked=0, Total=21756 [2018-09-23 19:51:52,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-23 19:51:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-23 19:51:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-23 19:51:52,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-23 19:51:52,280 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2018-09-23 19:51:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:52,280 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-23 19:51:52,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-23 19:51:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-23 19:51:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-23 19:51:52,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:52,281 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1] [2018-09-23 19:51:52,281 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:52,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1040937394, now seen corresponding path program 73 times [2018-09-23 19:51:52,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:52,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:52,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:52,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:52,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:54,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:54,858 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 [2018-09-23 19:51:54,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:54,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:57,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:57,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 148 [2018-09-23 19:51:57,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-23 19:51:57,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-23 19:51:57,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-23 19:51:57,893 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 150 states. [2018-09-23 19:51:58,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:58,263 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-23 19:51:58,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:51:58,264 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 149 [2018-09-23 19:51:58,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:58,265 INFO L225 Difference]: With dead ends: 153 [2018-09-23 19:51:58,265 INFO L226 Difference]: Without dead ends: 152 [2018-09-23 19:51:58,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10804 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8474, Invalid=13876, Unknown=0, NotChecked=0, Total=22350 [2018-09-23 19:51:58,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-23 19:51:58,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-23 19:51:58,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-23 19:51:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-23 19:51:58,270 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2018-09-23 19:51:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:58,271 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-23 19:51:58,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-23 19:51:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-23 19:51:58,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-23 19:51:58,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:58,272 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1] [2018-09-23 19:51:58,272 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:58,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:58,272 INFO L82 PathProgramCache]: Analyzing trace with hash -386543244, now seen corresponding path program 74 times [2018-09-23 19:51:58,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:58,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:58,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:58,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:58,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:00,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:00,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:00,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:00,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:00,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:00,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:04,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:04,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 150 [2018-09-23 19:52:04,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-23 19:52:04,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-23 19:52:04,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-23 19:52:04,067 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 152 states. [2018-09-23 19:52:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:04,550 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-23 19:52:04,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:52:04,551 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 151 [2018-09-23 19:52:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:04,552 INFO L225 Difference]: With dead ends: 155 [2018-09-23 19:52:04,552 INFO L226 Difference]: Without dead ends: 154 [2018-09-23 19:52:04,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11100 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8701, Invalid=14251, Unknown=0, NotChecked=0, Total=22952 [2018-09-23 19:52:04,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-23 19:52:04,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-23 19:52:04,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-23 19:52:04,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-23 19:52:04,556 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2018-09-23 19:52:04,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:04,556 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-23 19:52:04,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-23 19:52:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-23 19:52:04,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-23 19:52:04,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:04,557 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1] [2018-09-23 19:52:04,557 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:04,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:04,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2100868938, now seen corresponding path program 75 times [2018-09-23 19:52:04,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:04,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:04,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:04,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:04,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:06,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:06,974 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 [2018-09-23 19:52:06,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:07,072 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-23 19:52:07,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:07,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:10,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:10,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 152 [2018-09-23 19:52:10,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-23 19:52:10,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-23 19:52:10,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-23 19:52:10,583 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 154 states. [2018-09-23 19:52:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:11,006 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-23 19:52:11,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:52:11,006 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 153 [2018-09-23 19:52:11,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:11,007 INFO L225 Difference]: With dead ends: 157 [2018-09-23 19:52:11,008 INFO L226 Difference]: Without dead ends: 156 [2018-09-23 19:52:11,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11400 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8931, Invalid=14631, Unknown=0, NotChecked=0, Total=23562 [2018-09-23 19:52:11,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-23 19:52:11,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-23 19:52:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-23 19:52:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-23 19:52:11,012 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2018-09-23 19:52:11,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:11,012 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-23 19:52:11,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-23 19:52:11,012 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-23 19:52:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-23 19:52:11,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:11,013 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1] [2018-09-23 19:52:11,013 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:11,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:11,013 INFO L82 PathProgramCache]: Analyzing trace with hash -300419208, now seen corresponding path program 76 times [2018-09-23 19:52:11,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:11,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:11,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:11,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:11,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:13,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:13,561 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 [2018-09-23 19:52:13,568 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:13,614 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:13,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:13,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:17,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:17,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 154 [2018-09-23 19:52:17,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-23 19:52:17,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-23 19:52:17,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-23 19:52:17,165 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 156 states. [2018-09-23 19:52:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:17,502 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-23 19:52:17,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:52:17,502 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 155 [2018-09-23 19:52:17,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:17,503 INFO L225 Difference]: With dead ends: 159 [2018-09-23 19:52:17,504 INFO L226 Difference]: Without dead ends: 158 [2018-09-23 19:52:17,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11704 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9164, Invalid=15016, Unknown=0, NotChecked=0, Total=24180 [2018-09-23 19:52:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-23 19:52:17,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-23 19:52:17,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-23 19:52:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-23 19:52:17,508 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2018-09-23 19:52:17,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:17,509 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-23 19:52:17,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-23 19:52:17,509 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-23 19:52:17,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-23 19:52:17,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:17,509 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1] [2018-09-23 19:52:17,510 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:17,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:17,510 INFO L82 PathProgramCache]: Analyzing trace with hash -940048966, now seen corresponding path program 77 times [2018-09-23 19:52:17,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:17,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:17,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:17,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:17,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:20,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:20,331 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 [2018-09-23 19:52:20,339 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:20,444 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-23 19:52:20,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:20,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:23,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:23,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 156 [2018-09-23 19:52:23,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-23 19:52:23,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-23 19:52:23,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-23 19:52:23,792 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 158 states. [2018-09-23 19:52:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:24,165 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-23 19:52:24,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 19:52:24,166 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 157 [2018-09-23 19:52:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:24,167 INFO L225 Difference]: With dead ends: 161 [2018-09-23 19:52:24,167 INFO L226 Difference]: Without dead ends: 160 [2018-09-23 19:52:24,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9400, Invalid=15406, Unknown=0, NotChecked=0, Total=24806 [2018-09-23 19:52:24,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-23 19:52:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-23 19:52:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-23 19:52:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-23 19:52:24,174 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2018-09-23 19:52:24,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:24,175 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-23 19:52:24,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-23 19:52:24,175 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-23 19:52:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-23 19:52:24,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:24,176 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1] [2018-09-23 19:52:24,176 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:24,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:24,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1443923076, now seen corresponding path program 78 times [2018-09-23 19:52:24,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:24,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:24,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:24,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:24,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:27,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:27,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:27,091 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:27,224 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-23 19:52:27,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:27,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:30,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:30,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 158 [2018-09-23 19:52:30,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-23 19:52:30,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-23 19:52:30,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-23 19:52:30,810 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 160 states. [2018-09-23 19:52:31,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:31,230 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-23 19:52:31,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:52:31,231 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 159 [2018-09-23 19:52:31,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:31,232 INFO L225 Difference]: With dead ends: 163 [2018-09-23 19:52:31,232 INFO L226 Difference]: Without dead ends: 162 [2018-09-23 19:52:31,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12324 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9639, Invalid=15801, Unknown=0, NotChecked=0, Total=25440 [2018-09-23 19:52:31,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-23 19:52:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-23 19:52:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-23 19:52:31,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-23 19:52:31,239 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2018-09-23 19:52:31,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:31,239 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-23 19:52:31,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-23 19:52:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-23 19:52:31,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-23 19:52:31,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:31,240 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1] [2018-09-23 19:52:31,241 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:31,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:31,241 INFO L82 PathProgramCache]: Analyzing trace with hash -335638338, now seen corresponding path program 79 times [2018-09-23 19:52:31,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:31,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:31,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:31,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:31,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:33,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:33,975 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 [2018-09-23 19:52:33,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:34,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:37,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:37,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 160 [2018-09-23 19:52:37,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-23 19:52:37,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-23 19:52:37,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-23 19:52:37,755 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 162 states. [2018-09-23 19:52:38,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:38,146 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-23 19:52:38,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:52:38,146 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 161 [2018-09-23 19:52:38,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:38,147 INFO L225 Difference]: With dead ends: 165 [2018-09-23 19:52:38,147 INFO L226 Difference]: Without dead ends: 164 [2018-09-23 19:52:38,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9881, Invalid=16201, Unknown=0, NotChecked=0, Total=26082 [2018-09-23 19:52:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-23 19:52:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-23 19:52:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-23 19:52:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-23 19:52:38,154 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2018-09-23 19:52:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:38,154 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-23 19:52:38,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-23 19:52:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-23 19:52:38,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-23 19:52:38,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:38,155 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1] [2018-09-23 19:52:38,155 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:38,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:38,156 INFO L82 PathProgramCache]: Analyzing trace with hash -425894528, now seen corresponding path program 80 times [2018-09-23 19:52:38,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:38,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:38,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:38,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:38,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:52:40,379 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:52:40,383 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:52:40,383 INFO L202 PluginConnector]: Adding new model LexIndexValue-Pointer-Reduced.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:52:40 BoogieIcfgContainer [2018-09-23 19:52:40,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:52:40,384 INFO L168 Benchmark]: Toolchain (without parser) took 236799.08 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -118.5 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 183.9 MB). Peak memory consumption was 65.4 MB. Max. memory is 7.1 GB. [2018-09-23 19:52:40,386 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 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. [2018-09-23 19:52:40,386 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.88 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. [2018-09-23 19:52:40,386 INFO L168 Benchmark]: Boogie Preprocessor took 22.47 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. [2018-09-23 19:52:40,386 INFO L168 Benchmark]: RCFGBuilder took 260.24 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: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2018-09-23 19:52:40,387 INFO L168 Benchmark]: TraceAbstraction took 236468.84 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -118.5 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 164.8 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. [2018-09-23 19:52:40,389 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 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.88 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 22.47 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 260.24 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: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 236468.84 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -118.5 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 164.8 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 16). Cancelled while BasicCegarLoop was analyzing trace of length 164 with TraceHistMax 81, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 69 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 236.4s OverallTime, 81 OverallIterations, 81 TraceHistogramMax, 20.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 162 SDtfs, 0 SDslu, 1 SDs, 0 SdLazy, 13221 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9718 GetRequests, 3239 SyntacticMatches, 0 SemanticMatches, 6479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341280 ImplicationChecksByTransitivity, 200.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=80, 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: 0.3s AutomataMinimizationTime, 80 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 205.4s InterpolantComputationTime, 13117 NumberOfCodeBlocks, 13117 NumberOfCodeBlocksAsserted, 1771 NumberOfCheckSat, 12958 ConstructedInterpolants, 0 QuantifiedInterpolants, 8346212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13272 ConjunctsInSsa, 3397 ConjunctsInUnsatCore, 159 InterpolantComputations, 1 PerfectInterpolantSequences, 0/341280 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/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-52-40-399.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LexIndexValue-Pointer-Reduced.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-52-40-399.csv Completed graceful shutdown