java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:58:27,534 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:58:27,537 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:58:27,549 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:58:27,549 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:58:27,550 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:58:27,551 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:58:27,553 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:58:27,555 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:58:27,556 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:58:27,557 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 10:58:27,557 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 10:58:27,558 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 10:58:27,559 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 10:58:27,560 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 10:58:27,561 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 10:58:27,562 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 10:58:27,564 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 10:58:27,566 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 10:58:27,568 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 10:58:27,569 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 10:58:27,570 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 10:58:27,572 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 10:58:27,581 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 10:58:27,596 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:58:27,596 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:58:27,597 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:58:27,597 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:58:27,598 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:58:27,598 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:58:27,598 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:58:27,598 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:58:27,598 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:58:27,599 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:58:27,599 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:58:27,599 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:58:27,599 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:58:27,599 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:58:27,600 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:58:27,600 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:58:27,600 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:58:27,600 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:58:27,600 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:58:27,601 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:58:27,601 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:58:27,601 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:58:27,601 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:58:27,601 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:58:27,602 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:58:27,602 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:58:27,602 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:58:27,602 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:58:27,602 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:58:27,603 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:58:27,603 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 10:58:27,649 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:58:27,665 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:58:27,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:58:27,673 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:58:27,673 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:58:27,674 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl [2018-09-30 10:58:27,674 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl' [2018-09-30 10:58:27,723 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:58:27,727 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:58:27,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:58:27,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:58:27,730 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:58:27,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:58:27" (1/1) ... [2018-09-30 10:58:27,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:58:27" (1/1) ... [2018-09-30 10:58:27,768 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 10:58:27,768 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 10:58:27,769 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 10:58:27,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:58:27,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:58:27,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:58:27,772 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:58:27,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:58:27" (1/1) ... [2018-09-30 10:58:27,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:58:27" (1/1) ... [2018-09-30 10:58:27,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:58:27" (1/1) ... [2018-09-30 10:58:27,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:58:27" (1/1) ... [2018-09-30 10:58:27,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:58:27" (1/1) ... [2018-09-30 10:58:27,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:58:27" (1/1) ... [2018-09-30 10:58:27,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:58:27" (1/1) ... [2018-09-30 10:58:27,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:58:27,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:58:27,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:58:27,796 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:58:27,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:58:27" (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 [2018-09-30 10:58:27,870 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 10:58:27,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 10:58:27,871 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 10:58:28,135 INFO L345 CfgBuilder]: Using library mode [2018-09-30 10:58:28,135 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:58:28 BoogieIcfgContainer [2018-09-30 10:58:28,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:58:28,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:58:28,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:58:28,141 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:58:28,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:58:27" (1/2) ... [2018-09-30 10:58:28,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f09f57a and model type Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:58:28, skipping insertion in model container [2018-09-30 10:58:28,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:58:28" (2/2) ... [2018-09-30 10:58:28,145 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-sophisticated.bpl [2018-09-30 10:58:28,154 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:58:28,162 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:58:28,208 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:58:28,209 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:58:28,209 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:58:28,210 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:58:28,210 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:58:28,210 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:58:28,210 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:58:28,210 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:58:28,211 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:58:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 10:58:28,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:58:28,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:28,242 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:58:28,244 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:28,251 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:28,252 INFO L82 PathProgramCache]: Analyzing trace with hash 30240, now seen corresponding path program 1 times [2018-09-30 10:58:28,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:28,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:28,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:28,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:28,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:28,392 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:58:28,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:58:28,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:58:28,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:58:28,410 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:28,412 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 10:58:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:28,649 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2018-09-30 10:58:28,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:58:28,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 10:58:28,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:28,664 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:58:28,664 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:58:28,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:58:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-30 10:58:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 10:58:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-30 10:58:28,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-30 10:58:28,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:28,697 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-30 10:58:28,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:58:28,697 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-30 10:58:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:58:28,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:28,698 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 10:58:28,698 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:28,698 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:28,698 INFO L82 PathProgramCache]: Analyzing trace with hash 28755491, now seen corresponding path program 1 times [2018-09-30 10:58:28,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:28,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:28,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:28,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:28,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:28,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:28,769 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 [2018-09-30 10:58:28,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:28,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:28,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:28,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:58:28,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:58:28,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:58:28,874 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:28,874 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-09-30 10:58:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:28,954 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-30 10:58:28,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:58:28,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-30 10:58:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:28,956 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:58:28,956 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:58:28,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:58:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-09-30 10:58:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:58:28,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-30 10:58:28,961 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-30 10:58:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:28,961 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-30 10:58:28,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:58:28,961 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-30 10:58:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:58:28,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:28,962 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 10:58:28,962 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:28,962 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:28,962 INFO L82 PathProgramCache]: Analyzing trace with hash 28757413, now seen corresponding path program 1 times [2018-09-30 10:58:28,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:28,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:28,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:28,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:28,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:28,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:28,988 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 [2018-09-30 10:58:29,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:29,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:29,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:29,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:58:29,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:58:29,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:58:29,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:29,087 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-30 10:58:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:29,353 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2018-09-30 10:58:29,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:58:29,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-30 10:58:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:29,355 INFO L225 Difference]: With dead ends: 12 [2018-09-30 10:58:29,355 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:58:29,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:58:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-09-30 10:58:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:58:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-30 10:58:29,358 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-30 10:58:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:29,359 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-30 10:58:29,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:58:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-30 10:58:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:58:29,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:29,360 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-30 10:58:29,360 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:29,360 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:29,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1863917926, now seen corresponding path program 2 times [2018-09-30 10:58:29,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:29,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:29,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:29,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:29,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:29,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:29,462 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 [2018-09-30 10:58:29,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:29,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:29,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:29,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:29,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:29,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:58:29,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:58:29,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:58:29,588 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:29,589 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-09-30 10:58:29,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:29,674 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-30 10:58:29,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:58:29,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 10:58:29,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:29,676 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:58:29,677 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:58:29,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:29,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:58:29,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-30 10:58:29,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:58:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-30 10:58:29,681 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-30 10:58:29,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:29,681 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-30 10:58:29,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:58:29,682 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-30 10:58:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:58:29,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:29,682 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-30 10:58:29,683 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:29,683 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:29,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1863919848, now seen corresponding path program 1 times [2018-09-30 10:58:29,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:29,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:29,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:29,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:29,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:29,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:29,804 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 [2018-09-30 10:58:29,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:29,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:29,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:29,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:58:29,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:58:29,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:58:29,904 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:29,904 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-30 10:58:29,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:29,991 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-30 10:58:29,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:58:29,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 10:58:29,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:29,993 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:58:29,993 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:58:29,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:29,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:58:29,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-30 10:58:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:58:29,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-30 10:58:29,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-30 10:58:29,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:29,998 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-30 10:58:29,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:58:29,999 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-30 10:58:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:58:29,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:29,999 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-30 10:58:30,000 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:30,000 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:30,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1865764968, now seen corresponding path program 2 times [2018-09-30 10:58:30,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:30,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:30,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:30,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:30,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:30,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:30,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:30,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:30,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:30,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:30,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:30,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:30,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:58:30,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:58:30,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:58:30,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:30,140 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-30 10:58:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:30,505 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-30 10:58:30,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:58:30,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 10:58:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:30,507 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:58:30,507 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:58:30,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:30,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:58:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-09-30 10:58:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:58:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 10:58:30,512 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2018-09-30 10:58:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:30,512 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 10:58:30,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:58:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 10:58:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:58:30,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:30,513 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-30 10:58:30,514 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:30,515 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:30,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1865766890, now seen corresponding path program 2 times [2018-09-30 10:58:30,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:30,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:30,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:30,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:30,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:30,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:30,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:30,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:30,630 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:30,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:30,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:30,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:30,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:58:30,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:58:30,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:58:30,693 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:30,694 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 5 states. [2018-09-30 10:58:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:30,782 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2018-09-30 10:58:30,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:58:30,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 10:58:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:30,785 INFO L225 Difference]: With dead ends: 16 [2018-09-30 10:58:30,785 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:58:30,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:58:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-09-30 10:58:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:58:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-30 10:58:30,789 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-30 10:58:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:30,790 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-30 10:58:30,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:58:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-30 10:58:30,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:58:30,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:30,791 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-30 10:58:30,791 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:30,791 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:30,791 INFO L82 PathProgramCache]: Analyzing trace with hash 223459305, now seen corresponding path program 3 times [2018-09-30 10:58:30,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:30,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:30,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:30,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:30,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:30,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:30,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:30,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:30,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:58:30,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:30,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:30,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:30,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:58:30,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:58:30,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:58:30,998 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:30,998 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2018-09-30 10:58:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:31,081 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-30 10:58:31,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:58:31,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:58:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:31,083 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:58:31,083 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:58:31,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:31,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:58:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-30 10:58:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:58:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 10:58:31,090 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-30 10:58:31,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:31,090 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 10:58:31,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:58:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 10:58:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:58:31,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:31,091 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 10:58:31,091 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:31,091 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:31,092 INFO L82 PathProgramCache]: Analyzing trace with hash 223461227, now seen corresponding path program 3 times [2018-09-30 10:58:31,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:31,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:31,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:31,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:31,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:31,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:31,148 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 [2018-09-30 10:58:31,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:31,186 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:58:31,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:31,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:31,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:31,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:58:31,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:58:31,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:58:31,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:31,238 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-30 10:58:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:31,381 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-30 10:58:31,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:58:31,382 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:58:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:31,383 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:58:31,383 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:58:31,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:58:31,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-30 10:58:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:58:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 10:58:31,389 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-30 10:58:31,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:31,389 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 10:58:31,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:58:31,389 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 10:58:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:58:31,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:31,390 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 10:58:31,390 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:31,391 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:31,391 INFO L82 PathProgramCache]: Analyzing trace with hash 225306347, now seen corresponding path program 4 times [2018-09-30 10:58:31,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:31,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:31,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:31,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:31,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:31,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:31,446 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 [2018-09-30 10:58:31,456 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:31,463 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:31,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:31,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:31,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:31,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:58:31,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:58:31,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:58:31,516 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:31,516 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-30 10:58:31,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:31,659 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-30 10:58:31,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:58:31,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:58:31,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:31,661 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:58:31,661 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:58:31,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:58:31,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-30 10:58:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:58:31,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 10:58:31,666 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-30 10:58:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:31,666 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 10:58:31,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:58:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 10:58:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:58:31,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:31,667 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 10:58:31,667 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:31,667 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:31,668 INFO L82 PathProgramCache]: Analyzing trace with hash 225308269, now seen corresponding path program 5 times [2018-09-30 10:58:31,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:31,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:31,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:31,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:31,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:31,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:31,711 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 [2018-09-30 10:58:31,721 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:31,728 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 10:58:31,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:31,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:31,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:31,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:58:31,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:58:31,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:58:31,797 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:31,797 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-30 10:58:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:31,872 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-30 10:58:31,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:58:31,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:58:31,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:31,873 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:58:31,873 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:58:31,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:31,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:58:31,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-30 10:58:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:58:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 10:58:31,879 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-30 10:58:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:31,880 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 10:58:31,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:58:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 10:58:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:58:31,880 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:31,881 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 10:58:31,881 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:31,881 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:31,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1998466667, now seen corresponding path program 6 times [2018-09-30 10:58:31,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:31,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:31,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:31,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:31,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:31,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:31,938 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 [2018-09-30 10:58:31,947 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:31,952 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 10:58:31,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:31,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:32,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:32,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:58:32,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:58:32,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:58:32,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:32,024 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-30 10:58:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:32,097 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 10:58:32,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:58:32,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:58:32,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:32,099 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:58:32,099 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:58:32,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:58:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-09-30 10:58:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:58:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:58:32,107 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-30 10:58:32,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:32,107 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:58:32,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:58:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:58:32,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:58:32,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:32,108 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 10:58:32,109 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:32,109 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:32,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1998468589, now seen corresponding path program 7 times [2018-09-30 10:58:32,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:32,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:32,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:32,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:32,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:32,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:32,261 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 [2018-09-30 10:58:32,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:32,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:32,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:32,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:58:32,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:58:32,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:58:32,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:32,333 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-30 10:58:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:32,405 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 10:58:32,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:58:32,405 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:58:32,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:32,406 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:58:32,407 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:58:32,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:58:32,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2018-09-30 10:58:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:58:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 10:58:32,414 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-30 10:58:32,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:32,414 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 10:58:32,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:58:32,415 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 10:58:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:58:32,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:32,415 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 10:58:32,416 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:32,416 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:32,416 INFO L82 PathProgramCache]: Analyzing trace with hash 2000313709, now seen corresponding path program 8 times [2018-09-30 10:58:32,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:32,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:32,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:32,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:32,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:32,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:32,477 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 [2018-09-30 10:58:32,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:32,492 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:32,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:32,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:32,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:32,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:58:32,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:58:32,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:58:32,540 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:32,540 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-30 10:58:32,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:32,621 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2018-09-30 10:58:32,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:58:32,625 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:58:32,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:32,625 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:58:32,625 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:58:32,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:32,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:58:32,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-09-30 10:58:32,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:58:32,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:58:32,631 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-30 10:58:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:32,632 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:58:32,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:58:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:58:32,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:58:32,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:32,633 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-30 10:58:32,633 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:32,633 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:32,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2000315631, now seen corresponding path program 3 times [2018-09-30 10:58:32,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:32,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:32,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:32,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:32,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:32,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:32,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:32,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:32,701 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:58:32,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:32,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:32,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:32,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:58:32,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:58:32,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:58:32,744 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:32,744 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-30 10:58:32,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:32,814 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2018-09-30 10:58:32,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:58:32,816 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 10:58:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:32,817 INFO L225 Difference]: With dead ends: 20 [2018-09-30 10:58:32,817 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:58:32,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:58:32,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-09-30 10:58:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:58:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 10:58:32,822 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-30 10:58:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:32,822 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 10:58:32,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:58:32,823 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 10:58:32,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:32,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:32,823 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-30 10:58:32,824 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:32,824 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:32,824 INFO L82 PathProgramCache]: Analyzing trace with hash -4277844, now seen corresponding path program 4 times [2018-09-30 10:58:32,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:32,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:32,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:32,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:32,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:32,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:32,910 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 [2018-09-30 10:58:32,920 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:32,928 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:32,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:32,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:33,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:33,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:33,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:33,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:33,032 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:33,033 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 7 states. [2018-09-30 10:58:33,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:33,133 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 10:58:33,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:33,134 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:33,135 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:58:33,135 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:58:33,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:33,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:58:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-30 10:58:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:58:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:58:33,143 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 10:58:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:33,143 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:58:33,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:58:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:33,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:33,144 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:58:33,144 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:33,145 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:33,145 INFO L82 PathProgramCache]: Analyzing trace with hash -4275922, now seen corresponding path program 9 times [2018-09-30 10:58:33,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:33,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:33,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:33,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:33,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:33,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:33,209 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 [2018-09-30 10:58:33,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:33,223 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 10:58:33,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:33,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:33,285 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:33,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:33,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:33,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:33,286 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:33,286 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 10:58:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:33,402 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 10:58:33,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:33,402 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:33,403 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:58:33,403 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:58:33,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:33,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:58:33,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-30 10:58:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:58:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:58:33,412 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-30 10:58:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:33,412 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:58:33,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:58:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:33,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:33,413 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:58:33,413 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:33,414 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:33,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2430802, now seen corresponding path program 10 times [2018-09-30 10:58:33,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:33,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:33,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:33,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:33,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:33,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:33,523 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 [2018-09-30 10:58:33,546 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:33,554 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:33,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:33,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:33,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:33,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:33,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:33,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:33,614 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:33,614 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-30 10:58:33,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:33,713 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 10:58:33,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:33,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:33,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:33,714 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:58:33,715 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:58:33,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:33,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:58:33,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-30 10:58:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:58:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:58:33,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 10:58:33,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:33,724 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:58:33,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:33,724 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:58:33,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:33,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:33,724 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 10:58:33,725 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:33,725 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:33,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2428880, now seen corresponding path program 11 times [2018-09-30 10:58:33,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:33,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:33,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:33,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:33,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:33,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:33,835 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 [2018-09-30 10:58:33,846 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:33,854 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 10:58:33,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:33,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:33,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:33,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:33,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:33,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:33,906 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:33,906 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 10:58:34,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:34,175 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-30 10:58:34,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:34,175 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:34,176 INFO L225 Difference]: With dead ends: 22 [2018-09-30 10:58:34,176 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:58:34,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:34,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:58:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-30 10:58:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:58:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 10:58:34,182 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-30 10:58:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:34,182 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 10:58:34,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 10:58:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:34,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:34,183 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:58:34,183 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:34,184 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:34,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1770729518, now seen corresponding path program 12 times [2018-09-30 10:58:34,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:34,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:34,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:34,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:34,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:34,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:34,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:34,231 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:34,237 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 10:58:34,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:34,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:34,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:34,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:34,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:34,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:34,293 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:34,293 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-30 10:58:34,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:34,398 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 10:58:34,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:34,398 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:34,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:34,399 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:58:34,399 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:58:34,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:58:34,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-30 10:58:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:58:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:58:34,408 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 10:58:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:34,409 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:58:34,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:58:34,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:34,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:34,409 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 10:58:34,410 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:34,410 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:34,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1770731440, now seen corresponding path program 13 times [2018-09-30 10:58:34,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:34,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:34,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:34,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:34,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:34,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:34,459 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 [2018-09-30 10:58:34,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:34,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:34,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:34,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:34,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:34,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:34,565 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:34,565 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 10:58:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:34,785 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 10:58:34,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:34,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:34,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:34,786 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:58:34,786 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:58:34,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:34,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:58:34,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-30 10:58:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:58:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:58:34,794 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-30 10:58:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:34,794 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:58:34,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:58:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:34,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:34,795 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 10:58:34,795 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:34,796 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:34,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1772576560, now seen corresponding path program 14 times [2018-09-30 10:58:34,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:34,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:34,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:34,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:34,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:34,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:34,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:34,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:34,968 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:34,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:34,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:35,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:35,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:35,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:35,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:35,021 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:35,021 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-30 10:58:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:35,262 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 10:58:35,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:35,268 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:35,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:35,268 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:58:35,268 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:58:35,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:58:35,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-30 10:58:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:58:35,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:58:35,278 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 10:58:35,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:35,279 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:58:35,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:35,279 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:58:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:35,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:35,279 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:58:35,280 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:35,280 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:35,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578482, now seen corresponding path program 15 times [2018-09-30 10:58:35,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:35,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:35,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:35,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:35,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:35,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:35,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:35,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:35,346 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 10:58:35,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:35,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:35,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:35,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:35,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:35,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:35,398 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:35,398 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 10:58:35,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:35,535 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-30 10:58:35,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:35,536 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:35,537 INFO L225 Difference]: With dead ends: 22 [2018-09-30 10:58:35,537 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:58:35,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:58:35,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-30 10:58:35,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:58:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 10:58:35,544 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-30 10:58:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:35,545 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 10:58:35,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:35,545 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 10:58:35,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:35,545 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:35,546 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:58:35,546 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:35,546 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:35,546 INFO L82 PathProgramCache]: Analyzing trace with hash 675780526, now seen corresponding path program 16 times [2018-09-30 10:58:35,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:35,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:35,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:35,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:35,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:35,639 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:35,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:35,648 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:35,674 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:35,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:35,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:35,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:35,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:35,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:35,730 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:35,730 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-30 10:58:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:35,807 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:58:35,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:35,808 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:35,809 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:58:35,809 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:58:35,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:58:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 10:58:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:58:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:58:35,817 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 10:58:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:35,818 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:58:35,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:58:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:35,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:35,818 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 10:58:35,819 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:35,819 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:35,819 INFO L82 PathProgramCache]: Analyzing trace with hash 675782448, now seen corresponding path program 17 times [2018-09-30 10:58:35,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:35,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:35,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:35,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:35,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:35,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:35,859 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 [2018-09-30 10:58:35,869 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:35,875 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 10:58:35,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:35,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:35,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:35,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:35,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:35,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:35,927 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:35,928 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 10:58:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:36,003 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 10:58:36,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:36,004 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:36,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:36,004 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:58:36,005 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:58:36,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:36,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:58:36,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2018-09-30 10:58:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:58:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:58:36,014 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 10:58:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:36,015 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:58:36,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:58:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:36,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:36,016 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 10:58:36,016 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:36,016 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:36,016 INFO L82 PathProgramCache]: Analyzing trace with hash 677627568, now seen corresponding path program 18 times [2018-09-30 10:58:36,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:36,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:36,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:36,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:36,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:36,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:36,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:36,076 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:36,088 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 10:58:36,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:36,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:36,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:36,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:36,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:36,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:36,183 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:36,183 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 10:58:36,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:36,511 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:58:36,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:36,512 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:36,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:36,513 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:58:36,513 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:58:36,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:36,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:58:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 10:58:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:58:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:58:36,524 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 10:58:36,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:36,525 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:58:36,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:58:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:36,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:36,526 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:58:36,526 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:36,526 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:36,526 INFO L82 PathProgramCache]: Analyzing trace with hash 677629490, now seen corresponding path program 19 times [2018-09-30 10:58:36,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:36,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:36,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:36,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:36,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:36,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:36,597 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 [2018-09-30 10:58:36,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:36,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:36,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:36,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:36,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:36,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:36,702 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:36,702 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 10:58:36,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:36,928 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 10:58:36,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:36,929 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:36,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:36,929 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:58:36,930 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:58:36,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:58:36,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2018-09-30 10:58:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:58:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:58:36,937 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-30 10:58:36,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:36,937 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:58:36,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:58:36,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:36,937 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:36,938 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 10:58:36,938 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:36,938 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:36,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1844179408, now seen corresponding path program 20 times [2018-09-30 10:58:36,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:36,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:36,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:36,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:36,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:36,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:36,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:36,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:36,988 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:36,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:36,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:37,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:37,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:37,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:37,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:37,035 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:37,035 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-30 10:58:37,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:37,126 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 10:58:37,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:37,127 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:37,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:37,127 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:58:37,127 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:58:37,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:37,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:58:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-09-30 10:58:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:58:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:58:37,137 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 10:58:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:37,137 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:58:37,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:58:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:37,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:37,138 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:58:37,138 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:37,138 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:37,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1844177486, now seen corresponding path program 21 times [2018-09-30 10:58:37,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:37,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:37,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:37,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:37,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:37,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:37,165 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 [2018-09-30 10:58:37,173 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:37,188 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 10:58:37,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:37,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:37,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:37,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:37,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:37,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:37,236 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:37,236 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 10:58:37,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:37,354 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 10:58:37,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:37,354 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:37,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:37,355 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:58:37,355 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:58:37,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:37,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:58:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2018-09-30 10:58:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:58:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:58:37,366 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 10:58:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:37,366 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:58:37,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:58:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:37,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:37,367 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 10:58:37,367 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:37,367 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:37,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1842332366, now seen corresponding path program 22 times [2018-09-30 10:58:37,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:37,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:37,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:37,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:37,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:37,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:37,402 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 [2018-09-30 10:58:37,411 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:37,417 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:37,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:37,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:37,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:37,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:37,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:37,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:37,456 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:37,457 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 10:58:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:37,598 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 10:58:37,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:37,598 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:37,599 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:58:37,599 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:58:37,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:58:37,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-09-30 10:58:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:58:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:58:37,612 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 10:58:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:37,612 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:58:37,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:58:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:58:37,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:37,613 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-30 10:58:37,613 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:37,614 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:37,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1842330444, now seen corresponding path program 4 times [2018-09-30 10:58:37,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:37,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:37,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:37,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:37,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:37,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:37,666 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 [2018-09-30 10:58:37,674 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:37,703 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:37,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:37,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:37,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:37,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:58:37,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:58:37,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:58:37,761 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:37,761 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 10:58:37,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:37,952 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2018-09-30 10:58:37,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:58:37,953 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 10:58:37,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:37,953 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:58:37,953 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:58:37,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:37,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:58:37,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-09-30 10:58:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:58:37,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 10:58:37,960 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-30 10:58:37,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:37,961 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 10:58:37,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:58:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 10:58:37,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:37,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:37,961 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-30 10:58:37,962 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:37,962 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:37,962 INFO L82 PathProgramCache]: Analyzing trace with hash 183654063, now seen corresponding path program 5 times [2018-09-30 10:58:37,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:37,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:37,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:37,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:37,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:38,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:38,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:38,017 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:38,089 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:58:38,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:38,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:38,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:38,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:38,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:38,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:38,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:38,322 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 8 states. [2018-09-30 10:58:38,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:38,404 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:58:38,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:38,404 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:38,405 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:58:38,405 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:58:38,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:58:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 10:58:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:38,417 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:58:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:38,418 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:38,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:38,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:38,418 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:58:38,419 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:38,419 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:38,419 INFO L82 PathProgramCache]: Analyzing trace with hash 183655985, now seen corresponding path program 23 times [2018-09-30 10:58:38,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:38,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:38,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:38,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:38,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:38,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:38,472 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 [2018-09-30 10:58:38,479 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:38,486 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:58:38,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:38,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:38,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:38,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:38,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:38,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:38,554 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:38,554 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:58:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:38,655 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:58:38,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:38,656 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:38,656 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:58:38,656 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:58:38,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:38,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:58:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 10:58:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:58:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:58:38,669 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 10:58:38,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:38,670 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:58:38,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:38,670 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:58:38,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:38,670 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:38,670 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:58:38,671 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:38,671 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:38,671 INFO L82 PathProgramCache]: Analyzing trace with hash 185501105, now seen corresponding path program 24 times [2018-09-30 10:58:38,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:38,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:38,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:38,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:38,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:38,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:38,723 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 [2018-09-30 10:58:38,731 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:38,741 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 10:58:38,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:38,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:38,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:38,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:38,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:38,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:38,798 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:38,798 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 10:58:38,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:38,933 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:58:38,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:38,934 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:38,935 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:58:38,935 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:58:38,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:38,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:58:38,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 10:58:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:38,948 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:58:38,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:38,949 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:38,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:38,949 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:38,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:38,949 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:38,950 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:38,950 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:38,950 INFO L82 PathProgramCache]: Analyzing trace with hash 185503027, now seen corresponding path program 25 times [2018-09-30 10:58:38,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:38,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:38,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:38,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:38,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:38,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:38,996 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 [2018-09-30 10:58:39,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:39,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:39,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:39,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:39,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:39,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:39,079 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:39,079 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:58:39,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:39,180 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:58:39,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:39,181 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:39,181 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:58:39,182 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:58:39,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:58:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-30 10:58:39,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:58:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:58:39,194 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-30 10:58:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:39,195 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:58:39,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:39,195 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:58:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:39,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:39,195 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:58:39,196 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:39,196 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:39,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1958661425, now seen corresponding path program 26 times [2018-09-30 10:58:39,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:39,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:39,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:39,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:39,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:39,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:39,398 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 [2018-09-30 10:58:39,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:39,412 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:39,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:39,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:39,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:39,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:39,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:39,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:39,452 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:39,452 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-30 10:58:39,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:39,704 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 10:58:39,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:39,705 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:39,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:39,705 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:58:39,706 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:58:39,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:58:39,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-30 10:58:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:39,719 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:58:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:39,719 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:39,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:39,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:39,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:39,720 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:39,720 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:39,720 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:39,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1958663347, now seen corresponding path program 27 times [2018-09-30 10:58:39,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:39,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:39,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:39,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:39,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:39,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:39,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:39,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:39,811 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:58:39,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:39,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:39,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:39,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:39,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:39,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:39,874 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:39,874 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:58:39,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:39,991 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 10:58:39,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:39,992 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:39,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:39,992 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:58:39,993 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:58:39,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:58:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-30 10:58:40,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:58:40,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:58:40,004 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 10:58:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:40,004 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:58:40,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:58:40,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:40,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:40,005 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:40,005 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:40,006 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:40,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1960508467, now seen corresponding path program 28 times [2018-09-30 10:58:40,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:40,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:40,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:40,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:40,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:40,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:40,037 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 [2018-09-30 10:58:40,045 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:40,056 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:40,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:40,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:40,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:40,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:40,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:40,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:40,109 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:40,109 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 10:58:40,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:40,220 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 10:58:40,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:40,220 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:40,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:40,221 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:58:40,221 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:58:40,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:40,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:58:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-30 10:58:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:40,236 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:58:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:40,236 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:40,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:40,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:40,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:40,236 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:40,237 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:40,237 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:40,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1960510389, now seen corresponding path program 29 times [2018-09-30 10:58:40,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:40,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:40,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:40,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:40,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:40,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:40,362 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 [2018-09-30 10:58:40,369 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:40,378 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:58:40,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:40,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:40,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:40,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:40,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:40,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:40,445 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:40,445 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:58:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:40,535 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-30 10:58:40,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:40,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:40,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:40,537 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:58:40,537 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:58:40,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:58:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-30 10:58:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:58:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:58:40,549 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-30 10:58:40,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:40,549 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:58:40,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:40,549 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:58:40,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:40,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:40,550 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:58:40,550 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:40,550 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:40,550 INFO L82 PathProgramCache]: Analyzing trace with hash 863712433, now seen corresponding path program 30 times [2018-09-30 10:58:40,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:40,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:40,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:40,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:40,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:40,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:40,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:40,624 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:40,631 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 10:58:40,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:40,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:40,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:40,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:40,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:40,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:40,674 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:40,674 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-30 10:58:40,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:40,766 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:58:40,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:40,766 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:40,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:40,767 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:58:40,767 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:58:40,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:40,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:58:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 10:58:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:40,782 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:58:40,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:40,782 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:40,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:40,782 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:40,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:40,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:40,783 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:40,783 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:40,783 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:40,783 INFO L82 PathProgramCache]: Analyzing trace with hash 863714355, now seen corresponding path program 31 times [2018-09-30 10:58:40,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:40,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:40,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:40,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:40,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:40,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:40,820 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 [2018-09-30 10:58:40,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:40,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:40,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:40,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:40,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:40,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:40,890 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:40,890 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:58:41,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:41,424 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:58:41,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:41,424 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:41,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:41,425 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:58:41,425 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:58:41,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:41,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:58:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 10:58:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:58:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:58:41,440 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 10:58:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:41,440 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:58:41,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:58:41,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:41,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:41,440 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:41,441 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:41,441 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:41,441 INFO L82 PathProgramCache]: Analyzing trace with hash 865559475, now seen corresponding path program 32 times [2018-09-30 10:58:41,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:41,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:41,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:41,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:41,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:41,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:41,472 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 [2018-09-30 10:58:41,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:41,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:41,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:41,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:41,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:41,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:41,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:41,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:41,569 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:41,569 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 10:58:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:41,663 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:58:41,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:41,664 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:41,664 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:58:41,664 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:58:41,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:58:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 10:58:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:41,679 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:58:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:41,679 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:41,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:41,679 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:41,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:41,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:41,680 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:41,680 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:41,680 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:41,680 INFO L82 PathProgramCache]: Analyzing trace with hash 865561397, now seen corresponding path program 33 times [2018-09-30 10:58:41,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:41,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:41,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:41,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:41,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:41,758 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:41,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:41,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:41,772 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:58:41,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:41,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:41,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:41,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:41,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:41,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:41,812 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:41,812 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:58:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:41,919 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:58:41,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:41,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:41,920 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:58:41,920 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:58:41,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:58:41,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-30 10:58:41,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:58:41,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:58:41,936 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-30 10:58:41,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:41,936 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:58:41,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:41,936 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:58:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:41,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:41,936 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:41,937 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:41,937 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1656247501, now seen corresponding path program 34 times [2018-09-30 10:58:41,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:41,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:41,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:41,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:41,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:42,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:42,013 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 [2018-09-30 10:58:42,023 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:42,028 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:42,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:42,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:42,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:42,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:42,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:42,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:42,071 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:42,072 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-30 10:58:42,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:42,156 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 10:58:42,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:42,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:42,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:42,157 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:58:42,157 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:58:42,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:42,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:58:42,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-30 10:58:42,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:42,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:42,173 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:58:42,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:42,173 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:42,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:42,173 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:42,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:42,173 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:42,174 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:42,174 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:42,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1656245579, now seen corresponding path program 35 times [2018-09-30 10:58:42,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:42,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:42,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:42,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:42,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:42,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:42,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:42,317 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:42,325 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:58:42,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:42,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:42,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:42,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:42,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:42,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:42,370 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:42,370 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:58:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:42,461 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 10:58:42,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:42,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:42,462 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:58:42,462 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:58:42,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:42,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:58:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-30 10:58:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:58:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:58:42,477 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 10:58:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:42,477 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:58:42,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:58:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:42,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:42,478 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:42,478 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:42,478 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:42,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1654400459, now seen corresponding path program 36 times [2018-09-30 10:58:42,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:42,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:42,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:42,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:42,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:42,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:42,515 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 [2018-09-30 10:58:42,525 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:42,532 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 10:58:42,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:42,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:42,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:42,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:42,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:42,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:42,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:42,589 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 10:58:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:42,692 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 10:58:42,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:42,692 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:42,693 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:58:42,693 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:58:42,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:58:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-30 10:58:42,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:42,709 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:58:42,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:42,709 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:42,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:42,709 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:42,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:42,709 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:58:42,710 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:42,710 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:42,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1654398537, now seen corresponding path program 37 times [2018-09-30 10:58:42,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:42,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:42,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:42,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:42,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:42,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:42,744 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 [2018-09-30 10:58:42,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:42,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:42,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:42,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:42,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:42,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:42,817 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:42,818 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:58:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:42,931 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-30 10:58:42,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:42,932 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:42,932 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:58:42,932 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:58:42,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:58:42,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-30 10:58:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:58:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:58:42,943 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-30 10:58:42,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:42,943 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:58:42,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:58:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:42,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:42,944 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:58:42,944 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:42,944 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:42,944 INFO L82 PathProgramCache]: Analyzing trace with hash 884718641, now seen corresponding path program 38 times [2018-09-30 10:58:42,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:42,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:42,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:42,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:42,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:42,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:42,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:42,987 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:42,991 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:42,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:42,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:43,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:43,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:43,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:43,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:43,038 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:43,039 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-30 10:58:43,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:43,146 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:58:43,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:43,146 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:43,147 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:58:43,147 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:58:43,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:58:43,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-30 10:58:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:43,170 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:58:43,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:43,170 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:43,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:43,170 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:43,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:43,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:43,170 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:43,171 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:43,171 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:43,171 INFO L82 PathProgramCache]: Analyzing trace with hash 884720563, now seen corresponding path program 39 times [2018-09-30 10:58:43,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:43,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:43,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:43,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:43,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:43,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:43,597 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 [2018-09-30 10:58:43,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:43,687 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:58:43,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:43,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:43,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:43,844 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:43,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:43,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:43,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:43,845 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:58:43,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:43,965 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:58:43,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:43,966 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:43,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:43,966 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:58:43,966 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:58:43,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:43,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:58:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-30 10:58:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:43,988 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:58:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:43,988 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:43,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:43,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:43,989 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:43,989 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:43,989 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:43,989 INFO L82 PathProgramCache]: Analyzing trace with hash 886565683, now seen corresponding path program 40 times [2018-09-30 10:58:43,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:43,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:43,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:43,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:43,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:44,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:44,026 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 [2018-09-30 10:58:44,034 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:44,047 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:44,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:44,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:44,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:44,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:44,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:44,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:44,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:44,109 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:58:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:44,276 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:58:44,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:44,276 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:44,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:44,277 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:58:44,277 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:58:44,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:44,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:58:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-30 10:58:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:44,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:44,300 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:58:44,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:44,300 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:44,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:44,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:44,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:44,301 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:44,301 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:44,301 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:44,302 INFO L82 PathProgramCache]: Analyzing trace with hash 886567605, now seen corresponding path program 41 times [2018-09-30 10:58:44,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:44,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:44,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:44,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:44,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:44,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:44,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:44,478 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:44,487 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:58:44,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:44,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:44,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:44,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:44,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:44,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:44,536 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:44,537 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:58:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:44,677 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:58:44,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:44,677 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:44,678 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:58:44,678 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:58:44,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:44,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:58:44,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2018-09-30 10:58:44,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:58:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:58:44,697 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 10:58:44,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:44,697 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:58:44,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:44,697 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:58:44,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:44,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:44,698 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:44,698 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:44,698 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:44,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1635241293, now seen corresponding path program 42 times [2018-09-30 10:58:44,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:44,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:44,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:44,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:44,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:44,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:44,754 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 [2018-09-30 10:58:44,762 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:44,772 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 10:58:44,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:44,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:44,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:44,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:44,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:44,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:44,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:44,834 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 10:58:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:45,058 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:58:45,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:45,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:45,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:45,058 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:58:45,058 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:58:45,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:58:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-30 10:58:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:45,079 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:58:45,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:45,080 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:45,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:45,080 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:45,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:45,080 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:45,080 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:45,080 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:45,080 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:45,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1635239371, now seen corresponding path program 43 times [2018-09-30 10:58:45,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:45,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:45,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:45,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:45,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:45,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:45,169 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 [2018-09-30 10:58:45,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:45,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:45,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:45,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:45,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:45,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:45,246 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:45,247 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:58:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:45,366 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:58:45,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:45,366 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:45,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:45,367 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:58:45,367 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:58:45,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:58:45,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-30 10:58:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:45,388 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:58:45,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:45,388 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:45,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:45,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:45,389 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:45,389 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:45,389 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:45,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1633394251, now seen corresponding path program 44 times [2018-09-30 10:58:45,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:45,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:45,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:45,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:45,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:45,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:45,439 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 [2018-09-30 10:58:45,447 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:45,452 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:45,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:45,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:45,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:45,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:45,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:45,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:45,491 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:45,491 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:58:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:45,607 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:58:45,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:45,608 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:45,608 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:58:45,609 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:58:45,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:45,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:58:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-30 10:58:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:45,630 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:58:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:45,630 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:45,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:45,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:45,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:45,630 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:58:45,631 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:45,631 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:45,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1633392329, now seen corresponding path program 45 times [2018-09-30 10:58:45,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:45,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:45,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:45,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:45,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:45,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:45,664 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 [2018-09-30 10:58:45,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:45,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:58:45,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:45,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:45,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:45,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:45,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:45,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:45,727 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:45,727 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:58:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:45,850 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:58:45,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:45,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:45,851 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:58:45,851 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:58:45,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:58:45,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-09-30 10:58:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:58:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:58:45,869 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-30 10:58:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:45,869 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:58:45,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:58:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:45,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:45,870 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:45,870 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:45,870 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:45,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1564777011, now seen corresponding path program 46 times [2018-09-30 10:58:45,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:45,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:45,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:45,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:45,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:45,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:45,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:45,923 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:45,950 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:45,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:45,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:46,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:46,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:46,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:46,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:46,004 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:46,004 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-30 10:58:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:46,110 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:58:46,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:46,111 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:46,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:46,112 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:58:46,112 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:58:46,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:58:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 10:58:46,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:46,136 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:58:46,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:46,136 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:46,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:46,136 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:46,137 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:46,137 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:46,137 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:46,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1564778933, now seen corresponding path program 47 times [2018-09-30 10:58:46,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:46,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:46,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:46,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:46,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:46,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:46,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:46,193 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:46,199 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:58:46,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:46,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:46,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:46,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:46,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:46,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:46,269 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:46,269 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:58:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:46,379 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:58:46,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:46,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:46,380 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:58:46,380 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:58:46,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:46,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:58:46,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 10:58:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:46,401 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:58:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:46,401 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:46,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:46,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:46,401 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:46,402 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:46,402 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:46,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1566624053, now seen corresponding path program 48 times [2018-09-30 10:58:46,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:46,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:46,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:46,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:46,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:46,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:46,439 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 [2018-09-30 10:58:46,447 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:46,453 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 10:58:46,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:46,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:46,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:46,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:46,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:46,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:46,508 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:46,508 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:58:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:46,637 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:58:46,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:46,638 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:46,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:46,639 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:58:46,639 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:58:46,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:58:46,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 10:58:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:46,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:58:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:46,661 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:46,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:46,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:46,662 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:58:46,662 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:46,662 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:46,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1566625975, now seen corresponding path program 49 times [2018-09-30 10:58:46,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:46,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:46,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:46,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:46,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:46,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:46,700 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 [2018-09-30 10:58:46,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:46,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:46,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:46,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:46,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:46,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:46,803 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:46,803 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:58:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:47,099 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:58:47,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:47,099 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:47,100 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:58:47,100 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:58:47,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:47,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:58:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-09-30 10:58:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:58:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:58:47,121 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 10:58:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:47,121 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:58:47,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:58:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:47,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:47,122 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 10:58:47,122 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:47,122 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:47,122 INFO L82 PathProgramCache]: Analyzing trace with hash -955182923, now seen corresponding path program 50 times [2018-09-30 10:58:47,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:47,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:47,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:47,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:47,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:47,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:47,165 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 [2018-09-30 10:58:47,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:47,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:47,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:47,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:47,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:47,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:47,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:47,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:47,230 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:47,230 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 10:58:47,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:47,328 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:58:47,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:47,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:47,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:47,330 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:58:47,330 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:58:47,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:47,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:58:47,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-09-30 10:58:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:47,355 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:58:47,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:47,355 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:47,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:47,355 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:47,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:47,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:47,356 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:58:47,356 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:47,356 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:47,356 INFO L82 PathProgramCache]: Analyzing trace with hash -955181001, now seen corresponding path program 51 times [2018-09-30 10:58:47,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:47,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:47,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:47,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:47,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:47,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:47,398 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 [2018-09-30 10:58:47,408 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:47,415 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:58:47,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:47,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:47,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:47,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:47,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:47,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:47,461 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:47,461 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:58:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:47,573 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:58:47,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:47,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:47,574 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:58:47,574 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:58:47,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:47,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:58:47,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-30 10:58:47,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:47,598 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 10:58:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:47,598 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:47,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:47,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:47,599 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 10:58:47,599 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:47,599 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:47,599 INFO L82 PathProgramCache]: Analyzing trace with hash -953335881, now seen corresponding path program 52 times [2018-09-30 10:58:47,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:47,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:47,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:47,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:47,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:47,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:47,641 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 [2018-09-30 10:58:47,649 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:47,656 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:47,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:47,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:47,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:47,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:47,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:47,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:47,709 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:47,709 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 10:58:47,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:47,809 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 10:58:47,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:47,810 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:47,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:47,810 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:58:47,810 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:58:47,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:47,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:58:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-09-30 10:58:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:47,834 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 10:58:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:47,834 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:47,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:47,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:58:47,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:47,834 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-30 10:58:47,835 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:47,835 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:47,835 INFO L82 PathProgramCache]: Analyzing trace with hash -953333959, now seen corresponding path program 5 times [2018-09-30 10:58:47,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:47,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:47,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:47,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:47,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:47,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:47,902 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 [2018-09-30 10:58:47,910 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:47,917 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:58:47,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:47,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:47,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:47,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:58:47,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:58:47,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:58:47,968 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:47,968 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 10:58:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:48,063 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2018-09-30 10:58:48,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:58:48,064 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 10:58:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:48,065 INFO L225 Difference]: With dead ends: 28 [2018-09-30 10:58:48,065 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:58:48,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:48,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:58:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2018-09-30 10:58:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:58:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 10:58:48,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-30 10:58:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:48,082 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 10:58:48,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:58:48,083 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 10:58:48,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:48,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:48,083 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-30 10:58:48,083 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:48,083 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:48,083 INFO L82 PathProgramCache]: Analyzing trace with hash 397590258, now seen corresponding path program 6 times [2018-09-30 10:58:48,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:48,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:48,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:48,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:48,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:48,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:48,130 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 [2018-09-30 10:58:48,142 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:48,155 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:58:48,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:48,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:48,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:48,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:48,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:48,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:48,212 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:48,213 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 9 states. [2018-09-30 10:58:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:48,356 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:58:48,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:48,357 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:48,357 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:58:48,357 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:58:48,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:48,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:58:48,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 10:58:48,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:48,391 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:48,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:48,391 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:48,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:48,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:48,391 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:58:48,392 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:48,392 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:48,392 INFO L82 PathProgramCache]: Analyzing trace with hash 397592180, now seen corresponding path program 53 times [2018-09-30 10:58:48,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:48,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:48,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:48,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:48,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:48,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:48,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:48,497 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:48,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:58:48,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:48,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:48,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:48,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:48,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:48,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:48,547 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:48,547 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:48,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:48,709 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:58:48,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:48,709 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:48,710 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:58:48,710 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:58:48,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:58:48,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 10:58:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:48,740 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:58:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:48,740 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:48,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:48,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:48,740 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:58:48,741 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:48,741 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:48,741 INFO L82 PathProgramCache]: Analyzing trace with hash 399437300, now seen corresponding path program 54 times [2018-09-30 10:58:48,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:48,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:48,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:48,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:48,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:48,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:48,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:48,791 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:48,799 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:58:48,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:48,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:48,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:48,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:48,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:48,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:48,888 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:48,889 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:58:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:49,055 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:58:49,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:49,056 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:49,056 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:58:49,057 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:58:49,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:58:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 10:58:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:49,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:49,094 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:49,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:49,094 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:49,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:49,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:49,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:49,094 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:49,095 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:49,095 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:49,095 INFO L82 PathProgramCache]: Analyzing trace with hash 399439222, now seen corresponding path program 55 times [2018-09-30 10:58:49,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:49,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:49,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:49,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:49,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:49,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:49,177 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 [2018-09-30 10:58:49,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:49,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:49,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:49,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:49,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:49,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:49,249 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:49,249 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:49,419 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:58:49,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:49,420 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:49,420 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:58:49,420 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:58:49,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:58:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-30 10:58:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:49,451 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 10:58:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:49,452 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:49,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:49,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:49,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:49,452 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:58:49,452 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:49,452 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:49,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2122369676, now seen corresponding path program 56 times [2018-09-30 10:58:49,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:49,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:49,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:49,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:49,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:49,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:49,536 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 [2018-09-30 10:58:49,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:49,550 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:49,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:49,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:49,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:49,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:49,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:49,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:49,594 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:49,595 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 10:58:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:49,767 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:58:49,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:49,767 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:49,768 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:58:49,768 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:58:49,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:58:49,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 10:58:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:49,801 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:49,801 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:49,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:49,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:49,802 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:49,802 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:49,802 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:49,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2122367754, now seen corresponding path program 57 times [2018-09-30 10:58:49,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:49,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:49,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:49,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:49,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:49,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:49,859 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 [2018-09-30 10:58:49,867 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:49,878 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:58:49,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:49,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:49,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:49,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:49,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:49,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:49,963 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:49,964 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:50,188 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:58:50,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:50,188 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:50,189 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:58:50,189 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:58:50,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:50,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:58:50,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 10:58:50,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:50,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:50,222 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:58:50,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:50,222 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:50,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:50,222 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:50,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:50,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:50,222 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:50,222 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:50,223 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:50,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2120522634, now seen corresponding path program 58 times [2018-09-30 10:58:50,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:50,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:50,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:50,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:50,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:50,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:50,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:50,270 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:50,275 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:50,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:50,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:50,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:50,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:50,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:50,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:50,320 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:50,321 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:58:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:50,481 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:58:50,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:50,481 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:50,482 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:58:50,482 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:58:50,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:50,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:58:50,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 10:58:50,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:50,514 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:50,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:50,514 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:50,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:50,514 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:50,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:50,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:50,514 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:58:50,515 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:50,515 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:50,515 INFO L82 PathProgramCache]: Analyzing trace with hash -2120520712, now seen corresponding path program 59 times [2018-09-30 10:58:50,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:50,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:50,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:50,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:50,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:50,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:50,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:50,948 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:50,960 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:58:50,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:50,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:51,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:51,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:51,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:51,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:51,040 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:51,041 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:51,190 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:58:51,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:51,190 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:51,191 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:58:51,191 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:58:51,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:58:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-30 10:58:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:58:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:58:51,217 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-30 10:58:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:51,217 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:58:51,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:51,218 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:58:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:51,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:51,218 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:58:51,218 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:51,218 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:51,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1077648628, now seen corresponding path program 60 times [2018-09-30 10:58:51,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:51,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:51,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:51,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:51,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:51,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:51,255 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 [2018-09-30 10:58:51,263 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:51,269 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:58:51,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:51,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:51,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:51,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:51,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:51,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:51,321 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:51,322 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-30 10:58:51,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:51,483 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:58:51,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:51,483 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:51,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:51,483 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:58:51,483 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:58:51,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:51,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:58:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 10:58:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:51,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:51,519 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:51,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:51,520 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:51,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:51,520 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:51,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:51,520 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:51,520 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:51,520 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:51,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650550, now seen corresponding path program 61 times [2018-09-30 10:58:51,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:51,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:51,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:51,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:51,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:51,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:51,583 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 [2018-09-30 10:58:51,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:51,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:51,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:51,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:51,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:51,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:51,654 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:51,654 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:51,796 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:58:51,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:51,797 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:51,798 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:58:51,798 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:58:51,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:58:51,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 10:58:51,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:51,833 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:58:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:51,833 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:51,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:51,833 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:51,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:51,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:51,834 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:51,834 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:51,834 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:51,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1079495670, now seen corresponding path program 62 times [2018-09-30 10:58:51,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:51,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:51,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:51,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:51,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:51,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:51,946 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 [2018-09-30 10:58:51,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:51,959 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:51,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:51,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:52,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:52,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:52,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:52,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:52,001 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:52,001 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:58:52,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:52,150 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:58:52,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:52,150 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:52,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:52,151 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:58:52,151 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:58:52,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:58:52,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 10:58:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:52,188 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:52,188 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:52,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:52,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:52,188 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:58:52,189 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:52,189 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:52,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1079497592, now seen corresponding path program 63 times [2018-09-30 10:58:52,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:52,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:52,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:52,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:52,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:52,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:52,234 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 [2018-09-30 10:58:52,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:52,250 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:58:52,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:52,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:52,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:52,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:52,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:52,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:52,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:52,324 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:52,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:52,467 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:58:52,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:52,467 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:52,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:52,468 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:58:52,468 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:58:52,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:58:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-30 10:58:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:52,499 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 10:58:52,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:52,499 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:52,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:52,500 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:52,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:52,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:52,500 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:52,500 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:52,500 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:52,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1442311306, now seen corresponding path program 64 times [2018-09-30 10:58:52,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:52,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:52,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:52,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:52,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:52,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:52,550 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 [2018-09-30 10:58:52,559 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:52,566 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:52,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:52,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:52,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:52,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:52,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:52,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:52,652 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:52,652 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 10:58:52,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:52,776 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:58:52,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:52,776 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:52,777 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:58:52,777 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:58:52,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:58:52,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-30 10:58:52,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:52,815 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:52,815 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:52,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:52,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:52,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:52,816 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:58:52,816 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:52,816 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:52,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1442309384, now seen corresponding path program 65 times [2018-09-30 10:58:52,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:52,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:52,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:52,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:52,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:53,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:53,042 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 [2018-09-30 10:58:53,051 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:53,063 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:58:53,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:53,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:53,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:53,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:53,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:53,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:53,105 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:53,105 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:53,244 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:58:53,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:53,244 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:53,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:53,245 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:58:53,245 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:58:53,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:53,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:58:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-30 10:58:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:53,279 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:58:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:53,279 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:53,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:53,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:53,279 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:58:53,279 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:53,279 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:53,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1440464264, now seen corresponding path program 66 times [2018-09-30 10:58:53,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:53,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:53,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:53,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:53,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:53,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:53,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:53,556 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:53,563 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:58:53,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:53,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:53,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:53,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:53,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:53,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:53,611 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:53,611 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:58:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:53,741 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:58:53,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:53,742 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:53,742 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:58:53,743 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:58:53,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:58:53,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-30 10:58:53,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:53,781 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:53,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:53,781 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:53,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:53,781 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:53,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:53,781 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:53,782 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:53,782 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:53,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1440462342, now seen corresponding path program 67 times [2018-09-30 10:58:53,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:53,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:53,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:53,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:53,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:53,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:53,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:58:53,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:53,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:53,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:53,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:53,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:53,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:53,893 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:53,893 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:54,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:54,023 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-30 10:58:54,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:54,023 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:54,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:54,024 INFO L225 Difference]: With dead ends: 30 [2018-09-30 10:58:54,024 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:58:54,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:54,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:58:54,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-30 10:58:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:58:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:58:54,049 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-30 10:58:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:54,049 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:58:54,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:58:54,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:54,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:54,050 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:58:54,050 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:54,050 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1098654836, now seen corresponding path program 68 times [2018-09-30 10:58:54,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:54,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:54,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:54,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:54,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:54,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:54,122 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 [2018-09-30 10:58:54,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:54,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:54,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:54,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:54,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:54,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:54,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:54,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:54,193 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:54,193 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-30 10:58:54,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:54,377 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:58:54,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:54,377 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:54,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:54,378 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:58:54,378 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:58:54,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:54,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:58:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 10:58:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:54,426 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:54,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:54,426 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:54,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:54,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:54,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:54,427 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:54,427 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:54,427 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:54,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1098656758, now seen corresponding path program 69 times [2018-09-30 10:58:54,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:54,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:54,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:54,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:54,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:54,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:54,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:54,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:54,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:58:54,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:54,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:54,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:54,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:54,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:54,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:54,561 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:54,561 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:54,802 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:58:54,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:54,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:54,803 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:58:54,803 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:58:54,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:58:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 10:58:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:54,846 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:58:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:54,846 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:54,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:54,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:54,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:54,846 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:54,847 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:54,847 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:54,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1100501878, now seen corresponding path program 70 times [2018-09-30 10:58:54,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:54,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:54,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:54,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:54,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:54,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:54,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:54,972 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:54,977 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:54,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:54,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:55,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:55,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:55,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:55,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:55,048 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:55,049 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:58:55,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:55,287 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:58:55,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:55,287 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:55,287 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:58:55,287 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:58:55,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:58:55,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 10:58:55,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:55,330 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:55,331 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:55,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:55,331 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:55,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:55,331 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:58:55,331 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:55,331 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:55,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503800, now seen corresponding path program 71 times [2018-09-30 10:58:55,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:55,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:55,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:55,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:55,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:55,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:55,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:55,384 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:55,394 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:58:55,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:55,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:55,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:55,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:55,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:55,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:55,445 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:55,446 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:55,852 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:58:55,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:55,853 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:55,853 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:58:55,853 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:58:55,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:58:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-30 10:58:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:55,892 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 10:58:55,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:55,892 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:55,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:55,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:55,892 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:55,892 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:55,893 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1421305098, now seen corresponding path program 72 times [2018-09-30 10:58:55,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:55,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:55,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:55,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:55,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:55,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:55,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:55,972 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:55,979 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:58:55,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:55,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:56,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:56,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:56,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:56,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:56,038 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:56,038 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 10:58:56,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:56,219 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:58:56,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:56,220 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:56,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:56,220 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:58:56,221 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:58:56,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:56,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:58:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 10:58:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:56,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:56,266 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:56,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:56,266 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:56,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:56,266 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:56,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:56,267 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:58:56,267 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:56,267 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:56,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1421303176, now seen corresponding path program 73 times [2018-09-30 10:58:56,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:56,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:56,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:56,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:56,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:56,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:56,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:56,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:56,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:56,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:56,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:56,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:56,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:56,422 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:56,422 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:56,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:56,607 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:58:56,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:56,607 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:56,608 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:58:56,608 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:58:56,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:58:56,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 10:58:56,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:56,651 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:58:56,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:56,651 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:56,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:56,652 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:56,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:56,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:56,652 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:58:56,652 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:56,653 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:56,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1419458056, now seen corresponding path program 74 times [2018-09-30 10:58:56,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:56,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:56,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:56,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:56,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:56,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:56,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:56,721 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:56,730 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:56,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:56,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:56,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:56,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:56,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:56,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:56,795 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:56,796 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:58:56,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:56,969 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:58:56,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:56,970 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:56,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:56,970 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:58:56,970 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:58:56,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:56,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:58:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 10:58:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:57,014 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:57,014 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:57,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:57,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:57,014 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:57,015 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:57,015 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:57,015 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:57,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1419456134, now seen corresponding path program 75 times [2018-09-30 10:58:57,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:57,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:57,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:57,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:57,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:57,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:57,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:57,070 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:57,077 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:58:57,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:57,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:57,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:57,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:57,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:57,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:57,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:57,123 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:57,291 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:58:57,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:57,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:57,292 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:58:57,292 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:58:57,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:58:57,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-30 10:58:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:58:57,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:58:57,322 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-30 10:58:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:57,323 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:58:57,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:58:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:57,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:57,323 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:57,323 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:57,323 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:57,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1778713206, now seen corresponding path program 76 times [2018-09-30 10:58:57,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:57,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:57,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:57,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:57,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:57,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:57,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:57,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:57,374 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:57,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:57,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:57,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:57,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:57,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:57,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:57,434 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:57,434 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-30 10:58:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:57,601 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:58:57,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:57,601 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:57,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:57,602 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:58:57,602 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:58:57,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:57,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:58:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 10:58:57,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:57,650 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:57,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:57,650 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:57,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:57,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:57,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:57,651 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:58:57,651 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:57,651 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:57,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1778715128, now seen corresponding path program 77 times [2018-09-30 10:58:57,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:57,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:57,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:57,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:57,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:57,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:57,692 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:57,700 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:57,707 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:58:57,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:57,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:57,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:57,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:57,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:57,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:57,760 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:57,760 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:57,927 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:58:57,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:57,927 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:57,928 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:58:57,928 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:58:57,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:57,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:58:57,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 10:58:57,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:57,972 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:58:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:57,972 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:57,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:57,973 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:57,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:57,973 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:58:57,973 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:57,973 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:57,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1780560248, now seen corresponding path program 78 times [2018-09-30 10:58:57,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:57,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:57,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:57,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:57,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:58,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:58,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:58,035 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:58:58,043 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:58:58,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:58,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:58,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:58,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:58,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:58,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:58,238 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:58,238 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:58:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:58,404 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:58:58,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:58,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:58,406 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:58:58,406 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:58:58,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:58:58,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 10:58:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:58,449 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:58,449 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:58,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:58,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:58,450 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:58,450 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:58,450 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:58,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1780562170, now seen corresponding path program 79 times [2018-09-30 10:58:58,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:58,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:58,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:58,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:58,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:58,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:58,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:58,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:58,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:58,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:58,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:58,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:58,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:58,570 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:58,570 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:58,751 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:58:58,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:58,751 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:58,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:58,751 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:58:58,752 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:58:58,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:58,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:58:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-30 10:58:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:58:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:58:58,786 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 10:58:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:58,787 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:58:58,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:58:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:58,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:58,787 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:58:58,788 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:58,788 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:58,788 INFO L82 PathProgramCache]: Analyzing trace with hash -741246728, now seen corresponding path program 80 times [2018-09-30 10:58:58,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:58,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:58,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:58,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:58:58,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:58,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:58,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:58,844 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:58:58,852 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:58:58,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:58,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:58,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:58,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:58,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:58,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:58,897 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:58,897 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 10:58:59,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:59,055 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:58:59,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:59,055 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:59,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:59,056 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:58:59,056 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:58:59,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:58:59,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-30 10:58:59,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:59,103 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:59,103 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:59,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:59,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:59,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:59,103 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:59,104 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:59,104 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:59,104 INFO L82 PathProgramCache]: Analyzing trace with hash -741244806, now seen corresponding path program 81 times [2018-09-30 10:58:59,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:59,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:59,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:59,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:59,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:59,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:59,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:59,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:58:59,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:58:59,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:59,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:59,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:59,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:59,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:59,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:59,298 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:59,298 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:58:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:59,477 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:58:59,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:59,477 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:59,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:59,478 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:58:59,478 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:58:59,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:59,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:58:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-30 10:58:59,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:58:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:58:59,532 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:58:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:59,532 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:58:59,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:58:59,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:59,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:59,533 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:58:59,533 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:59,533 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:59,533 INFO L82 PathProgramCache]: Analyzing trace with hash -739399686, now seen corresponding path program 82 times [2018-09-30 10:58:59,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:59,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:59,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:59,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:59,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:59,621 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:59,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:59,631 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:58:59,636 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:58:59,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:59,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:58:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:59,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:58:59,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:58:59,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:58:59,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:58:59,697 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:58:59,697 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:58:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:58:59,864 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 10:58:59,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:58:59,864 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:58:59,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:58:59,865 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:58:59,865 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:58:59,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:58:59,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:58:59,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-30 10:58:59,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:58:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:58:59,910 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:58:59,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:58:59,910 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:58:59,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:58:59,910 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:58:59,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:58:59,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:58:59,911 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:58:59,911 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:58:59,911 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:58:59,911 INFO L82 PathProgramCache]: Analyzing trace with hash -739397764, now seen corresponding path program 83 times [2018-09-30 10:58:59,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:58:59,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:58:59,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:59,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:58:59,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:58:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:58:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:58:59,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:58:59,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:58:59,978 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:58:59,988 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:58:59,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:58:59,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:00,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:00,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:00,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:00,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:00,052 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:00,052 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:59:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:00,264 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-30 10:59:00,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:00,264 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:00,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:00,265 INFO L225 Difference]: With dead ends: 30 [2018-09-30 10:59:00,265 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:59:00,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:00,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:59:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-30 10:59:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:59:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:59:00,295 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-30 10:59:00,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:00,295 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:59:00,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:00,295 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:59:00,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:00,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:00,295 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:59:00,295 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:00,296 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:00,296 INFO L82 PathProgramCache]: Analyzing trace with hash -189215756, now seen corresponding path program 84 times [2018-09-30 10:59:00,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:00,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:00,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:00,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:00,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:00,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:00,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:00,354 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:00,362 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:59:00,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:00,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:00,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:00,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:00,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:00,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:00,431 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:00,431 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-30 10:59:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:00,652 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:59:00,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:00,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:00,653 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:59:00,653 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:59:00,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:00,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:59:00,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:59:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:00,713 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:00,713 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:00,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:00,714 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:00,714 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:00,714 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:00,715 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:00,715 INFO L82 PathProgramCache]: Analyzing trace with hash -189213834, now seen corresponding path program 85 times [2018-09-30 10:59:00,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:00,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:00,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:00,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:00,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:00,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:00,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:00,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:00,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:00,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:00,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:00,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:00,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:00,840 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:00,840 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:01,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:01,062 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:59:01,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:01,062 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:01,063 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:59:01,063 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:59:01,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:01,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:59:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-30 10:59:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:01,117 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:59:01,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:01,117 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:01,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:01,117 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:01,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:01,118 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:01,118 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:01,118 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:01,118 INFO L82 PathProgramCache]: Analyzing trace with hash -187368714, now seen corresponding path program 86 times [2018-09-30 10:59:01,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:01,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:01,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:01,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:01,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:01,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:01,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:01,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:01,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:01,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:01,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:01,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:01,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:01,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:01,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:01,244 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:01,244 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:59:01,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:01,482 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:59:01,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:01,483 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:01,483 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:59:01,483 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:59:01,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:59:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:59:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:01,541 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:01,541 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:01,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:01,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:01,541 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:59:01,542 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:01,542 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:01,542 INFO L82 PathProgramCache]: Analyzing trace with hash -187366792, now seen corresponding path program 87 times [2018-09-30 10:59:01,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:01,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:01,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:01,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:01,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:01,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:01,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:01,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:01,604 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:59:01,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:01,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:01,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:01,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:01,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:01,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:01,665 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:01,665 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:02,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:02,079 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:59:02,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:02,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:02,080 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:59:02,080 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:59:02,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:02,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:59:02,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-30 10:59:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:59:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:59:02,164 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:59:02,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:02,165 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:59:02,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:02,165 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:59:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:02,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:02,165 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:02,166 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:02,166 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:02,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1585791606, now seen corresponding path program 88 times [2018-09-30 10:59:02,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:02,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:02,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:02,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:02,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:02,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:02,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:02,679 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:02,709 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:02,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:02,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:03,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:03,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:03,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:03,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:03,180 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:03,180 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:59:03,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:03,891 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:03,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:03,892 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:03,892 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:03,892 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:03,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:03,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 10:59:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:03,949 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:03,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:03,949 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:03,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:03,949 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:03,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:03,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:03,950 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:59:03,950 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:03,950 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:03,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1585793528, now seen corresponding path program 89 times [2018-09-30 10:59:03,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:03,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:03,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:03,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:03,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:04,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:04,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:04,048 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:04,056 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:59:04,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:04,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:04,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:04,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:04,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:04,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:04,111 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:04,111 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:04,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:04,339 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:04,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:04,340 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:04,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:04,341 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:04,341 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:04,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:04,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-30 10:59:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:04,396 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:59:04,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:04,396 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:04,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:04,396 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:04,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:04,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:04,397 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:59:04,397 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:04,397 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:04,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1587638648, now seen corresponding path program 90 times [2018-09-30 10:59:04,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:04,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:04,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:04,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:04,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:04,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:04,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:04,522 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:04,527 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:59:04,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:04,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:04,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:04,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:04,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:04,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:04,604 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:04,604 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:59:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:04,818 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:59:04,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:04,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:04,824 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:59:04,824 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:59:04,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:04,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:59:04,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 10:59:04,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:04,888 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:04,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:04,888 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:04,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:04,888 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:04,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:04,888 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:04,889 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:04,889 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:04,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1587640570, now seen corresponding path program 91 times [2018-09-30 10:59:04,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:04,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:04,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:04,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:04,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:04,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:04,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:04,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:04,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:05,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:05,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:05,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:05,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:05,006 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:05,006 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:05,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:05,233 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:59:05,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:05,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:05,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:05,233 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:59:05,233 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:59:05,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:59:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2018-09-30 10:59:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:59:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:59:05,278 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 10:59:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:05,278 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:59:05,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:59:05,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:05,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:05,279 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:05,279 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:05,279 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash 490842614, now seen corresponding path program 92 times [2018-09-30 10:59:05,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:05,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:05,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:05,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:05,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:05,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:05,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:05,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:05,350 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:05,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:05,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:05,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:05,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:05,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:05,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:05,413 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:05,413 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 10:59:05,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:05,710 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:59:05,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:05,710 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:05,711 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:59:05,711 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:59:05,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:59:05,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:59:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:05,776 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:05,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:05,777 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:05,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:05,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:05,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:05,777 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:59:05,777 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:05,778 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:05,778 INFO L82 PathProgramCache]: Analyzing trace with hash 490844536, now seen corresponding path program 93 times [2018-09-30 10:59:05,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:05,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:05,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:05,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:05,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:05,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:05,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:05,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:05,842 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:59:05,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:05,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:05,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:05,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:05,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:05,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:05,905 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:05,905 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:06,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:06,334 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:59:06,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:06,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:06,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:06,335 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:59:06,335 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:59:06,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:06,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:59:06,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-30 10:59:06,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:06,432 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:59:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:06,433 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:06,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:06,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:06,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:06,433 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:59:06,434 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:06,434 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:06,434 INFO L82 PathProgramCache]: Analyzing trace with hash 492689656, now seen corresponding path program 94 times [2018-09-30 10:59:06,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:06,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:06,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:06,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:06,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:06,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:06,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:06,725 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:06,729 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:06,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:06,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:06,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:06,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:06,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:06,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:06,786 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:06,786 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:59:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:07,026 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:59:07,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:07,026 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:07,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:07,026 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:59:07,026 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:59:07,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:59:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:59:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:07,084 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:07,085 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:07,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:07,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:07,085 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:07,085 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:07,085 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:07,085 INFO L82 PathProgramCache]: Analyzing trace with hash 492691578, now seen corresponding path program 95 times [2018-09-30 10:59:07,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:07,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:07,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:07,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:07,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:07,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:07,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:07,166 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:07,175 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:59:07,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:07,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:07,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:07,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:07,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:07,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:07,243 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:07,243 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:07,470 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:59:07,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:07,471 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:07,471 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:59:07,472 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:59:07,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:07,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:59:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-30 10:59:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:59:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:59:07,526 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:59:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:07,526 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:59:07,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:59:07,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:07,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:07,526 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:59:07,526 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:07,527 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:07,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2029117320, now seen corresponding path program 96 times [2018-09-30 10:59:07,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:07,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:07,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:07,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:07,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:07,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:07,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:07,681 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:07,691 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:59:07,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:07,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:07,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:07,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:07,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:07,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:07,732 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:07,732 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:59:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:07,955 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:07,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:07,955 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:07,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:07,956 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:07,956 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:07,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:07,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:08,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 10:59:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:08,016 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:08,016 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:08,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:08,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:08,017 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:08,017 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:08,017 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2029115398, now seen corresponding path program 97 times [2018-09-30 10:59:08,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:08,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:08,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:08,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:08,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:08,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:08,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:08,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:08,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:08,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:08,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:08,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:08,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:08,157 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:08,157 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:08,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:08,390 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:08,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:08,391 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:08,391 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:08,391 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:08,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:08,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-30 10:59:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:08,451 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:59:08,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:08,451 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:08,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:08,452 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:08,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:08,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:08,452 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:08,452 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:08,452 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:08,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2027270278, now seen corresponding path program 98 times [2018-09-30 10:59:08,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:08,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:08,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:08,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:08,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:08,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:08,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:08,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:08,520 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:08,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:08,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:08,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:08,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:08,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:08,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:08,575 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:08,576 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:59:08,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:08,801 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:59:08,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:08,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:08,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:08,802 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:59:08,802 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:59:08,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:59:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 10:59:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:08,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:08,866 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:08,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:08,866 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:08,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:08,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:08,867 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:08,867 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:59:08,867 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:08,867 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:08,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2027268356, now seen corresponding path program 99 times [2018-09-30 10:59:08,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:08,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:08,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:08,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:08,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:08,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:08,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:08,928 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:08,936 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:59:08,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:08,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:08,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:08,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:08,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:08,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:08,981 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:08,981 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:09,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:09,193 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:59:09,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:09,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:09,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:09,194 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:59:09,194 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:59:09,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:59:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2018-09-30 10:59:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:59:09,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:59:09,240 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-30 10:59:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:09,240 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:59:09,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:59:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:09,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:09,241 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:09,241 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:09,241 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash 511848822, now seen corresponding path program 100 times [2018-09-30 10:59:09,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:09,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:09,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:09,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:09,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:09,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:09,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:09,306 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:09,311 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:09,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:09,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:09,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:09,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:09,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:09,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:09,361 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:09,361 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-30 10:59:09,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:09,614 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:59:09,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:09,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:09,615 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:59:09,615 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:59:09,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:59:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 10:59:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:09,683 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:09,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:09,683 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:09,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:09,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:09,684 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:59:09,684 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:09,684 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:09,684 INFO L82 PathProgramCache]: Analyzing trace with hash 511850744, now seen corresponding path program 101 times [2018-09-30 10:59:09,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:09,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:09,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:09,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:09,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:09,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:09,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:09,744 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:09,750 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:59:09,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:09,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:09,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:09,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:09,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:09,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:09,798 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:09,798 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:10,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:10,048 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:59:10,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:10,048 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:10,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:10,049 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:59:10,049 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:59:10,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:10,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:59:10,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-30 10:59:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:10,114 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:59:10,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:10,114 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:10,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:10,114 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:10,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:10,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:10,115 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:59:10,115 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:10,115 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:10,115 INFO L82 PathProgramCache]: Analyzing trace with hash 513695864, now seen corresponding path program 102 times [2018-09-30 10:59:10,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:10,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:10,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:10,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:10,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:10,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:10,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:10,167 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:10,173 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:59:10,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:10,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:10,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:10,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:10,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:10,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:10,238 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:10,238 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:59:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:10,514 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:59:10,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:10,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:10,514 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:59:10,514 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:59:10,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:10,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:59:10,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 10:59:10,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:10,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:10,586 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:10,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:10,586 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:10,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:10,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:10,587 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:10,587 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:10,587 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:10,587 INFO L82 PathProgramCache]: Analyzing trace with hash 513697786, now seen corresponding path program 103 times [2018-09-30 10:59:10,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:10,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:10,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:10,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:10,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:10,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:10,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:10,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:10,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:10,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:10,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:10,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:10,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:10,699 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:10,699 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:10,929 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:59:10,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:10,929 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:10,930 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:59:10,930 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:59:10,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:59:11,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-30 10:59:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:59:11,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:59:11,001 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:59:11,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:11,001 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:59:11,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:59:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:11,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:11,002 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:59:11,002 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:11,002 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:11,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2008111112, now seen corresponding path program 104 times [2018-09-30 10:59:11,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:11,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:11,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:11,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:11,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:11,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:11,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:11,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:11,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:11,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:11,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:11,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:11,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:11,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:11,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:11,115 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:11,116 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:59:11,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:11,344 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:59:11,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:11,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:11,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:11,345 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:59:11,345 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:59:11,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:59:11,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 10:59:11,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:11,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:11,417 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:11,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:11,418 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:11,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:11,418 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:11,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:11,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:11,418 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:11,418 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:11,418 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:11,418 INFO L82 PathProgramCache]: Analyzing trace with hash -2008109190, now seen corresponding path program 105 times [2018-09-30 10:59:11,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:11,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:11,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:11,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:11,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:11,467 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:11,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:11,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:11,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:11,487 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:59:11,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:11,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:11,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:11,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:11,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:11,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:11,574 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:11,574 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:11,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:11,806 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:59:11,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:11,807 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:11,807 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:59:11,808 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:59:11,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:59:11,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-30 10:59:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:11,880 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:59:11,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:11,880 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:11,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:11,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:11,881 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:11,881 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:11,881 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:11,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2006264070, now seen corresponding path program 106 times [2018-09-30 10:59:11,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:11,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:11,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:11,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:11,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:11,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:11,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:12,004 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:12,009 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:12,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:12,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:12,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:12,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:12,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:12,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:12,063 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:12,063 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:59:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:12,284 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:59:12,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:12,284 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:12,285 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:59:12,285 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:59:12,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:12,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:59:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 10:59:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:12,353 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:12,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:12,353 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:12,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:12,353 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:12,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:12,353 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:59:12,354 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:12,354 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:12,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2006262148, now seen corresponding path program 107 times [2018-09-30 10:59:12,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:12,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:12,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:12,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:12,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:12,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:12,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:12,421 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:12,428 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:59:12,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:12,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:12,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:12,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:12,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:12,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:12,652 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:12,653 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:13,128 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:59:13,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:13,128 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:13,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:13,128 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:59:13,129 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:59:13,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:13,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:59:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-30 10:59:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:59:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:59:13,184 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 10:59:13,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:13,185 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:59:13,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:13,185 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:59:13,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:13,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:13,185 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 10:59:13,185 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:13,185 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:13,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1191907192, now seen corresponding path program 108 times [2018-09-30 10:59:13,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:13,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:13,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:13,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:13,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:13,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:13,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:13,234 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:13,241 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:59:13,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:13,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:13,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:13,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:13,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:13,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:13,298 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:13,299 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 10:59:13,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:13,513 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:59:13,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:13,513 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:13,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:13,514 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:59:13,514 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:59:13,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:13,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:59:13,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 10:59:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:13,621 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:13,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:13,622 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:13,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:13,622 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:13,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:13,622 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:13,623 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:13,623 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:13,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1191909114, now seen corresponding path program 109 times [2018-09-30 10:59:13,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:13,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:13,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:13,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:13,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:14,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:14,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:14,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:14,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:14,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:14,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:14,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:14,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:14,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:14,122 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:14,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:14,329 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:59:14,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:14,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:14,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:14,330 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:59:14,330 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:59:14,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:59:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 10:59:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:14,422 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:59:14,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:14,423 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:14,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:14,423 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:14,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:14,423 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:14,423 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:14,424 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:14,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1193754234, now seen corresponding path program 110 times [2018-09-30 10:59:14,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:14,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:14,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:14,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:14,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:14,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:14,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:14,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:14,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:14,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:14,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:14,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:14,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:14,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:14,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:14,681 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:14,681 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:59:14,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:14,934 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:59:14,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:14,935 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:14,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:14,935 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:59:14,935 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:59:14,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:14,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:59:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 10:59:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:15,007 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:15,007 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:15,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:15,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:15,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:15,007 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:59:15,007 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:15,007 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:15,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1193756156, now seen corresponding path program 111 times [2018-09-30 10:59:15,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:15,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:15,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:15,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:15,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:15,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:15,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:15,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:15,080 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 10:59:15,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:15,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:15,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:15,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:15,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:15,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:15,142 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:15,142 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:15,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:15,364 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:59:15,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:15,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:15,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:15,365 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:59:15,365 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:59:15,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:59:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-30 10:59:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:59:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:59:15,432 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 10:59:15,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:15,432 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:59:15,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:15,432 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:59:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:15,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:15,433 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 10:59:15,433 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:15,433 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:15,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1328052742, now seen corresponding path program 112 times [2018-09-30 10:59:15,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:15,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:15,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:15,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:15,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:15,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:15,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:15,500 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:15,507 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:15,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:15,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:15,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:15,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:15,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:15,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:15,570 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:15,570 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 10:59:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:15,801 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:59:15,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:15,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:15,802 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:59:15,802 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:59:15,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:59:15,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-09-30 10:59:15,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:15,873 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:15,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:15,873 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:15,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:15,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:15,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:15,874 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:59:15,874 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:15,874 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:15,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1328050820, now seen corresponding path program 113 times [2018-09-30 10:59:15,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:15,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:15,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:15,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:15,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:15,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:15,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:16,003 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:16,011 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:59:16,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:16,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:16,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:16,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:16,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:16,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:16,065 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:16,065 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:16,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:16,273 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:59:16,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:16,273 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:16,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:16,273 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:59:16,273 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:59:16,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:16,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:59:16,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-09-30 10:59:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:16,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:16,341 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 10:59:16,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:16,341 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:16,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:16,341 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:16,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:16,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:16,341 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 10:59:16,342 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:16,342 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:16,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1326205700, now seen corresponding path program 114 times [2018-09-30 10:59:16,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:16,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:16,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:16,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:16,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:16,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:16,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:16,425 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:16,434 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:59:16,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:16,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:16,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:16,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:16,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:16,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:16,476 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:16,476 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 10:59:16,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:16,664 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 10:59:16,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:16,664 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:16,665 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:59:16,665 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:59:16,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:16,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:59:16,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-09-30 10:59:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:16,758 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 10:59:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:16,758 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:16,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:16,758 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:59:16,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:16,758 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-30 10:59:16,759 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:16,759 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:16,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1326203778, now seen corresponding path program 6 times [2018-09-30 10:59:16,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:16,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:16,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:16,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:16,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:16,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:16,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:16,834 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:16,840 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:59:16,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:16,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:16,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:16,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:59:16,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:59:16,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:59:16,888 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:16,889 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 10:59:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:17,073 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2018-09-30 10:59:17,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:59:17,073 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 10:59:17,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:17,074 INFO L225 Difference]: With dead ends: 32 [2018-09-30 10:59:17,074 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 10:59:17,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 10:59:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2018-09-30 10:59:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:59:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 10:59:17,119 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-30 10:59:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:17,119 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 10:59:17,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:59:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 10:59:17,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:17,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:17,120 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-30 10:59:17,120 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:17,120 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:17,120 INFO L82 PathProgramCache]: Analyzing trace with hash -168156555, now seen corresponding path program 7 times [2018-09-30 10:59:17,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:17,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:17,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:17,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:17,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:17,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:17,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:17,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:17,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:17,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:17,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:17,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:17,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:17,246 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:17,246 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 10 states. [2018-09-30 10:59:17,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:17,686 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:59:17,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:17,687 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:17,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:17,688 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:59:17,688 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:59:17,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:59:17,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:59:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:17,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:17,783 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:17,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:17,783 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:17,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:17,784 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:17,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:17,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:17,784 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:59:17,784 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:17,784 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:17,784 INFO L82 PathProgramCache]: Analyzing trace with hash -168154633, now seen corresponding path program 115 times [2018-09-30 10:59:17,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:17,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:17,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:17,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:17,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:17,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:17,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:17,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:17,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:17,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:17,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:17,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:17,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:17,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:17,995 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:18,308 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:59:18,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:18,309 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:18,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:18,309 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:59:18,309 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:59:18,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:59:18,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:59:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:18,409 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:18,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:18,409 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:18,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:18,409 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:18,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:18,410 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:59:18,410 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:18,410 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:18,410 INFO L82 PathProgramCache]: Analyzing trace with hash -166309513, now seen corresponding path program 116 times [2018-09-30 10:59:18,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:18,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:18,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:18,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:18,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:18,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:18,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:18,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:18,472 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:18,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:18,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:18,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:18,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:18,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:18,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:18,530 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:18,530 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:18,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:18,866 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:59:18,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:18,866 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:18,867 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:59:18,867 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:59:18,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:18,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:59:18,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:59:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:18,961 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:18,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:18,962 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:18,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:18,962 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:18,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:18,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:18,962 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:18,962 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:18,962 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:18,962 INFO L82 PathProgramCache]: Analyzing trace with hash -166307591, now seen corresponding path program 117 times [2018-09-30 10:59:18,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:18,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:18,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:18,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:18,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:19,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:19,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:19,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:19,028 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:59:19,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:19,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:19,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:19,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:19,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:19,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:19,091 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:19,091 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:19,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:19,404 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:59:19,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:19,404 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:19,405 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:59:19,405 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:59:19,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:19,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:59:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 10:59:19,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:19,485 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:59:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:19,485 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:19,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:19,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:19,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:19,485 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:59:19,485 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:19,485 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:19,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1606850807, now seen corresponding path program 118 times [2018-09-30 10:59:19,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:19,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:19,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:19,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:19,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:19,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:19,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:19,540 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:19,546 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:19,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:19,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:19,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:19,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:19,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:19,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:19,602 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:19,602 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:59:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:19,915 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:59:19,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:19,915 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:19,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:19,915 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:59:19,915 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:59:19,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:19,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:59:20,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 10:59:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:20,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:20,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:20,006 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:20,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:20,007 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:20,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:20,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:20,007 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:20,007 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:20,007 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:20,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1606852729, now seen corresponding path program 119 times [2018-09-30 10:59:20,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:20,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:20,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:20,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:20,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:20,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:20,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:20,121 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:20,131 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:59:20,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:20,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:20,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:20,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:20,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:20,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:20,178 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:20,178 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:20,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:20,494 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:59:20,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:20,494 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:20,495 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:59:20,495 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:59:20,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:59:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 10:59:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:20,579 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:20,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:20,579 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:20,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:20,579 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:20,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:20,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:20,579 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:20,579 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:20,580 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:20,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1608697849, now seen corresponding path program 120 times [2018-09-30 10:59:20,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:20,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:20,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:20,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:20,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:20,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:20,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:20,751 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:20,762 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:59:20,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:20,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:20,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:20,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:20,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:20,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:20,830 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:20,830 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:21,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:21,151 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:21,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:21,158 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:21,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:21,158 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:21,158 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:21,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:21,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:59:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:21,268 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:21,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:21,269 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:21,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:21,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:21,269 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:21,269 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:21,269 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:21,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1608699771, now seen corresponding path program 121 times [2018-09-30 10:59:21,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:21,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:21,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:21,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:21,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:21,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:21,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:21,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:21,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:21,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:21,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:21,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:21,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:21,407 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:21,407 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:21,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:21,691 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:59:21,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:21,691 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:21,692 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:59:21,692 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:59:21,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:59:21,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-30 10:59:21,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:59:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:59:21,770 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 10:59:21,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:21,770 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:59:21,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:21,770 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:59:21,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:21,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:21,771 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:59:21,771 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:21,771 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:21,771 INFO L82 PathProgramCache]: Analyzing trace with hash 511901815, now seen corresponding path program 122 times [2018-09-30 10:59:21,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:21,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:21,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:21,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:21,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:22,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:22,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:22,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:22,031 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:22,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:22,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:22,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:22,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:22,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:22,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:22,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:22,077 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 10:59:22,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:22,394 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:59:22,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:22,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:22,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:22,395 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:59:22,395 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:59:22,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:22,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:59:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:59:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:22,492 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:22,492 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:22,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:22,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:22,492 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:22,493 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:22,493 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:22,493 INFO L82 PathProgramCache]: Analyzing trace with hash 511903737, now seen corresponding path program 123 times [2018-09-30 10:59:22,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:22,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:22,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:22,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:22,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:22,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:22,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:22,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:22,561 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:59:22,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:22,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:22,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:22,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:22,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:22,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:22,617 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:22,617 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:22,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:22,944 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:59:22,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:22,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:22,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:22,945 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:59:22,945 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:59:22,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:59:23,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:59:23,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:23,042 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:23,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:23,042 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:23,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:23,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:23,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:23,042 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:23,042 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:23,042 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:23,043 INFO L82 PathProgramCache]: Analyzing trace with hash 513748857, now seen corresponding path program 124 times [2018-09-30 10:59:23,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:23,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:23,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:23,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:23,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:23,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:23,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:23,100 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:23,105 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:23,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:23,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:23,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:23,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:23,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:23,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:23,157 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:23,157 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:23,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:23,496 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:59:23,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:23,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:23,497 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:59:23,497 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:59:23,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:59:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:59:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:23,598 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:23,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:23,598 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:23,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:23,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:23,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:23,598 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:23,598 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:23,598 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:23,598 INFO L82 PathProgramCache]: Analyzing trace with hash 513750779, now seen corresponding path program 125 times [2018-09-30 10:59:23,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:23,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:23,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:23,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:23,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:23,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:23,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:23,654 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:23,673 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:59:23,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:23,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:23,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:23,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:23,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:23,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:23,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:23,773 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:24,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:24,104 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:59:24,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:24,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:24,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:24,105 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:59:24,105 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:59:24,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:24,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:59:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 10:59:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:24,195 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:59:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:24,195 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:24,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:24,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:24,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:24,196 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:24,196 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:24,196 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:24,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2008058119, now seen corresponding path program 126 times [2018-09-30 10:59:24,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:24,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:24,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:24,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:24,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:24,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:24,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:24,274 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:24,284 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:59:24,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:24,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:24,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:24,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:24,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:24,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:24,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:24,352 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:59:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:24,668 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:59:24,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:24,669 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:24,669 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:59:24,669 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:59:24,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:59:24,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 10:59:24,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:24,765 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:24,765 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:24,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:24,765 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:24,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:24,766 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:24,766 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:24,766 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:24,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2008056197, now seen corresponding path program 127 times [2018-09-30 10:59:24,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:24,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:24,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:24,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:24,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:25,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:25,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:25,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:25,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:25,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:25,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:25,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:25,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:25,835 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:25,835 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:26,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:26,183 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:59:26,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:26,183 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:26,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:26,184 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:59:26,184 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:59:26,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:59:26,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 10:59:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:26,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:26,279 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:26,279 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:26,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:26,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:26,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:26,280 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:26,280 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:26,280 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:26,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2006211077, now seen corresponding path program 128 times [2018-09-30 10:59:26,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:26,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:26,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:26,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:26,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:26,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:26,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:26,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:26,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:26,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:26,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:26,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:26,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:26,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:26,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:26,526 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:26,526 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:26,838 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:26,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:26,839 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:26,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:26,839 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:26,839 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:26,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:26,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:26,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:59:26,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:26,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:26,942 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:26,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:26,942 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:26,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:26,942 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:26,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:26,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:26,943 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:26,943 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:26,943 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:26,943 INFO L82 PathProgramCache]: Analyzing trace with hash -2006209155, now seen corresponding path program 129 times [2018-09-30 10:59:26,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:26,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:26,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:26,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:26,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:27,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:27,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:27,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:27,091 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:59:27,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:27,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:27,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:27,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:27,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:27,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:27,142 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:27,142 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:27,426 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:59:27,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:27,427 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:27,427 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:59:27,427 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:59:27,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:27,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:59:27,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-30 10:59:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:59:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:59:27,504 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-30 10:59:27,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:27,504 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:59:27,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:59:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:27,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:27,504 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:59:27,504 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:27,504 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:27,505 INFO L82 PathProgramCache]: Analyzing trace with hash 532908023, now seen corresponding path program 130 times [2018-09-30 10:59:27,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:27,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:27,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:27,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:27,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:27,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:27,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:27,559 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:27,564 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:27,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:27,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:27,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:27,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:27,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:27,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:27,632 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:27,632 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-30 10:59:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:27,942 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:27,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:27,942 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:27,943 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:27,943 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:27,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:27,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:59:28,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:28,051 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:28,051 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:28,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:28,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:28,051 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:28,052 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:28,052 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:28,052 INFO L82 PathProgramCache]: Analyzing trace with hash 532909945, now seen corresponding path program 131 times [2018-09-30 10:59:28,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:28,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:28,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:28,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:28,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:28,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:28,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:28,109 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:28,116 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:59:28,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:28,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:28,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:28,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:28,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:28,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:28,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:28,221 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:28,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:28,533 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:28,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:28,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:28,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:28,534 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:28,534 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:28,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:28,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:28,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 10:59:28,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:28,638 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:28,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:28,639 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:28,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:28,639 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:28,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:28,639 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:28,639 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:28,639 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:28,639 INFO L82 PathProgramCache]: Analyzing trace with hash 534755065, now seen corresponding path program 132 times [2018-09-30 10:59:28,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:28,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:28,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:28,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:28,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:28,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:28,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:28,706 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:28,716 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:59:28,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:28,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:28,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:28,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:28,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:28,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:28,761 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:28,761 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:29,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:29,073 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:59:29,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:29,074 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:29,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:29,074 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:59:29,074 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:59:29,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:29,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:59:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 10:59:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:29,181 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:29,182 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:29,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:29,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:29,182 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:29,182 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:29,182 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:29,182 INFO L82 PathProgramCache]: Analyzing trace with hash 534756987, now seen corresponding path program 133 times [2018-09-30 10:59:29,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:29,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:29,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:29,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:29,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:29,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:29,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:29,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:29,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:29,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:29,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:29,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:29,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:29,293 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:29,293 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:29,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:29,588 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:59:29,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:29,588 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:29,589 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:59:29,589 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:59:29,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:29,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:59:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 10:59:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:29,685 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:59:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:29,685 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:29,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:29,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:29,685 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:29,686 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:29,686 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:29,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051911, now seen corresponding path program 134 times [2018-09-30 10:59:29,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:29,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:29,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:29,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:29,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:29,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:29,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:29,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:29,749 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:29,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:29,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:29,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:29,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:29,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:29,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:29,802 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:29,802 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:59:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:30,135 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:30,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:30,135 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:30,136 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:30,136 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:30,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:30,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:30,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:59:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:30,238 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:30,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:30,238 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:30,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:30,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:30,239 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:30,239 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:30,239 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1987049989, now seen corresponding path program 135 times [2018-09-30 10:59:30,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:30,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:30,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:30,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:30,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:30,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:30,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:30,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:30,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:59:30,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:30,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:30,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:30,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:30,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:30,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:30,358 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:30,358 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:30,676 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:30,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:30,676 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:30,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:30,677 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:30,677 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:30,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:30,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 10:59:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:30,784 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:30,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:30,784 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:30,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:30,784 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:30,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:30,785 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:30,785 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:30,785 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:30,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1985204869, now seen corresponding path program 136 times [2018-09-30 10:59:30,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:30,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:30,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:30,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:30,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:31,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:31,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:31,042 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:31,068 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:31,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:31,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:31,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:31,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:31,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:31,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:31,234 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:31,234 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:31,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:31,552 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:59:31,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:31,552 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:31,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:31,553 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:59:31,553 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:59:31,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:31,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:59:31,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 10:59:31,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:31,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:31,670 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:31,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:31,671 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:31,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:31,671 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:31,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:31,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:31,671 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:31,671 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:31,671 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:31,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1985202947, now seen corresponding path program 137 times [2018-09-30 10:59:31,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:31,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:31,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:31,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:31,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:31,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:31,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:31,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:31,737 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:59:31,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:31,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:31,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:31,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:31,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:31,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:31,810 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:31,810 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:32,109 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:59:32,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:32,109 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:32,110 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:59:32,110 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:59:32,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:32,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:59:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 10:59:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:59:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:59:32,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 10:59:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:32,192 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:59:32,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:32,192 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:59:32,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:32,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:32,192 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:32,192 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:32,192 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:32,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1212966393, now seen corresponding path program 138 times [2018-09-30 10:59:32,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:32,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:32,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:32,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:32,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:32,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:32,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:32,248 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:32,257 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:59:32,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:32,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:32,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:32,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:32,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:32,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:32,314 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:32,314 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 10:59:32,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:32,610 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:59:32,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:32,610 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:32,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:32,611 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:59:32,611 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:59:32,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:59:32,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 10:59:32,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:32,723 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:32,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:32,723 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:32,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:32,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:32,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:32,724 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:32,724 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:32,724 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:32,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1212968315, now seen corresponding path program 139 times [2018-09-30 10:59:32,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:32,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:32,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:32,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:32,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:32,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:32,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:32,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:32,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:32,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:32,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:32,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:32,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:32,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:32,882 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:33,168 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:59:33,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:33,168 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:33,169 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:59:33,169 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:59:33,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:59:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 10:59:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:33,289 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:33,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:33,289 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:33,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:33,289 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:33,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:33,290 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:33,290 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:33,290 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1214813435, now seen corresponding path program 140 times [2018-09-30 10:59:33,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:33,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:33,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:33,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:33,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:33,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:33,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:33,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:33,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:33,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:33,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:33,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:33,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:33,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:33,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:33,440 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:33,441 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:33,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:33,748 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:59:33,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:33,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:33,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:33,749 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:59:33,749 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:59:33,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:59:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 10:59:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:33,868 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:33,868 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:33,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:33,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:33,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:33,868 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:33,868 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:33,869 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:33,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1214815357, now seen corresponding path program 141 times [2018-09-30 10:59:33,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:33,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:33,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:33,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:33,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:33,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:33,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:33,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:33,939 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:59:33,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:33,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:34,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:34,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:34,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:34,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:34,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:34,002 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:34,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:34,301 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:59:34,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:34,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:34,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:34,301 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:59:34,301 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:59:34,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:34,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:59:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 10:59:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:34,402 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:59:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:34,402 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:34,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:34,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:34,402 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:34,403 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:34,403 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:34,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1306993541, now seen corresponding path program 142 times [2018-09-30 10:59:34,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:34,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:34,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:34,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:34,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:34,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:34,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:34,463 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:34,469 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:34,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:34,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:34,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:34,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:34,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:34,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:34,533 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:34,533 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:59:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:34,823 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:59:34,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:34,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:34,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:34,824 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:59:34,824 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:59:34,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:34,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:59:34,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-30 10:59:34,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:34,937 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:34,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:34,938 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:34,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:34,938 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:34,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:34,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:34,938 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:34,938 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:34,938 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:34,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1306991619, now seen corresponding path program 143 times [2018-09-30 10:59:34,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:34,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:34,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:34,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:34,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:34,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:34,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:34,994 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:35,003 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:59:35,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:35,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:35,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:35,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:35,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:35,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:35,052 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:35,053 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:35,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:35,330 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:59:35,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:35,330 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:35,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:35,331 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:59:35,331 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:59:35,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:59:35,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-30 10:59:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:35,440 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:35,440 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:35,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:35,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:35,441 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:35,441 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:35,441 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:35,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1305146499, now seen corresponding path program 144 times [2018-09-30 10:59:35,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:35,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:35,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:35,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:35,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:35,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:35,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:35,505 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:35,512 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:59:35,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:35,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:35,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:35,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:35,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:35,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:35,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:35,566 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:35,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:35,880 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:59:35,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:35,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:35,880 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:59:35,880 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:59:35,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:35,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:59:36,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-30 10:59:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:36,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:36,001 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:36,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:36,001 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:36,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:36,001 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:36,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:36,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:36,002 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:36,002 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:36,002 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:36,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1305144577, now seen corresponding path program 145 times [2018-09-30 10:59:36,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:36,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:36,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:36,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:36,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:36,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:36,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:36,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:36,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:36,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:36,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:36,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:36,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:36,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:36,156 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:36,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:36,428 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-30 10:59:36,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:36,429 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:36,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:36,429 INFO L225 Difference]: With dead ends: 34 [2018-09-30 10:59:36,429 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:59:36,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:36,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:59:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-30 10:59:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:59:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:59:36,497 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-30 10:59:36,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:36,498 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:59:36,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:36,498 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:59:36,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:36,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:36,498 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:59:36,498 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:36,498 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:36,498 INFO L82 PathProgramCache]: Analyzing trace with hash -754962569, now seen corresponding path program 146 times [2018-09-30 10:59:36,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:36,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:36,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:36,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:36,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:36,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:36,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:36,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:36,569 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:36,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:36,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:36,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:36,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:36,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:36,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:36,642 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:36,642 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-30 10:59:37,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:37,018 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:59:37,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:37,018 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:37,019 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:59:37,019 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:59:37,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:37,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:59:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:59:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:37,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:37,140 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:37,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:37,140 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:37,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:37,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:37,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:37,141 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:37,141 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:37,141 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash -754960647, now seen corresponding path program 147 times [2018-09-30 10:59:37,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:37,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:37,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:37,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:37,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:37,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:37,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:37,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:37,205 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:59:37,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:37,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:37,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:37,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:37,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:37,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:37,267 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:37,267 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:37,656 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:59:37,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:37,656 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:37,657 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:59:37,657 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:59:37,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:59:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:59:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:37,841 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:37,841 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:37,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:37,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:37,842 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:37,842 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:37,842 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:37,842 INFO L82 PathProgramCache]: Analyzing trace with hash -753115527, now seen corresponding path program 148 times [2018-09-30 10:59:37,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:37,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:37,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:37,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:37,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:38,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:38,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:38,021 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:38,026 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:38,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:38,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:38,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:38,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:38,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:38,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:38,070 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:38,070 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:38,462 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:59:38,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:38,462 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:38,463 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:59:38,463 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:59:38,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:38,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:59:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:59:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:38,582 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:38,583 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:38,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:38,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:38,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:38,583 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:38,583 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:38,583 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:38,583 INFO L82 PathProgramCache]: Analyzing trace with hash -753113605, now seen corresponding path program 149 times [2018-09-30 10:59:38,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:38,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:38,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:38,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:38,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:38,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:38,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:38,650 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:38,658 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:59:38,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:38,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:38,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:38,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:38,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:38,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:38,712 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:38,712 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:39,088 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:59:39,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:39,089 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:39,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:39,089 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:59:39,089 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:59:39,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:59:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 10:59:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:39,204 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:59:39,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:39,205 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:39,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:39,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:39,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:39,205 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:39,205 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:39,205 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:39,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1020044793, now seen corresponding path program 150 times [2018-09-30 10:59:39,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:39,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:39,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:39,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:39,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:39,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:39,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:39,321 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:39,330 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:59:39,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:39,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:39,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:39,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:39,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:39,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:39,386 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:39,386 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:59:39,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:39,754 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:59:39,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:39,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:39,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:39,755 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:59:39,755 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:59:39,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:59:39,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 10:59:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:39,885 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:39,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:39,885 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:39,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:39,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:39,886 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:39,886 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:39,886 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:39,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1020046715, now seen corresponding path program 151 times [2018-09-30 10:59:39,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:39,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:39,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:39,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:39,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:39,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:39,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:39,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:39,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:40,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:40,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:40,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:40,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:40,009 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:40,009 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:40,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:40,378 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:59:40,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:40,378 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:40,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:40,379 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:59:40,379 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:59:40,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:40,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:59:40,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 10:59:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:40,513 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:40,513 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:40,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:40,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:40,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:40,513 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:40,513 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:40,513 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:40,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1021891835, now seen corresponding path program 152 times [2018-09-30 10:59:40,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:40,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:40,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:40,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:40,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:40,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:40,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:40,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:40,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:40,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:40,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:40,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:40,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:40,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:40,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:40,640 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:40,640 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:40,970 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:40,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:40,970 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:40,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:40,970 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:40,970 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:40,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:40,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:41,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:59:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:41,137 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:41,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:41,137 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:41,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:41,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:41,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:41,137 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:41,138 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:41,138 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:41,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1021893757, now seen corresponding path program 153 times [2018-09-30 10:59:41,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:41,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:41,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:41,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:41,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:41,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:41,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:41,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:41,210 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:59:41,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:41,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:41,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:41,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:41,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:41,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:41,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:41,280 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:41,652 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:59:41,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:41,652 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:41,653 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:59:41,653 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:59:41,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:59:41,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-30 10:59:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:59:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:59:41,755 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 10:59:41,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:41,755 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:59:41,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:59:41,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:41,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:41,756 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:41,756 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:41,756 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:41,756 INFO L82 PathProgramCache]: Analyzing trace with hash -74904199, now seen corresponding path program 154 times [2018-09-30 10:59:41,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:41,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:41,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:41,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:41,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:41,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:41,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:41,811 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:41,838 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:41,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:41,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:41,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:41,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:41,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:41,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:41,893 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:41,893 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 10:59:42,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:42,289 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:59:42,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:42,290 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:42,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:42,290 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:59:42,290 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:59:42,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:42,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:59:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:59:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:42,416 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:42,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:42,416 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:42,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:42,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:42,417 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:42,417 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:42,417 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash -74902277, now seen corresponding path program 155 times [2018-09-30 10:59:42,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:42,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:42,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:42,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:42,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:42,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:42,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:42,475 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:42,484 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:59:42,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:42,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:42,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:42,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:42,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:42,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:42,539 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:42,539 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:42,931 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:59:42,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:42,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:42,932 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:59:42,932 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:59:42,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:59:43,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 10:59:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:43,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:43,060 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:43,060 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:43,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:43,060 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:43,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:43,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:43,060 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:43,060 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:43,061 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:43,061 INFO L82 PathProgramCache]: Analyzing trace with hash -73057157, now seen corresponding path program 156 times [2018-09-30 10:59:43,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:43,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:43,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:43,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:43,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:43,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:43,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:43,138 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:43,147 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:59:43,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:43,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:43,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:43,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:43,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:43,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:43,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:43,210 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:43,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:43,600 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 10:59:43,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:43,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:43,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:43,601 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:59:43,601 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:59:43,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:59:43,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 10:59:43,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:43,736 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:43,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:43,736 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:43,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:43,736 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:43,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:43,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:43,736 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:43,737 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:43,737 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:43,737 INFO L82 PathProgramCache]: Analyzing trace with hash -73055235, now seen corresponding path program 157 times [2018-09-30 10:59:43,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:43,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:43,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:43,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:43,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:43,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:43,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:43,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:43,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:43,855 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:43,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:43,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:43,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:43,856 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:43,856 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:44,254 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 10:59:44,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:44,255 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:44,255 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:59:44,255 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:59:44,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:44,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:59:44,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 10:59:44,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:44,365 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:59:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:44,365 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:44,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:44,366 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:44,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:44,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:44,366 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:44,366 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:44,366 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:44,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1700103163, now seen corresponding path program 158 times [2018-09-30 10:59:44,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:44,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:44,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:44,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:44,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:44,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:44,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:44,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:44,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:44,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:44,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:44,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:44,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:44,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:44,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:44,485 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:44,486 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:59:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:44,867 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:59:44,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:44,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:44,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:44,868 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:59:44,868 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:59:44,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:59:44,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 10:59:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:44,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:44,996 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:44,997 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:44,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:44,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:44,997 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:44,997 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:44,997 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:44,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1700105085, now seen corresponding path program 159 times [2018-09-30 10:59:44,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:44,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:44,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:44,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:44,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:45,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:45,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:45,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:45,063 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:59:45,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:45,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:45,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:45,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:45,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:45,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:45,139 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:45,140 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:45,514 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 10:59:45,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:45,515 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:45,515 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:59:45,515 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:59:45,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:45,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:59:45,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 10:59:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:45,638 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:45,638 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:45,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:45,639 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:45,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:45,639 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:45,639 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:45,639 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:45,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1701950205, now seen corresponding path program 160 times [2018-09-30 10:59:45,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:45,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:45,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:45,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:45,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:45,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:45,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:45,696 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:45,703 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:45,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:45,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:45,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:45,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:45,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:45,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:45,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:45,759 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:46,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:46,136 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:46,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:46,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:46,137 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:46,137 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:46,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:46,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:59:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:46,280 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:46,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:46,280 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:46,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:46,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:46,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:46,281 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:46,281 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:46,281 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:46,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1701952127, now seen corresponding path program 161 times [2018-09-30 10:59:46,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:46,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:46,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:46,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:46,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:46,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:46,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:46,387 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:46,417 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:59:46,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:46,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:46,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:46,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:46,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:46,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:46,490 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:46,490 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:47,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:47,364 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:59:47,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:47,364 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:47,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:47,364 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:59:47,365 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:59:47,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:59:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-30 10:59:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:59:47,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 10:59:47,507 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-30 10:59:47,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:47,507 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 10:59:47,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:47,507 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 10:59:47,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:47,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:47,508 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:47,508 INFO L423 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:47,508 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:47,508 INFO L82 PathProgramCache]: Analyzing trace with hash -53897991, now seen corresponding path program 162 times [2018-09-30 10:59:47,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:47,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:47,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:47,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:47,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:47,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:47,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:47,591 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:47,600 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:59:47,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:47,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:47,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:47,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:47,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:47,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:47,656 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:47,656 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-30 10:59:48,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:48,024 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:48,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:48,024 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:48,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:48,025 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:48,025 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:48,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:59:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:48,167 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:48,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:48,167 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:48,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:48,167 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:48,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:48,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:48,167 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:48,167 INFO L423 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:48,167 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:48,168 INFO L82 PathProgramCache]: Analyzing trace with hash -53896069, now seen corresponding path program 163 times [2018-09-30 10:59:48,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:48,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:48,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:48,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:48,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:48,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:48,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:48,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:48,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:48,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:48,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:48,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:48,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:48,350 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:48,350 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:48,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:48,910 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:48,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:48,911 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:48,911 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:48,911 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:48,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:48,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 10:59:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:49,041 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:49,041 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:49,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:49,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:49,041 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:49,041 INFO L423 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:49,042 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:49,042 INFO L82 PathProgramCache]: Analyzing trace with hash -52050949, now seen corresponding path program 164 times [2018-09-30 10:59:49,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:49,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:49,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:49,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:49,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:49,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:49,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:49,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:49,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:49,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:49,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:49,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:49,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:49,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:49,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:49,167 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:49,167 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:49,533 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:59:49,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:49,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:49,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:49,534 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:59:49,534 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:59:49,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:49,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:59:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 10:59:49,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:49,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:49,677 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:49,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:49,677 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:49,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:49,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:49,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:49,678 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:49,678 INFO L423 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:49,678 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:49,678 INFO L82 PathProgramCache]: Analyzing trace with hash -52049027, now seen corresponding path program 165 times [2018-09-30 10:59:49,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:49,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:49,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:49,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:49,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:49,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:49,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:49,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:49,743 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:59:49,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:49,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:49,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:49,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:49,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:49,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:49,793 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:49,793 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:50,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:50,135 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:59:50,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:50,135 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:50,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:50,136 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:59:50,136 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:59:50,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:50,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:59:50,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 10:59:50,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:50,258 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:59:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:50,258 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:50,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:50,258 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:50,259 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:50,259 INFO L423 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:50,259 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:50,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1721109371, now seen corresponding path program 166 times [2018-09-30 10:59:50,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:50,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:50,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:50,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:50,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:50,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:50,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:50,318 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:50,324 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:50,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:50,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:50,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:50,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:50,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:50,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:50,376 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:50,376 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:59:50,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:50,752 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:50,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:50,752 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:50,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:50,753 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:50,753 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:50,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:50,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 10:59:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:50,895 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:50,895 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:50,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:50,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:50,896 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:50,896 INFO L423 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:50,896 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:50,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1721111293, now seen corresponding path program 167 times [2018-09-30 10:59:50,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:50,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:50,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:50,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:50,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:50,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:50,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:50,951 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:50,962 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:59:50,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:50,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:51,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:51,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:51,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:51,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:51,019 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:51,019 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:51,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:51,388 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 10:59:51,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:51,388 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:51,388 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:59:51,388 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:59:51,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:59:51,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 10:59:51,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:51,515 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:51,515 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:51,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:51,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:51,515 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:51,515 INFO L423 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:51,516 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:51,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1722956413, now seen corresponding path program 168 times [2018-09-30 10:59:51,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:51,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:51,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:51,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:51,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:51,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:51,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:51,582 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:51,591 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:59:51,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:51,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:51,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:51,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:51,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:51,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:51,645 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:51,645 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:52,002 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 10:59:52,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:52,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:52,003 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:59:52,003 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:59:52,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:59:52,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 10:59:52,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:52,137 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:52,137 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:52,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:52,138 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:52,138 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:52,138 INFO L423 AbstractCegarLoop]: === Iteration 183 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:52,138 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:52,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1722958335, now seen corresponding path program 169 times [2018-09-30 10:59:52,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:52,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:52,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:52,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:52,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:52,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:52,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:52,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:52,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:52,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:52,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:52,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:52,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:52,254 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:52,254 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:52,610 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:59:52,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:52,610 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:52,611 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:59:52,611 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:59:52,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:52,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:59:52,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 10:59:52,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:59:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 10:59:52,725 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 10:59:52,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:52,726 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 10:59:52,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:52,726 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 10:59:52,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:52,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:52,726 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:52,726 INFO L423 AbstractCegarLoop]: === Iteration 184 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:52,727 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:52,727 INFO L82 PathProgramCache]: Analyzing trace with hash 626160379, now seen corresponding path program 170 times [2018-09-30 10:59:52,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:52,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:52,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:52,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:52,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:52,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:52,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:52,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:52,907 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:52,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:52,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:52,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:52,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:52,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:52,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:52,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:52,951 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 10:59:53,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:53,284 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:59:53,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:53,285 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:53,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:53,285 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:59:53,285 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:59:53,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:53,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:59:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 10:59:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:53,429 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:53,430 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:53,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:53,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:53,430 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:53,430 INFO L423 AbstractCegarLoop]: === Iteration 185 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:53,430 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash 626162301, now seen corresponding path program 171 times [2018-09-30 10:59:53,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:53,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:53,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:53,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:53,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:53,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:53,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:53,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:53,497 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:59:53,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:53,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:53,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:53,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:53,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:53,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:53,552 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:53,552 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:53,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:53,956 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:59:53,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:53,956 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:53,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:53,957 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:59:53,957 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:59:53,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:53,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:59:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 10:59:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:54,090 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:54,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:54,090 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:54,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:54,090 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:54,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:54,091 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:54,091 INFO L423 AbstractCegarLoop]: === Iteration 186 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:54,091 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:54,091 INFO L82 PathProgramCache]: Analyzing trace with hash 628007421, now seen corresponding path program 172 times [2018-09-30 10:59:54,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:54,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:54,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:54,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:54,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:54,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:54,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:54,152 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:54,157 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:54,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:54,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:54,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:54,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:54,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:54,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:54,209 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:54,209 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:54,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:54,561 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 10:59:54,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:54,562 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:54,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:54,562 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:59:54,562 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:59:54,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:54,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:59:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 10:59:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:54,710 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:54,710 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:54,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:54,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:54,711 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:54,711 INFO L423 AbstractCegarLoop]: === Iteration 187 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:54,711 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash 628009343, now seen corresponding path program 173 times [2018-09-30 10:59:54,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:54,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:54,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:54,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:54,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:54,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:54,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:54,765 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:54,773 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:59:54,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:54,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:54,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:54,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:54,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:54,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:54,852 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:54,852 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:55,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:55,181 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 10:59:55,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:55,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:55,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:55,182 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:59:55,182 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:59:55,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:55,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:59:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 10:59:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:59:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 10:59:55,306 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 10:59:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:55,306 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 10:59:55,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 10:59:55,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:55,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:55,307 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 10:59:55,307 INFO L423 AbstractCegarLoop]: === Iteration 188 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:55,307 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:55,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1893799555, now seen corresponding path program 174 times [2018-09-30 10:59:55,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:55,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:55,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:55,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:55,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:55,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:55,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:55,375 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:55,397 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:59:55,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:55,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:55,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:55,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:55,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:55,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:55,453 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:55,453 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 10:59:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:55,794 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:59:55,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:55,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:55,795 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:59:55,795 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:59:55,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:55,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:59:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-30 10:59:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:55,930 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:55,930 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:55,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:55,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:55,930 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:55,931 INFO L423 AbstractCegarLoop]: === Iteration 189 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:55,931 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:55,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1893797633, now seen corresponding path program 175 times [2018-09-30 10:59:55,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:55,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:55,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:55,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:55,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:55,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:55,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:56,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:56,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:56,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:56,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:56,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:56,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:56,061 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:56,061 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:56,388 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 10:59:56,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:56,388 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:56,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:56,388 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:59:56,388 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:59:56,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:59:56,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-30 10:59:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:59:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 10:59:56,530 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 10:59:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:56,530 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 10:59:56,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:56,531 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 10:59:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:56,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:56,531 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:56,531 INFO L423 AbstractCegarLoop]: === Iteration 190 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:56,531 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:56,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1891952513, now seen corresponding path program 176 times [2018-09-30 10:59:56,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:56,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:56,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:56,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:59:56,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:56,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:56,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:56,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:59:56,614 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:59:56,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:56,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:56,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:56,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:56,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:56,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:56,681 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:56,681 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 10:59:57,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:57,019 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 10:59:57,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:57,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:57,020 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:59:57,020 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:59:57,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:57,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:59:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-30 10:59:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:57,167 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:57,167 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:57,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:57,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:57,167 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:59:57,168 INFO L423 AbstractCegarLoop]: === Iteration 191 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:57,168 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:57,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1891950591, now seen corresponding path program 177 times [2018-09-30 10:59:57,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:57,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:57,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:57,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:57,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:57,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:57,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:57,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:59:57,247 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 10:59:57,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:57,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:57,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:57,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:57,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:57,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:57,311 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:57,311 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:57,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:57,586 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-30 10:59:57,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:57,587 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:57,587 INFO L225 Difference]: With dead ends: 34 [2018-09-30 10:59:57,587 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:59:57,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:59:57,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-30 10:59:57,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:59:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 10:59:57,679 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-30 10:59:57,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:57,679 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 10:59:57,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:57,680 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 10:59:57,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:57,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:57,680 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 10:59:57,680 INFO L423 AbstractCegarLoop]: === Iteration 192 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:57,680 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:57,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1448020233, now seen corresponding path program 178 times [2018-09-30 10:59:57,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:57,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:57,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:57,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:57,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:57,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:57,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:57,755 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:59:57,761 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:59:57,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:57,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:57,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:57,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:57,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:57,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:57,821 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:57,821 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-30 10:59:58,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:58,307 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:59:58,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:58,307 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:58,308 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:59:58,308 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:59:58,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:58,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:59:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 10:59:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:59:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 10:59:58,486 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 10:59:58,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:58,486 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 10:59:58,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 10:59:58,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:58,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:58,486 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:58,487 INFO L423 AbstractCegarLoop]: === Iteration 193 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:58,487 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:58,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1448018311, now seen corresponding path program 179 times [2018-09-30 10:59:58,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:58,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:58,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:58,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:58,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:58,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:58,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:58,551 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:59:58,559 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 10:59:58,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:58,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:58,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:58,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:58,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:58,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:58,624 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:58,624 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 10:59:59,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:59,150 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 10:59:59,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:59,150 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:59,151 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:59:59,151 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:59:59,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:59:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 10:59:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:59:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 10:59:59,324 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 10:59:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:59:59,324 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 10:59:59,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:59:59,324 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 10:59:59,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:59:59,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:59:59,325 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 10:59:59,325 INFO L423 AbstractCegarLoop]: === Iteration 194 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:59:59,325 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:59:59,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1446173191, now seen corresponding path program 180 times [2018-09-30 10:59:59,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:59:59,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:59:59,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:59,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:59:59,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:59:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:59:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:59,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:59:59,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:59:59,383 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:59:59,391 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:59:59,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:59:59,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:59:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:59:59,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:59:59,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:59:59,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:59:59,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:59:59,462 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:59:59,462 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 10:59:59,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:59:59,954 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 10:59:59,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:59:59,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 10:59:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:59:59,955 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:59:59,955 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:59:59,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:59:59,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:00:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 11:00:00,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:00,156 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:00,156 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:00,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:00,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:00,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:00,157 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:00,157 INFO L423 AbstractCegarLoop]: === Iteration 195 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:00,157 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:00,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1446171269, now seen corresponding path program 181 times [2018-09-30 11:00:00,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:00,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:00,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:00,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:00,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:00,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:00,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:00,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:00,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:00,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:00,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:00,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:00,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:00,270 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:00,270 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:00,756 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:00:00,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:00,762 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:00,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:00,762 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:00:00,762 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:00:00,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:00,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:00:00,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-30 11:00:00,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:00:00,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 11:00:00,910 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 11:00:00,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:00,910 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 11:00:00,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:00,911 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 11:00:00,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:00,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:00,911 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:00,911 INFO L423 AbstractCegarLoop]: === Iteration 196 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:00,911 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:00,912 INFO L82 PathProgramCache]: Analyzing trace with hash 326987129, now seen corresponding path program 182 times [2018-09-30 11:00:00,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:00,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:00,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:00,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:00,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:00,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:00,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:00,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:00,976 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:00,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:00,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:01,057 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:01,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:01,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:01,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:01,058 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:01,058 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 11:00:01,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:01,563 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 11:00:01,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:01,563 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:01,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:01,564 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:00:01,564 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:00:01,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:01,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:00:01,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 11:00:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:01,731 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:01,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:01,731 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:01,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:01,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:01,732 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:01,732 INFO L423 AbstractCegarLoop]: === Iteration 197 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:01,732 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:01,732 INFO L82 PathProgramCache]: Analyzing trace with hash 326989051, now seen corresponding path program 183 times [2018-09-30 11:00:01,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:01,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:01,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:01,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:01,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:01,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:01,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:01,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:01,813 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 11:00:01,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:01,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:01,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:01,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:01,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:01,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:01,881 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:01,881 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:02,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:02,413 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 11:00:02,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:02,413 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:02,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:02,413 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:00:02,413 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:00:02,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:00:02,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 11:00:02,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:02,574 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:02,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:02,574 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:02,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:02,574 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:02,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:02,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:02,575 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:02,575 INFO L423 AbstractCegarLoop]: === Iteration 198 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:02,575 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:02,575 INFO L82 PathProgramCache]: Analyzing trace with hash 328834171, now seen corresponding path program 184 times [2018-09-30 11:00:02,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:02,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:02,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:02,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:02,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:02,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:02,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:02,635 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:02,663 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:02,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:02,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:03,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:03,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:03,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:03,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:03,049 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:03,049 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:03,533 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:00:03,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:03,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:03,534 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:00:03,534 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:00:03,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:00:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 11:00:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:03,700 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:03,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:03,700 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:03,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:03,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:03,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:03,700 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:03,700 INFO L423 AbstractCegarLoop]: === Iteration 199 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:03,700 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:03,701 INFO L82 PathProgramCache]: Analyzing trace with hash 328836093, now seen corresponding path program 185 times [2018-09-30 11:00:03,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:03,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:03,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:03,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:03,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:03,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:03,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:03,759 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:03,767 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 11:00:03,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:03,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:03,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:03,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:03,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:03,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:03,847 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:03,847 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:04,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:04,596 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:00:04,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:04,596 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:04,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:04,597 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:00:04,597 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:00:04,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:04,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:00:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-30 11:00:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 11:00:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 11:00:04,745 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 11:00:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:04,745 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 11:00:04,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 11:00:04,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:04,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:04,746 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:04,746 INFO L423 AbstractCegarLoop]: === Iteration 200 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:04,746 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:04,746 INFO L82 PathProgramCache]: Analyzing trace with hash -767961863, now seen corresponding path program 186 times [2018-09-30 11:00:04,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:04,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:04,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:04,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:04,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:05,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:05,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:05,296 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:05,352 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 11:00:05,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:05,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:05,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:05,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:05,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:05,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:05,417 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:05,417 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 11:00:05,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:05,907 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:00:05,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:05,908 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:05,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:05,908 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:00:05,908 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:00:05,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:05,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:00:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 11:00:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:06,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:06,089 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:06,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:06,089 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:06,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:06,090 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:06,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:06,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:06,090 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:06,090 INFO L423 AbstractCegarLoop]: === Iteration 201 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:06,090 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:06,090 INFO L82 PathProgramCache]: Analyzing trace with hash -767959941, now seen corresponding path program 187 times [2018-09-30 11:00:06,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:06,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:06,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:06,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:06,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:06,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:06,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:06,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:06,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:06,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:06,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:06,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:06,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:06,205 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:06,205 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:06,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:06,669 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:00:06,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:06,669 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:06,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:06,670 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:00:06,670 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:00:06,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:06,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:00:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 11:00:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:06,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:06,842 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:06,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:06,842 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:06,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:06,842 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:06,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:06,843 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:06,843 INFO L423 AbstractCegarLoop]: === Iteration 202 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:06,843 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:06,843 INFO L82 PathProgramCache]: Analyzing trace with hash -766114821, now seen corresponding path program 188 times [2018-09-30 11:00:06,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:06,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:06,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:06,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:06,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:06,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:06,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:06,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:06,961 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:06,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:06,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:07,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:07,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:07,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:07,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:07,026 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:07,026 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:07,530 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:00:07,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:07,530 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:07,531 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:00:07,531 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:00:07,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:07,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:00:07,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 11:00:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:07,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:07,700 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:07,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:07,700 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:07,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:07,700 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:07,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:07,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:07,701 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:07,701 INFO L423 AbstractCegarLoop]: === Iteration 203 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:07,701 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:07,701 INFO L82 PathProgramCache]: Analyzing trace with hash -766112899, now seen corresponding path program 189 times [2018-09-30 11:00:07,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:07,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:07,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:07,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:07,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:07,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:07,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:07,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:07,770 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 11:00:07,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:07,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:07,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:07,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:07,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:07,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:07,836 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:07,836 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:08,378 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:00:08,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:08,378 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:08,379 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:00:08,379 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:00:08,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:00:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-30 11:00:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:00:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 11:00:08,532 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 11:00:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:08,532 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 11:00:08,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:08,532 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 11:00:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:08,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:08,533 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:08,533 INFO L423 AbstractCegarLoop]: === Iteration 204 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:08,533 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:08,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1007045499, now seen corresponding path program 190 times [2018-09-30 11:00:08,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:08,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:08,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:08,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:08,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:08,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:08,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:08,600 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:08,607 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:08,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:08,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:08,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:08,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:08,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:08,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:08,671 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:08,671 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 11:00:09,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:09,136 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:00:09,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:09,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:09,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:09,136 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:00:09,137 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:00:09,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:09,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:00:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 11:00:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:09,311 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:09,311 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:09,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:09,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:09,312 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:09,312 INFO L423 AbstractCegarLoop]: === Iteration 205 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:09,312 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:09,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1007047421, now seen corresponding path program 191 times [2018-09-30 11:00:09,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:09,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:09,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:09,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:09,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:09,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:09,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:09,372 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:09,379 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 11:00:09,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:09,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:09,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:09,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:09,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:09,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:09,443 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:09,443 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:09,917 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:00:09,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:09,917 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:09,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:09,918 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:00:09,918 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:00:09,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:09,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:00:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 11:00:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:10,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:10,097 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:10,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:10,097 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:10,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:10,097 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:10,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:10,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:10,098 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:10,098 INFO L423 AbstractCegarLoop]: === Iteration 206 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:10,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:10,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1008892541, now seen corresponding path program 192 times [2018-09-30 11:00:10,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:10,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:10,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:10,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:10,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:10,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:10,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:10,156 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:10,165 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 11:00:10,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:10,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:10,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:10,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:10,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:10,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:10,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:10,221 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:10,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:10,686 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:00:10,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:10,686 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:10,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:10,686 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:00:10,686 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:00:10,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:10,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:00:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 11:00:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:10,860 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:10,860 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:10,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:10,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:10,860 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:10,861 INFO L423 AbstractCegarLoop]: === Iteration 207 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:10,861 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:10,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1008894463, now seen corresponding path program 193 times [2018-09-30 11:00:10,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:10,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:10,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:10,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:10,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:10,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:10,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:10,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:10,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:10,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:10,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:10,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:10,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:10,986 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:10,986 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:11,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:11,419 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 11:00:11,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:11,419 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:11,420 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:00:11,420 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 11:00:11,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 11:00:11,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-30 11:00:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 11:00:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 11:00:11,546 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 11:00:11,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:11,547 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 11:00:11,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:11,547 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 11:00:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:11,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:11,547 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:11,547 INFO L423 AbstractCegarLoop]: === Iteration 208 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:11,547 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:11,547 INFO L82 PathProgramCache]: Analyzing trace with hash -746955655, now seen corresponding path program 194 times [2018-09-30 11:00:11,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:11,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:11,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:11,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:11,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:11,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:11,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:11,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:11,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:11,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:11,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:11,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:11,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:11,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:11,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:11,682 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:11,682 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 11:00:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:12,258 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 11:00:12,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:12,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:12,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:12,258 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:00:12,258 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:00:12,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:12,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:00:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 11:00:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:12,438 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:12,438 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:12,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:12,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:12,438 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:12,438 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:12,438 INFO L423 AbstractCegarLoop]: === Iteration 209 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:12,439 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:12,439 INFO L82 PathProgramCache]: Analyzing trace with hash -746953733, now seen corresponding path program 195 times [2018-09-30 11:00:12,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:12,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:12,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:12,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:12,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:12,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:12,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:12,498 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:12,506 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 11:00:12,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:12,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:12,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:12,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:12,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:12,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:12,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:12,566 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:13,119 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 11:00:13,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:13,120 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:13,120 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:00:13,120 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:00:13,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:13,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:00:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 11:00:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:13,301 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:13,302 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:13,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:13,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:13,302 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:13,302 INFO L423 AbstractCegarLoop]: === Iteration 210 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:13,302 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:13,302 INFO L82 PathProgramCache]: Analyzing trace with hash -745108613, now seen corresponding path program 196 times [2018-09-30 11:00:13,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:13,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:13,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:13,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:13,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:13,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:13,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:13,356 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:13,362 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:13,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:13,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:13,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:13,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:13,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:13,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:13,422 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:13,422 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:13,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:13,955 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:00:13,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:13,955 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:13,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:13,956 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:00:13,956 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:00:13,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:00:14,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 11:00:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:14,138 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:14,138 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:14,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:14,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:14,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:14,139 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:14,139 INFO L423 AbstractCegarLoop]: === Iteration 211 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:14,139 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:14,139 INFO L82 PathProgramCache]: Analyzing trace with hash -745106691, now seen corresponding path program 197 times [2018-09-30 11:00:14,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:14,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:14,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:14,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:14,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:14,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:14,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:14,193 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:14,202 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 11:00:14,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:14,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:14,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:14,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:14,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:14,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:14,259 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:14,259 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:14,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:14,772 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:00:14,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:14,772 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:14,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:14,773 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:00:14,773 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:00:14,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:00:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-30 11:00:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:00:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 11:00:14,940 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 11:00:14,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:14,940 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 11:00:14,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:14,940 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 11:00:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:14,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:14,940 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:14,940 INFO L423 AbstractCegarLoop]: === Iteration 212 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:14,941 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:14,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1028051707, now seen corresponding path program 198 times [2018-09-30 11:00:14,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:14,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:14,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:14,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:14,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:14,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:14,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:14,994 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:15,002 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 11:00:15,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:15,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:15,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:15,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:15,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:15,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:15,062 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:15,062 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 11:00:15,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:15,604 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 11:00:15,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:15,605 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:15,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:15,605 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:00:15,605 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:00:15,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:15,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:00:15,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 11:00:15,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:15,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:15,791 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:15,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:15,791 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:15,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:15,792 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:15,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:15,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:15,792 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:15,792 INFO L423 AbstractCegarLoop]: === Iteration 213 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:15,792 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:15,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1028053629, now seen corresponding path program 199 times [2018-09-30 11:00:15,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:15,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:15,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:15,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:15,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:15,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:15,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:15,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:15,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:15,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:15,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:15,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:15,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:15,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:15,911 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:16,477 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 11:00:16,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:16,477 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:16,478 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:00:16,478 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:00:16,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:16,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:00:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 11:00:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:16,656 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:16,656 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:16,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:16,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:16,656 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:16,657 INFO L423 AbstractCegarLoop]: === Iteration 214 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:16,657 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:16,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1029898749, now seen corresponding path program 200 times [2018-09-30 11:00:16,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:16,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:16,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:16,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:16,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:16,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:16,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:16,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:16,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:16,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:16,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:16,803 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:16,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:16,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:16,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:16,804 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:16,804 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:17,362 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:00:17,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:17,362 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:17,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:17,362 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:00:17,362 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:00:17,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:17,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:00:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 11:00:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:17,558 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:17,558 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:17,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:17,558 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:17,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:17,558 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:17,559 INFO L423 AbstractCegarLoop]: === Iteration 215 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:17,559 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:17,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1029900671, now seen corresponding path program 201 times [2018-09-30 11:00:17,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:17,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:17,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:17,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:17,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:17,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:17,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:17,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:17,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 11:00:17,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:17,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:17,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:17,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:17,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:17,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:17,692 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:17,692 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:18,201 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:00:18,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:18,201 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:18,202 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:00:18,202 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:00:18,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:18,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:00:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-30 11:00:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 11:00:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 11:00:18,356 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 11:00:18,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:18,356 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 11:00:18,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 11:00:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:18,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:18,356 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:18,356 INFO L423 AbstractCegarLoop]: === Iteration 216 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:18,356 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:18,357 INFO L82 PathProgramCache]: Analyzing trace with hash -66897285, now seen corresponding path program 202 times [2018-09-30 11:00:18,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:18,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:18,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:18,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:18,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:18,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:18,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:18,417 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:18,423 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:18,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:18,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:18,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:18,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:18,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:18,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:18,483 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:18,483 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 11:00:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:19,003 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:00:19,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:19,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:19,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:19,004 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:00:19,004 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:00:19,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:19,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:00:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 11:00:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:19,195 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:19,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:19,195 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:19,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:19,195 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:19,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:19,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:19,195 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:19,195 INFO L423 AbstractCegarLoop]: === Iteration 217 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:19,195 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:19,195 INFO L82 PathProgramCache]: Analyzing trace with hash -66895363, now seen corresponding path program 203 times [2018-09-30 11:00:19,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:19,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:19,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:19,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:19,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:19,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:19,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:19,251 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:19,259 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 11:00:19,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:19,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:19,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:19,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:19,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:19,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:19,321 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:19,321 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:19,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:19,837 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:00:19,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:19,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:19,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:19,838 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:00:19,838 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:00:19,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:19,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:00:20,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 11:00:20,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:20,027 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:20,027 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:20,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:20,028 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:20,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:20,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:20,028 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:20,028 INFO L423 AbstractCegarLoop]: === Iteration 218 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:20,028 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:20,028 INFO L82 PathProgramCache]: Analyzing trace with hash -65050243, now seen corresponding path program 204 times [2018-09-30 11:00:20,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:20,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:20,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:20,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:20,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:20,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:20,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:20,292 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:20,300 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 11:00:20,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:20,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:20,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:20,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:20,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:20,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:20,342 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:20,342 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:20,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:20,862 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:00:20,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:20,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:20,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:20,863 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:00:20,863 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:00:20,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:20,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:00:21,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 11:00:21,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:21,057 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:21,057 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:21,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:21,058 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:21,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:21,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:21,058 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:21,058 INFO L423 AbstractCegarLoop]: === Iteration 219 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:21,058 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash -65048321, now seen corresponding path program 205 times [2018-09-30 11:00:21,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:21,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:21,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:21,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:21,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:21,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:21,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:21,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:21,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:21,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:21,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:21,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:21,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:21,181 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:21,182 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:21,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:21,703 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:00:21,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:21,704 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:21,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:21,704 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:00:21,704 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:00:21,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:00:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-30 11:00:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:00:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 11:00:21,886 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 11:00:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:21,886 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 11:00:21,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 11:00:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:21,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:21,886 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:21,887 INFO L423 AbstractCegarLoop]: === Iteration 220 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:21,887 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:21,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1708110077, now seen corresponding path program 206 times [2018-09-30 11:00:21,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:21,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:21,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:21,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:21,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:21,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:21,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:21,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:21,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:21,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:21,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:22,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:22,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:22,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:22,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:22,044 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:22,044 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 11:00:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:22,537 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:00:22,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:22,537 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:22,538 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:00:22,538 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:00:22,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:00:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 11:00:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:22,742 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:22,743 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:22,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:22,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:22,743 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:22,743 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:22,743 INFO L423 AbstractCegarLoop]: === Iteration 221 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:22,743 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:22,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1708111999, now seen corresponding path program 207 times [2018-09-30 11:00:22,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:22,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:22,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:22,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:22,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:22,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:22,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:22,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:22,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 11:00:22,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:22,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:22,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:22,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:22,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:22,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:22,891 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:22,891 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:23,385 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:00:23,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:23,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:23,386 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:00:23,386 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:00:23,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:23,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:00:23,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 11:00:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:23,581 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:23,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:23,581 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:23,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:23,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:23,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:23,582 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:23,582 INFO L423 AbstractCegarLoop]: === Iteration 222 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:23,582 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:23,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1709957119, now seen corresponding path program 208 times [2018-09-30 11:00:23,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:23,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:23,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:23,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:23,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:23,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:23,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:23,640 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:23,646 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:23,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:23,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:23,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:23,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:23,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:23,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:23,739 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:23,739 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:24,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:24,214 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:00:24,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:24,215 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:24,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:24,215 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:00:24,215 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:00:24,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:24,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:00:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 11:00:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:24,399 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:24,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:24,400 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:24,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:24,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:24,400 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 11:00:24,400 INFO L423 AbstractCegarLoop]: === Iteration 223 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:24,400 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:24,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1709959041, now seen corresponding path program 209 times [2018-09-30 11:00:24,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:24,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:24,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:24,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:24,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:24,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:24,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:24,459 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:24,469 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 11:00:24,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:24,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:24,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:24,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:24,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:24,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:24,535 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:24,535 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:24,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:24,976 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 11:00:24,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:24,976 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:24,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:24,977 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:00:24,977 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 11:00:24,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:24,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 11:00:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2018-09-30 11:00:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 11:00:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 11:00:25,098 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-30 11:00:25,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:25,099 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 11:00:25,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 11:00:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:25,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:25,099 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:25,099 INFO L423 AbstractCegarLoop]: === Iteration 224 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:25,099 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:25,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2034826247, now seen corresponding path program 210 times [2018-09-30 11:00:25,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:25,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:25,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:25,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:25,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:25,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:25,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:25,154 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:25,161 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 11:00:25,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:25,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:25,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:25,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:25,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:25,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:25,216 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:25,216 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-30 11:00:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:25,734 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:00:25,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:25,735 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:25,735 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:00:25,735 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:00:25,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:00:25,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 11:00:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:25,954 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:25,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:25,954 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:25,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:25,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:25,954 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:25,954 INFO L423 AbstractCegarLoop]: === Iteration 225 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:25,955 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:25,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2034824325, now seen corresponding path program 211 times [2018-09-30 11:00:25,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:25,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:25,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:25,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:25,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:26,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:26,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:26,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:26,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:26,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:26,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:26,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:26,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:26,070 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:26,070 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:26,608 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:00:26,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:26,608 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:26,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:26,609 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:00:26,609 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:00:26,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:26,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:00:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 11:00:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:26,826 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:26,826 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:26,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:26,826 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:26,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:26,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:26,826 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:26,826 INFO L423 AbstractCegarLoop]: === Iteration 226 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:26,826 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:26,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2032979205, now seen corresponding path program 212 times [2018-09-30 11:00:26,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:26,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:26,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:26,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:26,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:26,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:26,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:26,884 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:26,892 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:26,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:26,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:26,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:26,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:26,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:26,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:26,947 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:26,947 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:27,494 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:00:27,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:27,494 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:27,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:27,495 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:00:27,495 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:00:27,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:27,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:00:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 11:00:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:27,699 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:27,700 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:27,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:27,700 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:27,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:27,700 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:27,700 INFO L423 AbstractCegarLoop]: === Iteration 227 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:27,700 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash -2032977283, now seen corresponding path program 213 times [2018-09-30 11:00:27,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:27,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:27,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:27,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:27,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:27,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:27,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:27,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:27,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 11:00:27,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:27,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:27,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:27,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:27,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:27,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:27,841 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:27,841 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:28,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:28,362 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:00:28,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:28,363 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:28,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:28,364 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:00:28,364 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:00:28,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:28,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:00:28,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-30 11:00:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:00:28,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 11:00:28,567 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 11:00:28,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:28,568 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 11:00:28,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 11:00:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:28,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:28,568 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:28,568 INFO L423 AbstractCegarLoop]: === Iteration 228 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:28,568 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:28,568 INFO L82 PathProgramCache]: Analyzing trace with hash -259818885, now seen corresponding path program 214 times [2018-09-30 11:00:28,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:28,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:28,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:28,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:28,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:28,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:28,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:28,738 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:28,766 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:28,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:28,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:29,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:29,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:29,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:29,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:29,116 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:29,116 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 11:00:29,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:29,623 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:00:29,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:29,623 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:29,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:29,624 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:00:29,624 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:00:29,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:00:29,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 11:00:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:29,844 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:29,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:29,844 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:29,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:29,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:29,845 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:29,845 INFO L423 AbstractCegarLoop]: === Iteration 229 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:29,845 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:29,845 INFO L82 PathProgramCache]: Analyzing trace with hash -259816963, now seen corresponding path program 215 times [2018-09-30 11:00:29,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:29,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:29,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:29,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:29,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:29,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:29,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:29,905 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:29,913 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 11:00:29,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:29,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:29,971 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:29,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:29,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:29,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:29,972 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:29,972 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:30,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:30,478 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:00:30,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:30,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:30,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:30,479 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:00:30,479 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:00:30,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:00:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-30 11:00:30,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:30,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:30,682 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:30,682 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:30,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:30,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:30,683 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:30,683 INFO L423 AbstractCegarLoop]: === Iteration 230 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:30,683 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:30,683 INFO L82 PathProgramCache]: Analyzing trace with hash -257971843, now seen corresponding path program 216 times [2018-09-30 11:00:30,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:30,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:30,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:30,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:30,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:30,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:30,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:30,745 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:30,753 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 11:00:30,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:30,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:30,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:30,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:30,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:30,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:30,819 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:30,819 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:31,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:31,320 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 11:00:31,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:31,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:31,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:31,321 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:00:31,321 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 11:00:31,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 11:00:31,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 11:00:31,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:31,537 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:31,537 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:31,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:31,537 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:31,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:31,537 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:31,537 INFO L423 AbstractCegarLoop]: === Iteration 231 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:31,537 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:31,537 INFO L82 PathProgramCache]: Analyzing trace with hash -257969921, now seen corresponding path program 217 times [2018-09-30 11:00:31,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:31,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:31,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:31,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:31,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:31,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:31,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:31,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:31,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:31,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:31,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:31,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:31,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:31,660 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:31,660 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:32,140 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 11:00:32,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:32,140 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:32,140 INFO L225 Difference]: With dead ends: 45 [2018-09-30 11:00:32,140 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 11:00:32,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:32,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 11:00:32,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-30 11:00:32,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 11:00:32,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 11:00:32,325 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 11:00:32,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:32,325 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 11:00:32,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:32,325 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 11:00:32,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:32,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:32,326 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:32,326 INFO L423 AbstractCegarLoop]: === Iteration 232 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:32,326 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:32,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1354767877, now seen corresponding path program 218 times [2018-09-30 11:00:32,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:32,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:32,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:32,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:32,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:32,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:32,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:32,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:32,422 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:32,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:32,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:32,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:32,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:32,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:32,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:32,493 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:32,493 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 11:00:33,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:33,100 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:00:33,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:33,100 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:33,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:33,101 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:00:33,101 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:00:33,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:33,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:00:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 11:00:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:33,330 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:33,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:33,331 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:33,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:33,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:33,331 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:33,331 INFO L423 AbstractCegarLoop]: === Iteration 233 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:33,332 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:33,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1354765955, now seen corresponding path program 219 times [2018-09-30 11:00:33,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:33,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:33,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:33,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:33,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:33,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:33,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:33,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:33,396 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 11:00:33,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:33,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:33,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:33,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:33,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:33,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:33,910 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:33,910 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:34,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:34,999 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:00:34,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:34,999 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:35,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:35,000 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:00:35,000 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:00:35,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:35,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:00:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 11:00:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:35,201 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:35,201 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:35,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:35,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:35,202 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:35,202 INFO L423 AbstractCegarLoop]: === Iteration 234 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:35,202 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:35,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1352920835, now seen corresponding path program 220 times [2018-09-30 11:00:35,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:35,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:35,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:35,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:35,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:35,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:35,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:35,258 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:35,264 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:35,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:35,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:35,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:35,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:35,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:35,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:35,321 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:35,321 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:35,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:35,872 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:00:35,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:35,873 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:35,873 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:00:35,873 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:00:35,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:35,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:00:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 11:00:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:36,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:36,081 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:36,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:36,081 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:36,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:36,081 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:36,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:36,082 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:36,082 INFO L423 AbstractCegarLoop]: === Iteration 235 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:36,082 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:36,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1352918913, now seen corresponding path program 221 times [2018-09-30 11:00:36,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:36,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:36,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:36,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:36,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:36,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:36,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:36,142 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:36,151 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 11:00:36,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:36,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:36,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:36,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:36,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:36,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:36,218 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:36,219 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:36,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:36,765 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:00:36,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:36,766 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:36,766 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:00:36,766 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:00:36,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:00:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-30 11:00:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:00:36,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 11:00:36,972 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 11:00:36,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:36,972 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 11:00:36,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:36,972 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 11:00:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:36,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:36,973 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:36,973 INFO L423 AbstractCegarLoop]: === Iteration 236 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:36,973 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:36,973 INFO L82 PathProgramCache]: Analyzing trace with hash 420239485, now seen corresponding path program 222 times [2018-09-30 11:00:36,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:36,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:36,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:36,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:36,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:37,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:37,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:37,033 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:37,041 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 11:00:37,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:37,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:37,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:37,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:37,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:37,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:37,095 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:37,095 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 11:00:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:37,611 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:00:37,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:37,611 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:37,612 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:00:37,612 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:00:37,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:37,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:00:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 11:00:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:37,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:37,820 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:37,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:37,820 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:37,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:37,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:37,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:37,821 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:37,821 INFO L423 AbstractCegarLoop]: === Iteration 237 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:37,821 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:37,821 INFO L82 PathProgramCache]: Analyzing trace with hash 420241407, now seen corresponding path program 223 times [2018-09-30 11:00:37,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:37,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:37,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:37,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:37,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:38,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:38,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:38,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:38,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:38,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:38,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:38,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:38,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:38,293 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:38,293 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:38,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:38,809 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:00:38,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:38,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:38,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:38,810 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:00:38,810 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:00:38,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:38,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:00:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-30 11:00:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:39,017 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:39,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:39,017 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:39,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:39,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:39,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:39,017 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:39,018 INFO L423 AbstractCegarLoop]: === Iteration 238 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:39,018 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:39,018 INFO L82 PathProgramCache]: Analyzing trace with hash 422086527, now seen corresponding path program 224 times [2018-09-30 11:00:39,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:39,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:39,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:39,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:39,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:39,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:39,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:39,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:39,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:39,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:39,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:39,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:39,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:39,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:39,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:39,136 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:39,136 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:39,638 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 11:00:39,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:39,638 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:39,638 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:00:39,639 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 11:00:39,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 11:00:39,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 11:00:39,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:39,859 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:39,860 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:39,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:39,860 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:39,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:39,860 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 11:00:39,860 INFO L423 AbstractCegarLoop]: === Iteration 239 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:39,860 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:39,860 INFO L82 PathProgramCache]: Analyzing trace with hash 422088449, now seen corresponding path program 225 times [2018-09-30 11:00:39,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:39,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:39,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:39,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:39,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:39,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:39,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:39,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:39,926 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 11:00:39,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:39,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:39,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:39,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:39,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:39,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:39,984 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:39,984 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:40,461 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 11:00:40,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:40,462 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:40,462 INFO L225 Difference]: With dead ends: 45 [2018-09-30 11:00:40,462 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 11:00:40,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:40,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 11:00:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2018-09-30 11:00:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 11:00:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 11:00:40,627 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 11:00:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:40,627 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 11:00:40,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:40,627 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 11:00:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:40,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:40,627 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:40,627 INFO L423 AbstractCegarLoop]: === Iteration 240 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:40,628 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:40,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1333761669, now seen corresponding path program 226 times [2018-09-30 11:00:40,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:40,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:40,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:40,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:40,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:40,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:40,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:40,685 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:40,691 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:40,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:40,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:40,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:40,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:40,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:40,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:40,742 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:40,742 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 11:00:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:41,247 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 11:00:41,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:41,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:41,248 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:00:41,248 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 11:00:41,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:41,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 11:00:41,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 11:00:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:41,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:41,474 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:41,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:41,475 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:41,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:41,475 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:41,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:41,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:41,475 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:41,475 INFO L423 AbstractCegarLoop]: === Iteration 241 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:41,475 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:41,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1333759747, now seen corresponding path program 227 times [2018-09-30 11:00:41,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:41,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:41,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:41,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:41,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:41,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:41,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:41,534 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:41,543 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 11:00:41,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:41,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:41,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:41,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:41,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:41,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:41,599 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:41,599 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:42,136 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 11:00:42,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:42,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:42,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:42,137 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:00:42,137 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 11:00:42,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:42,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 11:00:42,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 11:00:42,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:42,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:42,367 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:42,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:42,367 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:42,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:42,367 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:42,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:42,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:42,367 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:42,368 INFO L423 AbstractCegarLoop]: === Iteration 242 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:42,368 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:42,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1331914627, now seen corresponding path program 228 times [2018-09-30 11:00:42,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:42,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:42,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:42,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:42,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:42,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:42,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:42,441 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:42,450 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 11:00:42,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:42,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:42,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:42,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:42,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:42,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:42,520 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:42,520 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:43,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:43,027 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 11:00:43,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:43,027 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:43,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:43,028 INFO L225 Difference]: With dead ends: 45 [2018-09-30 11:00:43,028 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 11:00:43,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 11:00:43,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-30 11:00:43,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:43,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:43,262 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:43,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:43,263 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:43,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:43,263 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:43,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:43,263 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:43,263 INFO L423 AbstractCegarLoop]: === Iteration 243 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:43,263 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:43,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1331912705, now seen corresponding path program 229 times [2018-09-30 11:00:43,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:43,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:43,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:43,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:43,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:43,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:43,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:43,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:43,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:43,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:43,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:43,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:43,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:43,376 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:43,376 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:43,906 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 11:00:43,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:43,906 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:43,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:43,907 INFO L225 Difference]: With dead ends: 43 [2018-09-30 11:00:43,907 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 11:00:43,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 11:00:44,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 11:00:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:00:44,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 11:00:44,127 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 11:00:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:44,127 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 11:00:44,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:44,127 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 11:00:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:44,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:44,127 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:44,128 INFO L423 AbstractCegarLoop]: === Iteration 244 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:44,128 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:44,128 INFO L82 PathProgramCache]: Analyzing trace with hash 441245693, now seen corresponding path program 230 times [2018-09-30 11:00:44,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:44,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:44,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:44,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:44,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:44,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:44,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:44,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:44,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:44,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:44,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:44,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:44,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:44,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:44,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:44,259 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:44,259 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 11:00:44,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:44,759 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 11:00:44,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:44,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:44,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:44,760 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:00:44,760 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 11:00:44,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:44,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 11:00:44,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 11:00:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:44,985 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:44,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:44,985 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:44,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:44,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:44,985 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:44,985 INFO L423 AbstractCegarLoop]: === Iteration 245 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:44,986 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:44,986 INFO L82 PathProgramCache]: Analyzing trace with hash 441247615, now seen corresponding path program 231 times [2018-09-30 11:00:44,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:44,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:44,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:44,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:44,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:45,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:45,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:45,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:45,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 11:00:45,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:45,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:45,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:45,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:45,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:45,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:45,266 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:45,266 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:45,784 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 11:00:45,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:45,784 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:45,785 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:00:45,785 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 11:00:45,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:45,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 11:00:46,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 11:00:46,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:46,000 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:46,001 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:46,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:46,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:46,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:46,001 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:46,001 INFO L423 AbstractCegarLoop]: === Iteration 246 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:46,001 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:46,001 INFO L82 PathProgramCache]: Analyzing trace with hash 443092735, now seen corresponding path program 232 times [2018-09-30 11:00:46,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:46,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:46,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:46,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:46,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:46,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:46,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:46,060 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:46,067 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:46,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:46,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:46,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:46,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:46,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:46,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:46,126 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:46,126 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:46,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:46,625 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 11:00:46,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:46,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:46,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:46,625 INFO L225 Difference]: With dead ends: 45 [2018-09-30 11:00:46,625 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 11:00:46,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:46,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 11:00:46,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-30 11:00:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:46,870 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:46,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:46,870 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:46,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:46,870 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:46,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:46,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:46,871 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 11:00:46,871 INFO L423 AbstractCegarLoop]: === Iteration 247 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:46,871 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:46,871 INFO L82 PathProgramCache]: Analyzing trace with hash 443094657, now seen corresponding path program 233 times [2018-09-30 11:00:46,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:46,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:46,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:46,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:46,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:46,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:46,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:46,931 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:46,938 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 11:00:46,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:46,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:46,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:46,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:46,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:46,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:46,993 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:46,993 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:47,461 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 11:00:47,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:47,462 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:47,462 INFO L225 Difference]: With dead ends: 43 [2018-09-30 11:00:47,462 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 11:00:47,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 11:00:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-30 11:00:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 11:00:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 11:00:47,648 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 11:00:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:47,648 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 11:00:47,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 11:00:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:47,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:47,649 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 11:00:47,649 INFO L423 AbstractCegarLoop]: === Iteration 248 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:47,649 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash -653703299, now seen corresponding path program 234 times [2018-09-30 11:00:47,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:47,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:47,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:47,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:47,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:47,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:47,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:47,777 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:47,791 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 11:00:47,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:47,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:47,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:47,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:47,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:47,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:47,862 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:47,862 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 11:00:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:48,349 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 11:00:48,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:48,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:48,349 INFO L225 Difference]: With dead ends: 43 [2018-09-30 11:00:48,350 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 11:00:48,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 11:00:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-30 11:00:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:48,576 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:48,576 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:48,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:48,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:48,576 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:48,577 INFO L423 AbstractCegarLoop]: === Iteration 249 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:48,577 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:48,577 INFO L82 PathProgramCache]: Analyzing trace with hash -653701377, now seen corresponding path program 235 times [2018-09-30 11:00:48,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:48,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:48,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:48,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:48,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:48,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:48,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:48,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:48,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:48,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:48,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:48,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:48,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:48,702 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:48,703 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:49,161 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 11:00:49,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:49,161 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:49,162 INFO L225 Difference]: With dead ends: 41 [2018-09-30 11:00:49,162 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 11:00:49,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:49,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 11:00:49,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 11:00:49,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:49,397 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:49,397 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:49,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:49,397 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:49,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:49,398 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:49,398 INFO L423 AbstractCegarLoop]: === Iteration 250 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:49,398 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:49,398 INFO L82 PathProgramCache]: Analyzing trace with hash -651856257, now seen corresponding path program 236 times [2018-09-30 11:00:49,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:49,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:49,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:49,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:49,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:49,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:49,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:49,463 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:49,469 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:49,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:49,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:49,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:49,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:49,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:49,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:49,534 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:49,534 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:50,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:50,012 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 11:00:50,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:50,012 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:50,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:50,012 INFO L225 Difference]: With dead ends: 43 [2018-09-30 11:00:50,012 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 11:00:50,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:50,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 11:00:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-30 11:00:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:50,248 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:50,248 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:50,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:50,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:50,248 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 11:00:50,248 INFO L423 AbstractCegarLoop]: === Iteration 251 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:50,248 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:50,249 INFO L82 PathProgramCache]: Analyzing trace with hash -651854335, now seen corresponding path program 237 times [2018-09-30 11:00:50,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:50,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:50,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:50,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:50,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:50,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:50,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:50,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:50,315 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 11:00:50,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:50,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:50,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:50,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:50,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:50,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:50,380 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:50,380 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:50,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:50,828 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 11:00:50,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:50,828 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:50,828 INFO L225 Difference]: With dead ends: 41 [2018-09-30 11:00:50,829 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 11:00:50,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 11:00:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 11:00:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:00:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 11:00:51,037 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 11:00:51,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:51,037 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 11:00:51,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:51,037 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 11:00:51,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:51,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:51,038 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 11:00:51,038 INFO L423 AbstractCegarLoop]: === Iteration 252 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:51,038 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:51,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1121304063, now seen corresponding path program 238 times [2018-09-30 11:00:51,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:51,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:51,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:51,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:51,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:51,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:51,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:51,100 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:51,105 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:51,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:51,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:51,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:51,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:51,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:51,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:51,161 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:51,161 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 11:00:51,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:51,604 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 11:00:51,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:51,605 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:51,605 INFO L225 Difference]: With dead ends: 39 [2018-09-30 11:00:51,605 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 11:00:51,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 11:00:51,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-09-30 11:00:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:51,843 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:51,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:51,843 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:51,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:51,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:51,844 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 11:00:51,844 INFO L423 AbstractCegarLoop]: === Iteration 253 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:51,844 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:51,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1121305985, now seen corresponding path program 239 times [2018-09-30 11:00:51,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:51,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:51,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:51,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:51,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:51,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:51,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:51,904 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:00:51,913 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 11:00:51,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:51,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:51,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:51,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:51,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:51,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:51,968 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:51,968 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:52,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:52,405 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 11:00:52,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:52,405 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:52,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:52,406 INFO L225 Difference]: With dead ends: 39 [2018-09-30 11:00:52,406 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 11:00:52,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 11:00:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-09-30 11:00:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:52,643 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 11:00:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:52,643 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:52,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:52,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:52,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:52,644 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 11:00:52,644 INFO L423 AbstractCegarLoop]: === Iteration 254 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:52,644 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:52,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1123151105, now seen corresponding path program 240 times [2018-09-30 11:00:52,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:52,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:52,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:52,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:52,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:52,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:52,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:52,711 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:00:52,722 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 11:00:52,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:52,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:52,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:52,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:52,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:52,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:52,793 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:52,794 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 11:00:53,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:53,226 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 11:00:53,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:53,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:53,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:53,227 INFO L225 Difference]: With dead ends: 37 [2018-09-30 11:00:53,227 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 11:00:53,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:53,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 11:00:53,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-09-30 11:00:53,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:53,455 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 11:00:53,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:53,455 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:53,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:53,455 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 11:00:53,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:53,456 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-30 11:00:53,456 INFO L423 AbstractCegarLoop]: === Iteration 255 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:53,456 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:53,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1123153027, now seen corresponding path program 7 times [2018-09-30 11:00:53,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:53,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:53,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:53,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:53,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:53,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:53,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:53,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:53,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:53,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:53,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 11:00:53,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 11:00:53,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 11:00:53,929 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:53,929 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 11:00:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:54,305 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2018-09-30 11:00:54,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 11:00:54,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 11:00:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:54,306 INFO L225 Difference]: With dead ends: 36 [2018-09-30 11:00:54,306 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 11:00:54,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:54,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 11:00:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2018-09-30 11:00:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 11:00:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 11:00:54,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-30 11:00:54,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:54,452 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 11:00:54,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 11:00:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 11:00:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:00:54,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:54,453 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-09-30 11:00:54,453 INFO L423 AbstractCegarLoop]: === Iteration 256 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:54,453 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:54,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1610002744, now seen corresponding path program 8 times [2018-09-30 11:00:54,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:54,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:54,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:54,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:54,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:54,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:54,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:54,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:54,531 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:54,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:54,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:54,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:54,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:00:54,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:00:54,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:00:54,591 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:54,591 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 11 states. [2018-09-30 11:00:55,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:55,284 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:00:55,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:00:55,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:00:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:55,287 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:00:55,287 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:00:55,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:00:55,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 11:00:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:00:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:00:55,565 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:00:55,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:55,566 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:00:55,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:00:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:00:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:00:55,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:55,567 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 11:00:55,567 INFO L423 AbstractCegarLoop]: === Iteration 257 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:55,567 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:55,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004666, now seen corresponding path program 241 times [2018-09-30 11:00:55,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:55,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:55,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:55,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:55,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:55,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:55,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:55,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:55,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:55,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:55,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:00:55,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:00:55,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:00:55,706 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:55,706 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:00:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:56,445 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:00:56,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:00:56,445 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:00:56,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:56,446 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:00:56,446 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:00:56,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:00:56,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 11:00:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:00:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:00:56,714 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:00:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:56,715 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:00:56,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:00:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:00:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:00:56,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:56,715 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 11:00:56,715 INFO L423 AbstractCegarLoop]: === Iteration 258 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:56,715 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:56,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1611849786, now seen corresponding path program 242 times [2018-09-30 11:00:56,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:56,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:56,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:56,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:00:56,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:56,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:56,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:56,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:00:56,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:00:56,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:56,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:56,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:56,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:00:56,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:00:56,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:00:56,839 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:56,839 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:00:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:57,565 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 11:00:57,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:00:57,565 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:00:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:57,566 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:00:57,566 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:00:57,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:57,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:00:57,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 11:00:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:00:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:00:57,852 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:00:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:57,852 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:00:57,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:00:57,853 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:00:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:00:57,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:57,853 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:00:57,853 INFO L423 AbstractCegarLoop]: === Iteration 259 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:57,853 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:57,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1611851708, now seen corresponding path program 243 times [2018-09-30 11:00:57,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:57,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:57,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:57,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:57,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:57,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:57,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:57,929 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:00:57,943 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:00:57,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:57,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:58,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:58,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:00:58,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:00:58,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:00:58,017 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:58,017 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:00:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:58,746 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:00:58,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:00:58,746 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:00:58,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:58,747 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:00:58,747 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:00:58,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:58,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:00:58,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 11:00:58,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:00:58,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:00:58,999 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 11:00:59,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:00:59,000 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:00:59,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:00:59,000 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:00:59,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:00:59,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:00:59,000 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 11:00:59,000 INFO L423 AbstractCegarLoop]: === Iteration 260 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:00:59,000 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:00:59,000 INFO L82 PathProgramCache]: Analyzing trace with hash -909957190, now seen corresponding path program 244 times [2018-09-30 11:00:59,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:00:59,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:00:59,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:59,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:00:59,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:00:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:00:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:59,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:00:59,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:00:59,062 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:00:59,067 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:00:59,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:00:59,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:00:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:00:59,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:00:59,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:00:59,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:00:59,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:00:59,133 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:00:59,134 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 11:00:59,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:00:59,893 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:00:59,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:00:59,893 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:00:59,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:00:59,894 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:00:59,894 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:00:59,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:00:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:01:00,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 11:01:00,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:00,190 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:00,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:00,190 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:00,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:00,191 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:00,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:00,191 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:00,191 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:01:00,191 INFO L423 AbstractCegarLoop]: === Iteration 261 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:00,191 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:00,191 INFO L82 PathProgramCache]: Analyzing trace with hash -909955268, now seen corresponding path program 245 times [2018-09-30 11:01:00,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:00,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:00,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:00,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:00,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:00,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:00,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:00,255 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:00,265 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:01:00,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:00,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:00,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:00,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:00,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:00,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:00,334 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:00,334 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:01,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:01,095 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:01:01,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:01,095 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:01,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:01,096 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:01:01,096 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:01:01,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:01,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:01:01,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 11:01:01,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:01:01,389 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:01:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:01,389 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:01:01,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:01:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:01,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:01,390 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:01:01,390 INFO L423 AbstractCegarLoop]: === Iteration 262 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:01,390 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:01,390 INFO L82 PathProgramCache]: Analyzing trace with hash -908110148, now seen corresponding path program 246 times [2018-09-30 11:01:01,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:01,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:01,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:01,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:01,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:01,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:01,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:01,452 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:01,463 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:01:01,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:01,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:01,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:01,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:01,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:01,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:01,535 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:01,535 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:01:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:02,295 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 11:01:02,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:02,296 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:02,296 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:01:02,296 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:01:02,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:02,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:01:02,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 11:01:02,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:02,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:02,596 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:02,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:02,596 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:02,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:02,596 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:02,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:02,597 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:02,597 INFO L423 AbstractCegarLoop]: === Iteration 263 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:02,597 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:02,597 INFO L82 PathProgramCache]: Analyzing trace with hash -908108226, now seen corresponding path program 247 times [2018-09-30 11:01:02,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:02,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:02,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:02,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:02,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:02,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:02,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:02,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:02,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:02,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:02,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:02,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:02,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:02,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:02,741 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:03,462 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:01:03,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:03,462 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:03,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:03,463 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:01:03,463 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:01:03,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:03,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:01:03,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 11:01:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:01:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 11:01:03,704 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 11:01:03,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:03,704 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 11:01:03,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:03,705 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 11:01:03,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:03,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:03,705 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 11:01:03,705 INFO L423 AbstractCegarLoop]: === Iteration 264 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:03,705 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:03,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2004906182, now seen corresponding path program 248 times [2018-09-30 11:01:03,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:03,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:03,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:03,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:03,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:03,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:03,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:03,768 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:03,774 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:03,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:03,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:03,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:03,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:03,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:03,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:03,832 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:03,832 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 11:01:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:04,550 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:01:04,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:04,550 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:04,551 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:01:04,551 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:01:04,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:01:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 11:01:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:04,850 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:04,851 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:04,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:04,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:04,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:04,851 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:01:04,851 INFO L423 AbstractCegarLoop]: === Iteration 265 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:04,851 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:04,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2004904260, now seen corresponding path program 249 times [2018-09-30 11:01:04,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:04,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:04,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:04,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:04,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:04,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:04,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:04,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:04,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:01:04,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:04,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:05,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:05,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:05,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:05,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:05,035 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:05,035 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:05,742 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:01:05,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:05,743 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:05,743 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:01:05,744 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:01:05,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:01:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 11:01:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:01:06,027 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:01:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:06,027 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:01:06,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:01:06,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:06,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:06,028 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:01:06,028 INFO L423 AbstractCegarLoop]: === Iteration 266 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:06,028 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:06,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2003059140, now seen corresponding path program 250 times [2018-09-30 11:01:06,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:06,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:06,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:06,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:06,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:06,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:06,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:06,085 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:06,093 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:06,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:06,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:06,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:06,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:06,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:06,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:06,178 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:06,178 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:01:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:06,906 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:01:06,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:06,907 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:06,907 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:01:06,907 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:01:06,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:01:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 11:01:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:07,207 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:07,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:07,208 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:07,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:07,208 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:07,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:07,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:07,208 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:07,208 INFO L423 AbstractCegarLoop]: === Iteration 267 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:07,208 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:07,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2003057218, now seen corresponding path program 251 times [2018-09-30 11:01:07,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:07,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:07,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:07,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:07,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:07,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:07,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:07,297 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:07,307 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:01:07,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:07,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:07,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:07,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:07,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:07,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:07,368 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:07,368 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:08,085 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:01:08,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:08,085 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:08,085 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:01:08,085 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:01:08,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:08,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:01:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-30 11:01:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:01:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:01:08,368 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 11:01:08,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:08,368 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:01:08,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:08,368 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:01:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:08,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:08,369 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:01:08,369 INFO L423 AbstractCegarLoop]: === Iteration 268 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:08,369 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:08,369 INFO L82 PathProgramCache]: Analyzing trace with hash -229898820, now seen corresponding path program 252 times [2018-09-30 11:01:08,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:08,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:08,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:08,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:08,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:08,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:08,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:08,438 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:08,451 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:01:08,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:08,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:08,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:08,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:08,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:08,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:08,498 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:08,498 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 11:01:09,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:09,172 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:01:09,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:09,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:09,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:09,173 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:01:09,173 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:01:09,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:01:09,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-30 11:01:09,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:09,456 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:09,456 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:09,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:09,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:09,456 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:09,457 INFO L423 AbstractCegarLoop]: === Iteration 269 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:09,457 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:09,457 INFO L82 PathProgramCache]: Analyzing trace with hash -229896898, now seen corresponding path program 253 times [2018-09-30 11:01:09,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:09,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:09,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:09,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:09,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:09,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:09,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:09,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:09,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:09,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:09,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:09,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:09,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:09,601 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:09,601 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:10,278 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:01:10,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:10,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:10,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:10,279 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:01:10,279 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:01:10,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:01:10,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 11:01:10,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:01:10,577 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:01:10,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:10,577 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:01:10,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:10,577 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:01:10,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:10,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:10,577 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:10,577 INFO L423 AbstractCegarLoop]: === Iteration 270 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:10,578 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:10,578 INFO L82 PathProgramCache]: Analyzing trace with hash -228051778, now seen corresponding path program 254 times [2018-09-30 11:01:10,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:10,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:10,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:10,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:10,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:10,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:10,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:10,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:10,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:10,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:10,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:10,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:10,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:10,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:10,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:10,714 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:10,714 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:01:11,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:11,364 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:01:11,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:11,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:11,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:11,365 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:01:11,365 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:01:11,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:11,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:01:11,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 11:01:11,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:11,648 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:11,648 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:11,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:11,649 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:11,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:11,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:11,649 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:01:11,649 INFO L423 AbstractCegarLoop]: === Iteration 271 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:11,649 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:11,649 INFO L82 PathProgramCache]: Analyzing trace with hash -228049856, now seen corresponding path program 255 times [2018-09-30 11:01:11,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:11,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:11,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:11,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:11,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:11,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:11,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:11,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:11,723 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:01:11,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:11,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:11,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:11,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:11,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:11,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:11,780 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:11,780 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:12,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:12,406 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:01:12,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:12,406 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:12,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:12,407 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:01:12,407 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:01:12,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:12,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:01:12,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 11:01:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 11:01:12,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 11:01:12,703 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-30 11:01:12,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:12,703 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 11:01:12,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 11:01:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:12,703 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:12,703 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 11:01:12,703 INFO L423 AbstractCegarLoop]: === Iteration 272 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:12,703 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:12,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1983899974, now seen corresponding path program 256 times [2018-09-30 11:01:12,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:12,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:12,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:12,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:12,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:12,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:12,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:12,799 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:12,805 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:12,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:12,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:12,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:12,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:12,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:12,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:12,852 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:12,852 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-30 11:01:13,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:13,633 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:01:13,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:13,633 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:13,633 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:01:13,633 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:01:13,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:01:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 11:01:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:13,935 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:13,935 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:13,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:13,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:13,936 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:01:13,936 INFO L423 AbstractCegarLoop]: === Iteration 273 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:13,936 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:13,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1983898052, now seen corresponding path program 257 times [2018-09-30 11:01:13,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:13,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:13,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:13,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:13,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:13,993 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:13,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:14,002 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:14,012 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:01:14,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:14,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:14,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:14,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:14,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:14,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:14,070 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:14,070 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:14,881 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:01:14,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:14,881 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:14,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:14,882 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:01:14,882 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:01:14,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:01:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 11:01:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:15,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:01:15,180 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:01:15,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:15,180 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:01:15,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:15,180 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:01:15,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:15,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:15,181 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:01:15,181 INFO L423 AbstractCegarLoop]: === Iteration 274 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:15,181 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:15,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1982052932, now seen corresponding path program 258 times [2018-09-30 11:01:15,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:15,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:15,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:15,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:15,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:15,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:15,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:15,238 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:15,251 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:01:15,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:15,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:15,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:15,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:15,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:15,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:15,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:15,319 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:01:16,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:16,079 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 11:01:16,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:16,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:16,079 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:01:16,080 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:01:16,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:01:16,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 11:01:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:16,379 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:16,380 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:16,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:16,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:16,380 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:16,380 INFO L423 AbstractCegarLoop]: === Iteration 275 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:16,380 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:16,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1982051010, now seen corresponding path program 259 times [2018-09-30 11:01:16,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:16,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:16,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:16,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:16,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:16,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:16,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:16,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:16,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:16,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:16,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:16,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:16,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:16,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:16,515 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:17,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:17,250 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:01:17,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:17,250 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:17,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:17,251 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:01:17,251 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:01:17,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:17,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:01:17,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 11:01:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:01:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:01:17,536 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 11:01:17,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:17,536 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:01:17,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:01:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:17,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:17,537 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:01:17,537 INFO L423 AbstractCegarLoop]: === Iteration 276 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:17,537 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:17,537 INFO L82 PathProgramCache]: Analyzing trace with hash -208892612, now seen corresponding path program 260 times [2018-09-30 11:01:17,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:17,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:17,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:17,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:17,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:17,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:17,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:17,597 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:17,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:17,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:17,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:17,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:17,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:17,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:17,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:17,660 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:17,660 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 11:01:18,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:18,463 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:01:18,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:18,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:18,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:18,463 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:01:18,463 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:01:18,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:01:18,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 11:01:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:18,766 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:18,767 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:18,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:18,767 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:18,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:18,767 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:18,767 INFO L423 AbstractCegarLoop]: === Iteration 277 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:18,767 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:18,767 INFO L82 PathProgramCache]: Analyzing trace with hash -208890690, now seen corresponding path program 261 times [2018-09-30 11:01:18,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:18,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:18,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:18,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:18,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:18,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:18,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:18,829 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:18,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:01:18,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:18,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:18,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:18,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:18,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:18,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:18,895 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:18,895 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:19,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:19,706 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:01:19,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:19,706 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:19,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:19,707 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:01:19,707 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:01:19,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:01:19,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 11:01:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:01:19,993 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:01:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:19,993 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:01:19,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:01:19,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:19,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:19,994 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:19,994 INFO L423 AbstractCegarLoop]: === Iteration 278 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:19,994 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:19,994 INFO L82 PathProgramCache]: Analyzing trace with hash -207045570, now seen corresponding path program 262 times [2018-09-30 11:01:19,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:19,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:19,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:19,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:19,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:20,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:20,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:20,055 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:20,061 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:20,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:20,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:20,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:20,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:20,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:20,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:20,116 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:20,116 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:01:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:20,881 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 11:01:20,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:20,881 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:20,882 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:01:20,882 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:01:20,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:01:21,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 11:01:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:21,195 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:21,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:21,195 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:21,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:21,196 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:21,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:21,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:21,196 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:01:21,196 INFO L423 AbstractCegarLoop]: === Iteration 279 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:21,196 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:21,196 INFO L82 PathProgramCache]: Analyzing trace with hash -207043648, now seen corresponding path program 263 times [2018-09-30 11:01:21,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:21,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:21,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:21,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:21,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:21,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:21,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:21,256 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:21,266 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:01:21,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:21,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:21,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:21,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:21,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:21,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:21,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:21,322 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:22,080 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:01:22,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:22,080 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:22,081 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:01:22,081 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:01:22,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:01:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 11:01:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:01:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 11:01:22,326 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 11:01:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:22,326 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 11:01:22,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 11:01:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:22,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:22,326 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:01:22,326 INFO L423 AbstractCegarLoop]: === Iteration 280 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:22,326 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:22,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1303841604, now seen corresponding path program 264 times [2018-09-30 11:01:22,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:22,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:22,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:22,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:22,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:22,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:22,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:22,386 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:22,398 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:01:22,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:22,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:22,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:22,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:22,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:22,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:22,465 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:22,465 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 11:01:23,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:23,194 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:01:23,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:23,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:23,194 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:01:23,194 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:01:23,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:23,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:01:23,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 11:01:23,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:23,519 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:23,519 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:23,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:23,519 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:23,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:23,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:23,519 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:23,519 INFO L423 AbstractCegarLoop]: === Iteration 281 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:23,519 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:23,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1303839682, now seen corresponding path program 265 times [2018-09-30 11:01:23,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:23,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:23,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:23,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:23,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:23,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:23,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:23,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:23,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:23,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:23,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:23,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:23,723 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:23,723 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:24,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:24,462 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:01:24,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:24,462 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:24,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:24,463 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:01:24,463 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:01:24,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:24,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:01:24,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 11:01:24,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:24,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:01:24,766 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:01:24,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:24,767 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:01:24,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:24,767 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:01:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:24,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:24,767 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:24,767 INFO L423 AbstractCegarLoop]: === Iteration 282 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:24,767 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:24,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1301994562, now seen corresponding path program 266 times [2018-09-30 11:01:24,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:24,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:24,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:24,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:24,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:24,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:24,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:24,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:24,834 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:24,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:24,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:24,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:24,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:24,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:24,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:24,901 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:24,901 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:01:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:25,646 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:01:25,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:25,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:25,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:25,647 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:01:25,647 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:01:25,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:25,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:01:25,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 11:01:25,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:25,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:25,964 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:25,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:25,965 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:25,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:25,965 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:25,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:25,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:25,965 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:01:25,965 INFO L423 AbstractCegarLoop]: === Iteration 283 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:25,965 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:25,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1301992640, now seen corresponding path program 267 times [2018-09-30 11:01:25,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:25,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:25,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:25,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:25,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:26,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:26,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:26,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:26,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:01:26,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:26,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:26,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:26,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:26,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:26,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:26,306 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:26,306 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:27,019 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:01:27,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:27,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:27,020 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:01:27,020 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:01:27,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:27,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:01:27,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-30 11:01:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:01:27,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:01:27,327 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 11:01:27,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:27,327 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:01:27,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:27,327 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:01:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:27,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:27,327 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:27,327 INFO L423 AbstractCegarLoop]: === Iteration 284 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:27,328 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:27,328 INFO L82 PathProgramCache]: Analyzing trace with hash 471165758, now seen corresponding path program 268 times [2018-09-30 11:01:27,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:27,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:27,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:27,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:27,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:27,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:27,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:27,386 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:27,392 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:27,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:27,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:27,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:27,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:27,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:27,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:27,449 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:27,449 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 11:01:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:28,145 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:01:28,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:28,145 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:28,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:28,145 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:01:28,145 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:01:28,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:01:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-30 11:01:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:28,466 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:28,466 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:28,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:28,466 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:28,466 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:01:28,466 INFO L423 AbstractCegarLoop]: === Iteration 285 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:28,466 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:28,467 INFO L82 PathProgramCache]: Analyzing trace with hash 471167680, now seen corresponding path program 269 times [2018-09-30 11:01:28,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:28,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:28,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:28,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:28,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:28,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:28,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:28,539 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:28,549 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:01:28,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:28,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:28,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:28,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:28,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:28,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:28,623 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:28,623 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:29,337 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:01:29,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:29,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:29,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:29,338 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:01:29,338 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:01:29,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:29,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:01:29,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 11:01:29,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:29,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:01:29,628 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:01:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:29,628 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:01:29,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:01:29,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:29,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:29,628 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:01:29,628 INFO L423 AbstractCegarLoop]: === Iteration 286 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:29,628 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:29,629 INFO L82 PathProgramCache]: Analyzing trace with hash 473012800, now seen corresponding path program 270 times [2018-09-30 11:01:29,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:29,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:29,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:29,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:29,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:29,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:29,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:29,692 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:29,702 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:01:29,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:29,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:29,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:29,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:29,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:29,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:29,767 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:29,767 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:01:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:30,446 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:01:30,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:30,446 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:30,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:30,447 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:01:30,447 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:01:30,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:30,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:01:30,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 11:01:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:30,747 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:30,747 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:30,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:30,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:30,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:30,747 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:30,747 INFO L423 AbstractCegarLoop]: === Iteration 287 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:30,747 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:30,748 INFO L82 PathProgramCache]: Analyzing trace with hash 473014722, now seen corresponding path program 271 times [2018-09-30 11:01:30,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:30,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:30,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:30,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:30,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:30,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:30,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:30,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:30,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:30,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:30,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:30,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:30,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:30,869 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:30,870 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:31,519 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:01:31,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:31,519 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:31,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:31,519 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:01:31,519 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:01:31,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:31,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:01:31,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-09-30 11:01:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 11:01:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 11:01:31,731 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-09-30 11:01:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:31,731 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 11:01:31,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 11:01:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:31,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:31,731 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 11:01:31,732 INFO L423 AbstractCegarLoop]: === Iteration 288 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:31,732 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:31,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1023196730, now seen corresponding path program 272 times [2018-09-30 11:01:31,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:31,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:31,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:31,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:31,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:31,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:31,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:31,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:31,796 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:31,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:31,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:31,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:31,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:31,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:31,853 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:31,853 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-09-30 11:01:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:32,588 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:01:32,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:32,588 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:32,589 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:01:32,589 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:01:32,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:01:32,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 11:01:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:32,909 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:32,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:32,909 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:32,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:32,909 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:32,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:32,909 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:01:32,910 INFO L423 AbstractCegarLoop]: === Iteration 289 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:32,910 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:32,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1023198652, now seen corresponding path program 273 times [2018-09-30 11:01:32,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:32,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:32,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:32,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:32,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:32,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:32,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:32,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:32,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:01:32,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:32,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:33,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:33,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:33,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:33,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:33,037 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:33,037 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:33,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:33,796 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:01:33,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:33,796 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:33,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:33,797 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:01:33,797 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:01:33,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:01:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 11:01:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:01:34,130 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:01:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:34,130 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:01:34,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:01:34,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:34,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:34,131 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:01:34,131 INFO L423 AbstractCegarLoop]: === Iteration 290 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:34,131 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:34,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1025043772, now seen corresponding path program 274 times [2018-09-30 11:01:34,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:34,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:34,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:34,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:34,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:34,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:34,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:34,190 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:34,196 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:34,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:34,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:34,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:34,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:34,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:34,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:34,380 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:34,380 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:01:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:35,124 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:01:35,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:35,124 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:35,125 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:01:35,125 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:01:35,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:01:35,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 11:01:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:35,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:35,457 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:35,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:35,457 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:35,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:35,457 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:35,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:35,457 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:35,457 INFO L423 AbstractCegarLoop]: === Iteration 291 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:35,458 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:35,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1025045694, now seen corresponding path program 275 times [2018-09-30 11:01:35,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:35,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:35,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:35,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:35,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:35,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:35,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:35,520 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:35,531 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:01:35,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:35,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:35,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:35,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:35,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:35,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:35,581 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:35,581 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:36,336 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:01:36,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:36,337 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:36,337 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:01:36,338 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:01:36,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:01:36,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 11:01:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:01:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:01:36,648 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 11:01:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:36,648 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:01:36,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:01:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:36,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:36,649 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:01:36,649 INFO L423 AbstractCegarLoop]: === Iteration 292 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:36,649 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:36,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1496763204, now seen corresponding path program 276 times [2018-09-30 11:01:36,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:36,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:36,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:36,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:36,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:36,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:36,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:36,708 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:36,720 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:01:36,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:36,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:36,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:36,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:36,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:36,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:36,781 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:36,781 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 11:01:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:37,499 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:01:37,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:37,500 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:37,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:37,500 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:01:37,500 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:01:37,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:01:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 11:01:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:37,841 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:37,841 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:37,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:37,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:37,841 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:37,841 INFO L423 AbstractCegarLoop]: === Iteration 293 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:37,841 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:37,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1496761282, now seen corresponding path program 277 times [2018-09-30 11:01:37,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:37,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:37,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:37,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:37,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:37,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:37,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:37,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:37,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:37,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:37,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:37,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:37,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:37,977 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:37,977 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:38,715 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:01:38,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:38,715 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:38,716 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:01:38,716 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:01:38,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:38,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:01:39,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 11:01:39,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:01:39,115 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:01:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:39,115 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:01:39,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:01:39,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:39,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:39,115 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:39,116 INFO L423 AbstractCegarLoop]: === Iteration 294 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:39,116 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:39,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1494916162, now seen corresponding path program 278 times [2018-09-30 11:01:39,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:39,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:39,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:39,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:39,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:39,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:39,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:39,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:39,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:39,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:39,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:39,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:39,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:39,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:39,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:39,248 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:39,248 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:01:39,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:39,940 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:01:39,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:39,940 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:39,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:39,940 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:01:39,941 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:01:39,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:39,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:01:40,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 11:01:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:40,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:40,271 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:40,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:40,272 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:40,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:40,272 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:40,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:40,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:40,272 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:01:40,272 INFO L423 AbstractCegarLoop]: === Iteration 295 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:40,272 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:40,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1494914240, now seen corresponding path program 279 times [2018-09-30 11:01:40,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:40,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:40,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:40,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:40,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:40,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:40,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:40,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:40,344 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:01:40,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:40,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:40,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:40,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:40,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:40,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:40,403 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:40,403 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:41,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:41,050 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 11:01:41,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:41,051 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:41,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:41,051 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:01:41,051 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 11:01:41,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:41,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 11:01:41,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 11:01:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:01:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 11:01:41,322 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 11:01:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:41,322 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 11:01:41,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 11:01:41,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:41,323 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:41,323 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:01:41,323 INFO L423 AbstractCegarLoop]: === Iteration 296 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:41,323 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:41,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1703255100, now seen corresponding path program 280 times [2018-09-30 11:01:41,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:41,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:41,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:41,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:41,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:41,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:41,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:41,383 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:41,389 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:41,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:41,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:41,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:41,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:41,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:41,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:41,459 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:41,459 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 11:01:42,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:42,210 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:01:42,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:42,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:42,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:42,210 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:01:42,211 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:01:42,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:01:42,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 11:01:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:42,531 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:42,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:42,531 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:42,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:42,531 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:42,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:42,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:42,531 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:42,532 INFO L423 AbstractCegarLoop]: === Iteration 297 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:42,532 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:42,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1703257022, now seen corresponding path program 281 times [2018-09-30 11:01:42,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:42,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:42,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:42,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:42,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:42,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:42,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:42,589 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:42,598 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:01:42,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:42,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:42,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:42,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:42,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:42,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:42,671 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:42,671 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:43,430 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:01:43,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:43,430 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:43,430 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:01:43,430 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:01:43,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:43,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:01:43,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 11:01:43,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:43,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:01:43,745 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:01:43,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:43,745 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:01:43,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:43,745 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:01:43,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:43,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:43,745 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:43,745 INFO L423 AbstractCegarLoop]: === Iteration 298 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:43,745 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:43,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1705102142, now seen corresponding path program 282 times [2018-09-30 11:01:43,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:43,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:43,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:43,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:43,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:43,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:43,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:43,806 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:43,819 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:01:43,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:43,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:44,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:44,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:44,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:44,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:44,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:44,140 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:01:45,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:45,355 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:01:45,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:45,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:45,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:45,356 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:01:45,356 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:01:45,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:01:45,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 11:01:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:45,684 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:45,684 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:45,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:45,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:45,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:45,684 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:01:45,685 INFO L423 AbstractCegarLoop]: === Iteration 299 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:45,685 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:45,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1705104064, now seen corresponding path program 283 times [2018-09-30 11:01:45,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:45,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:45,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:45,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:45,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:45,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:45,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:45,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:45,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:45,801 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:45,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:45,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:45,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:45,801 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:45,801 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:46,538 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:01:46,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:46,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:46,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:46,539 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:01:46,539 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:01:46,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:01:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 11:01:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:01:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:01:46,957 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 11:01:46,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:46,957 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:01:46,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:46,957 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:01:46,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:46,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:46,957 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:46,958 INFO L423 AbstractCegarLoop]: === Iteration 300 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:46,958 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:46,958 INFO L82 PathProgramCache]: Analyzing trace with hash -816704834, now seen corresponding path program 284 times [2018-09-30 11:01:46,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:46,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:46,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:46,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:46,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:47,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:47,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:47,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:47,027 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:47,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:47,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:47,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:47,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:47,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:47,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:47,083 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:47,083 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 11:01:47,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:47,795 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:01:47,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:47,795 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:47,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:47,796 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:01:47,796 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:01:47,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:47,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:01:48,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 11:01:48,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:48,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:48,143 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:48,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:48,143 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:48,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:48,143 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:48,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:48,143 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:48,143 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:01:48,143 INFO L423 AbstractCegarLoop]: === Iteration 301 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:48,143 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:48,143 INFO L82 PathProgramCache]: Analyzing trace with hash -816702912, now seen corresponding path program 285 times [2018-09-30 11:01:48,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:48,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:48,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:48,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:48,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:48,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:48,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:48,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:48,214 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:01:48,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:48,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:48,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:48,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:48,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:48,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:48,268 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:48,269 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:48,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:48,971 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:01:48,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:48,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:48,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:48,972 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:01:48,972 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:01:48,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:48,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:01:49,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 11:01:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:49,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:01:49,292 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:01:49,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:49,292 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:01:49,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:01:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:49,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:49,293 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:01:49,293 INFO L423 AbstractCegarLoop]: === Iteration 302 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:49,293 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:49,293 INFO L82 PathProgramCache]: Analyzing trace with hash -814857792, now seen corresponding path program 286 times [2018-09-30 11:01:49,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:49,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:49,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:49,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:49,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:49,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:49,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:49,373 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:49,380 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:49,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:49,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:49,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:49,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:49,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:49,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:49,431 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:49,431 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:01:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:50,096 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:01:50,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:50,097 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:50,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:50,097 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:01:50,097 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:01:50,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:01:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 11:01:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:50,423 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:50,423 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:50,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:50,423 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:50,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:50,423 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:50,424 INFO L423 AbstractCegarLoop]: === Iteration 303 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:50,424 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:50,424 INFO L82 PathProgramCache]: Analyzing trace with hash -814855870, now seen corresponding path program 287 times [2018-09-30 11:01:50,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:50,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:50,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:50,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:50,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:50,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:50,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:50,484 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:50,493 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:01:50,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:50,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:50,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:50,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:50,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:50,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:50,561 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:50,561 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:51,207 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 11:01:51,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:51,207 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:51,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:51,208 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:01:51,208 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 11:01:51,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 11:01:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-30 11:01:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 11:01:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 11:01:51,454 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-30 11:01:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:51,454 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 11:01:51,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 11:01:51,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:51,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:51,454 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:01:51,454 INFO L423 AbstractCegarLoop]: === Iteration 304 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:51,454 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:51,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1724261308, now seen corresponding path program 288 times [2018-09-30 11:01:51,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:51,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:51,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:51,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:51,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:51,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:51,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:51,513 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:51,521 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:01:51,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:51,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:51,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:51,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:51,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:51,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:51,575 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:51,575 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-30 11:01:52,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:52,244 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:01:52,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:52,245 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:52,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:52,245 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:01:52,245 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:01:52,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:52,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:01:52,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 11:01:52,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:52,578 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:52,578 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:52,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:52,578 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:52,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:52,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:52,579 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:52,579 INFO L423 AbstractCegarLoop]: === Iteration 305 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:52,579 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:52,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1724263230, now seen corresponding path program 289 times [2018-09-30 11:01:52,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:52,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:52,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:52,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:52,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:52,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:52,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:52,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:52,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:52,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:52,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:52,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:52,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:52,699 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:52,699 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:53,369 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:01:53,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:53,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:53,370 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:01:53,370 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:01:53,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:53,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:01:53,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 11:01:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:53,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:01:53,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:01:53,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:53,695 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:01:53,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:53,695 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:01:53,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:53,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:53,696 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:53,696 INFO L423 AbstractCegarLoop]: === Iteration 306 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:53,696 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:53,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1726108350, now seen corresponding path program 290 times [2018-09-30 11:01:53,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:53,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:53,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:53,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:53,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:53,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:53,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:53,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:01:53,763 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:01:53,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:53,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:53,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:53,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:53,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:53,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:53,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:53,820 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:01:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:54,468 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 11:01:54,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:54,468 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:54,469 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:01:54,469 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 11:01:54,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:54,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 11:01:54,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-30 11:01:54,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:54,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:54,812 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:54,812 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:54,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:54,812 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:54,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:54,812 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:01:54,813 INFO L423 AbstractCegarLoop]: === Iteration 307 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:54,813 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:54,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1726110272, now seen corresponding path program 291 times [2018-09-30 11:01:54,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:54,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:54,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:54,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:54,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:54,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:54,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:54,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:01:54,896 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:01:54,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:54,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:54,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:54,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:54,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:54,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:54,964 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:54,964 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:55,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:55,617 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 11:01:55,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:55,617 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:55,617 INFO L225 Difference]: With dead ends: 45 [2018-09-30 11:01:55,618 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 11:01:55,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 11:01:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 11:01:55,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:01:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:01:55,923 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 11:01:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:55,923 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:01:55,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:01:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:55,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:55,924 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:55,924 INFO L423 AbstractCegarLoop]: === Iteration 308 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:55,924 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:55,924 INFO L82 PathProgramCache]: Analyzing trace with hash -795698626, now seen corresponding path program 292 times [2018-09-30 11:01:55,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:55,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:55,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:55,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:55,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:55,977 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:55,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:55,984 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:01:55,990 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:01:55,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:55,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:56,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:56,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:56,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:56,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:56,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:56,046 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 11:01:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:56,732 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:01:56,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:56,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:56,732 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:01:56,733 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:01:56,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:56,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:01:57,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 11:01:57,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:57,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:57,071 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:57,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:57,071 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:57,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:57,071 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:57,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:57,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:57,072 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:01:57,072 INFO L423 AbstractCegarLoop]: === Iteration 309 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:57,072 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:57,072 INFO L82 PathProgramCache]: Analyzing trace with hash -795696704, now seen corresponding path program 293 times [2018-09-30 11:01:57,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:57,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:57,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:57,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:57,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:57,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:57,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:57,134 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:01:57,144 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:01:57,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:57,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:57,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:57,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:57,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:57,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:57,203 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:57,203 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:01:57,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:57,913 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:01:57,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:57,913 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:57,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:57,914 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:01:57,914 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:01:57,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:01:58,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 11:01:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:01:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:01:58,237 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:01:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:58,237 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:01:58,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:58,237 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:01:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:58,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:58,237 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:01:58,237 INFO L423 AbstractCegarLoop]: === Iteration 310 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:58,238 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:58,238 INFO L82 PathProgramCache]: Analyzing trace with hash -793851584, now seen corresponding path program 294 times [2018-09-30 11:01:58,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:58,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:58,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:58,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:58,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:58,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:58,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:58,299 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:01:58,314 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:01:58,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:01:58,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:58,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:58,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:58,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:58,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:58,420 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:58,420 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:01:59,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:01:59,086 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 11:01:59,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:01:59,086 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:01:59,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:01:59,087 INFO L225 Difference]: With dead ends: 47 [2018-09-30 11:01:59,087 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 11:01:59,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:01:59,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 11:01:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-30 11:01:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:01:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:01:59,451 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:01:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:01:59,452 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:01:59,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:01:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:01:59,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:01:59,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:01:59,452 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:01:59,452 INFO L423 AbstractCegarLoop]: === Iteration 311 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:01:59,452 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:01:59,452 INFO L82 PathProgramCache]: Analyzing trace with hash -793849662, now seen corresponding path program 295 times [2018-09-30 11:01:59,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:01:59,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:01:59,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:59,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:01:59,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:01:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:59,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:01:59,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:01:59,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:01:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:01:59,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:01:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:01:59,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:01:59,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:01:59,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:01:59,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:01:59,593 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:01:59,593 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:00,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:00,237 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 11:02:00,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:00,241 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:00,241 INFO L225 Difference]: With dead ends: 45 [2018-09-30 11:02:00,241 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 11:02:00,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:00,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 11:02:00,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 11:02:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:02:00,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 11:02:00,538 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 11:02:00,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:00,538 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 11:02:00,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:00,538 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 11:02:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:00,538 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:00,538 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:00,538 INFO L423 AbstractCegarLoop]: === Iteration 312 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:00,538 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:00,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1890647618, now seen corresponding path program 296 times [2018-09-30 11:02:00,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:00,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:00,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:00,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:00,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:00,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:00,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:00,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:02:00,608 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:02:00,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:00,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:00,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:00,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:00,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:00,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:00,664 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:00,664 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 11:02:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:01,289 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 11:02:01,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:01,289 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:01,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:01,290 INFO L225 Difference]: With dead ends: 45 [2018-09-30 11:02:01,290 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 11:02:01,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:01,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 11:02:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-30 11:02:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:01,647 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:01,647 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:01,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:01,647 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:01,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:01,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:01,647 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:02:01,648 INFO L423 AbstractCegarLoop]: === Iteration 313 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:01,648 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:01,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1890645696, now seen corresponding path program 297 times [2018-09-30 11:02:01,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:01,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:01,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:01,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:01,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:01,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:01,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:01,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:02:01,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:02:01,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:01,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:01,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:01,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:01,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:01,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:01,862 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:01,862 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:02,465 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 11:02:02,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:02,465 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:02,466 INFO L225 Difference]: With dead ends: 43 [2018-09-30 11:02:02,466 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 11:02:02,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 11:02:02,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-30 11:02:02,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:02:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:02:02,805 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:02:02,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:02,805 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:02:02,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:02:02,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:02,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:02,805 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:02:02,805 INFO L423 AbstractCegarLoop]: === Iteration 314 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:02,805 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:02,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1888800576, now seen corresponding path program 298 times [2018-09-30 11:02:02,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:02,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:02,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:02,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:02,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:02,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:02,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:02,872 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:02:02,902 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:02:02,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:02,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:03,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:03,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:03,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:03,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:03,012 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:03,012 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:02:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:03,710 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 11:02:03,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:03,710 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:03,711 INFO L225 Difference]: With dead ends: 45 [2018-09-30 11:02:03,711 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 11:02:03,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:03,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 11:02:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-30 11:02:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:04,081 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:04,081 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:04,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:04,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:04,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:04,081 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:04,081 INFO L423 AbstractCegarLoop]: === Iteration 315 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:04,081 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:04,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1888798654, now seen corresponding path program 299 times [2018-09-30 11:02:04,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:04,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:04,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:04,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:04,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:04,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:04,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:04,142 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:02:04,151 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:02:04,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:04,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:04,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:04,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:04,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:04,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:04,221 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:04,221 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:04,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:04,801 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 11:02:04,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:04,802 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:04,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:04,802 INFO L225 Difference]: With dead ends: 43 [2018-09-30 11:02:04,802 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 11:02:04,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:04,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 11:02:05,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 11:02:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:02:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:02:05,114 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 11:02:05,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:05,114 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:02:05,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:02:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:05,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:05,114 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:02:05,115 INFO L423 AbstractCegarLoop]: === Iteration 316 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:05,115 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:05,115 INFO L82 PathProgramCache]: Analyzing trace with hash -115640256, now seen corresponding path program 300 times [2018-09-30 11:02:05,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:05,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:05,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:05,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:05,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:05,166 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:05,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:05,175 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:02:05,184 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:02:05,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:05,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:05,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:05,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:05,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:05,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:05,249 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:05,249 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 11:02:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:05,808 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 11:02:05,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:05,808 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:05,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:05,809 INFO L225 Difference]: With dead ends: 41 [2018-09-30 11:02:05,809 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 11:02:05,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 11:02:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-09-30 11:02:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:06,149 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:06,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:06,149 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:06,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:06,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:06,149 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:06,150 INFO L423 AbstractCegarLoop]: === Iteration 317 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:06,150 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:06,150 INFO L82 PathProgramCache]: Analyzing trace with hash -115638334, now seen corresponding path program 301 times [2018-09-30 11:02:06,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:06,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:06,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:06,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:06,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:06,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:06,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:06,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:06,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:06,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:06,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:06,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:06,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:06,267 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:06,267 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:06,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:06,837 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 11:02:06,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:06,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:06,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:06,838 INFO L225 Difference]: With dead ends: 41 [2018-09-30 11:02:06,838 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 11:02:06,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:06,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 11:02:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-09-30 11:02:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:02:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:02:07,173 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:02:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:07,173 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:02:07,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:07,173 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:02:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:07,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:07,173 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:07,173 INFO L423 AbstractCegarLoop]: === Iteration 318 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:07,173 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:07,173 INFO L82 PathProgramCache]: Analyzing trace with hash -113793214, now seen corresponding path program 302 times [2018-09-30 11:02:07,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:07,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:07,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:07,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:07,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:07,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:07,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:07,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:02:07,243 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:02:07,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:07,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:07,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:07,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:07,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:07,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:07,313 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:07,313 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:02:07,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:07,891 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 11:02:07,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:07,891 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:07,891 INFO L225 Difference]: With dead ends: 39 [2018-09-30 11:02:07,891 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 11:02:07,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:07,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 11:02:08,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-09-30 11:02:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:08,234 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:08,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:08,234 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:08,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:08,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:08,234 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:02:08,234 INFO L423 AbstractCegarLoop]: === Iteration 319 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:08,234 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:08,234 INFO L82 PathProgramCache]: Analyzing trace with hash -113791292, now seen corresponding path program 303 times [2018-09-30 11:02:08,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:08,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:08,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:08,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:08,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:08,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:08,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:08,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:02:08,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:02:08,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:08,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:08,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:08,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:08,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:08,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:08,369 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:08,369 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:08,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:08,894 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-09-30 11:02:08,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:08,895 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:08,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:08,895 INFO L225 Difference]: With dead ends: 38 [2018-09-30 11:02:08,895 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 11:02:08,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:08,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 11:02:09,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-09-30 11:02:09,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 11:02:09,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 11:02:09,104 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-09-30 11:02:09,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:09,105 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 11:02:09,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:09,105 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 11:02:09,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:09,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:09,105 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 11:02:09,105 INFO L423 AbstractCegarLoop]: === Iteration 320 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:09,105 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:09,105 INFO L82 PathProgramCache]: Analyzing trace with hash 330139066, now seen corresponding path program 304 times [2018-09-30 11:02:09,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:09,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:09,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:09,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:09,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:09,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:09,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:09,172 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:02:09,213 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:02:09,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:09,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:09,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:09,523 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:09,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:09,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:09,523 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:09,523 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-09-30 11:02:10,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:10,465 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:02:10,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:10,465 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:10,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:10,465 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:02:10,465 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:02:10,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:10,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:02:10,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 11:02:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:10,845 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:10,845 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:10,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:10,845 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:10,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:10,846 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:02:10,846 INFO L423 AbstractCegarLoop]: === Iteration 321 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:10,846 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:10,846 INFO L82 PathProgramCache]: Analyzing trace with hash 330140988, now seen corresponding path program 305 times [2018-09-30 11:02:10,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:10,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:10,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:10,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:10,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:10,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:10,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:10,911 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:02:10,922 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:02:10,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:10,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:10,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:10,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:10,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:10,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:10,974 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:10,974 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:11,952 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:02:11,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:11,952 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:11,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:11,953 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:02:11,953 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:02:11,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:11,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:02:12,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 11:02:12,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:02:12,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:02:12,356 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:02:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:12,356 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:02:12,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:02:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:12,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:12,356 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:02:12,357 INFO L423 AbstractCegarLoop]: === Iteration 322 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:12,357 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:12,357 INFO L82 PathProgramCache]: Analyzing trace with hash 331986108, now seen corresponding path program 306 times [2018-09-30 11:02:12,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:12,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:12,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:12,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:12,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:12,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:12,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:12,418 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:02:12,430 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:02:12,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:12,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:12,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:12,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:12,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:12,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:12,497 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:12,497 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:02:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:13,401 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 11:02:13,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:13,402 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:13,402 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:02:13,402 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:02:13,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:02:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 11:02:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:13,782 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:13,782 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:13,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:13,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:13,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:13,782 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:13,782 INFO L423 AbstractCegarLoop]: === Iteration 323 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:13,783 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:13,783 INFO L82 PathProgramCache]: Analyzing trace with hash 331988030, now seen corresponding path program 307 times [2018-09-30 11:02:13,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:13,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:13,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:13,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:13,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:13,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:13,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:13,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:13,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:13,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:13,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:13,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:13,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:13,919 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:13,919 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:14,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:14,805 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:02:14,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:14,805 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:14,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:14,805 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:02:14,805 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:02:14,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:14,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:02:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 11:02:15,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:02:15,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:02:15,156 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 11:02:15,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:15,156 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:02:15,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:15,156 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:02:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:15,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:15,156 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:02:15,156 INFO L423 AbstractCegarLoop]: === Iteration 324 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:15,157 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:15,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2105146428, now seen corresponding path program 308 times [2018-09-30 11:02:15,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:15,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:15,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:15,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:15,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:15,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:15,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:15,217 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:02:15,239 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:02:15,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:15,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:15,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:15,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:15,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:15,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:15,301 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:15,301 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 11:02:16,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:16,235 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:02:16,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:16,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:16,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:16,235 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:02:16,235 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:02:16,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:02:16,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 11:02:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:16,765 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:16,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:16,765 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:16,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:16,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:16,765 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:16,766 INFO L423 AbstractCegarLoop]: === Iteration 325 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:16,766 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:16,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2105148350, now seen corresponding path program 309 times [2018-09-30 11:02:16,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:16,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:16,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:16,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:16,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:16,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:16,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:16,830 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:02:16,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:02:16,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:16,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:16,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:16,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:16,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:16,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:16,904 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:16,904 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:17,841 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:02:17,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:17,841 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:17,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:17,842 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:02:17,842 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:02:17,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:17,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:02:18,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 11:02:18,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:02:18,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:02:18,247 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:02:18,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:18,247 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:02:18,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:02:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:18,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:18,248 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:18,248 INFO L423 AbstractCegarLoop]: === Iteration 326 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:18,248 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:18,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2106993470, now seen corresponding path program 310 times [2018-09-30 11:02:18,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:18,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:18,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:18,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:18,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:18,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:18,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:18,309 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:02:18,316 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:02:18,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:18,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:18,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:18,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:18,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:18,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:18,372 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:18,372 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:02:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:19,270 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 11:02:19,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:19,270 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:19,271 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:02:19,271 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:02:19,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:19,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:02:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 11:02:19,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:19,658 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:19,658 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:19,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:19,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:19,659 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:02:19,659 INFO L423 AbstractCegarLoop]: === Iteration 327 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:19,659 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:19,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2106995392, now seen corresponding path program 311 times [2018-09-30 11:02:19,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:19,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:19,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:19,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:19,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:19,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:19,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:19,734 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:02:19,745 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:02:19,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:19,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:20,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:20,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:20,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:20,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:20,038 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:20,038 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:20,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:20,920 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:02:20,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:20,920 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:20,920 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:02:20,921 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:02:20,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:20,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:02:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 11:02:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:02:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 11:02:21,274 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 11:02:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:21,274 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 11:02:21,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 11:02:21,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:21,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:21,275 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:02:21,275 INFO L423 AbstractCegarLoop]: === Iteration 328 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:21,275 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:21,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1010197436, now seen corresponding path program 312 times [2018-09-30 11:02:21,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:21,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:21,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:21,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:21,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:21,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:21,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:21,340 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:02:21,349 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:02:21,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:21,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:21,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:21,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:21,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:21,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:21,412 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:21,412 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 11:02:22,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:22,286 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:02:22,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:22,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:22,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:22,287 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:02:22,287 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:02:22,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:02:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 11:02:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:22,701 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:22,701 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:22,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:22,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:22,701 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:22,701 INFO L423 AbstractCegarLoop]: === Iteration 329 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:22,701 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:22,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1010199358, now seen corresponding path program 313 times [2018-09-30 11:02:22,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:22,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:22,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:22,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:22,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:22,758 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:22,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:22,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:22,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:22,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:22,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:22,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:22,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:22,824 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:22,824 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:23,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:23,693 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:02:23,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:23,693 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:23,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:23,694 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:02:23,694 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:02:23,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:02:24,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 11:02:24,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:02:24,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:02:24,105 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:02:24,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:24,105 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:02:24,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:24,105 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:02:24,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:24,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:24,105 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:24,105 INFO L423 AbstractCegarLoop]: === Iteration 330 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:24,105 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:24,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1012044478, now seen corresponding path program 314 times [2018-09-30 11:02:24,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:24,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:24,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:24,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:24,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:24,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:24,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:24,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:02:24,174 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:02:24,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:24,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:24,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:24,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:24,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:24,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:24,229 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:24,229 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:02:25,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:25,114 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:02:25,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:25,114 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:25,114 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:02:25,114 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:02:25,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:25,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:02:25,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 11:02:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:25,529 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:25,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:25,530 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:25,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:25,530 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:25,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:25,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:25,530 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:02:25,530 INFO L423 AbstractCegarLoop]: === Iteration 331 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:25,530 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:25,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1012046400, now seen corresponding path program 315 times [2018-09-30 11:02:25,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:25,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:25,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:25,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:25,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:25,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:25,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:25,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:02:25,600 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:02:25,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:25,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:25,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:25,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:25,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:25,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:25,669 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:25,669 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:26,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:26,494 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:02:26,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:26,494 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:26,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:26,495 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:02:26,495 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:02:26,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:26,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 11:02:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-30 11:02:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:02:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:02:26,857 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 11:02:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:26,857 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:02:26,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:26,857 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:02:26,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:26,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:26,857 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:26,857 INFO L423 AbstractCegarLoop]: === Iteration 332 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:26,857 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:26,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1509762498, now seen corresponding path program 316 times [2018-09-30 11:02:26,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:26,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:26,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:26,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:26,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:26,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:26,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:26,929 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:02:26,936 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:02:26,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:26,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:27,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:27,002 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:27,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:27,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:27,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:27,002 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 11:02:27,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:27,818 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:02:27,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:27,818 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:27,818 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:02:27,818 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:02:27,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:02:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-30 11:02:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:28,204 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:28,204 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:28,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:28,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:28,204 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:02:28,204 INFO L423 AbstractCegarLoop]: === Iteration 333 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:28,204 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:28,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1509760576, now seen corresponding path program 317 times [2018-09-30 11:02:28,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:28,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:28,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:28,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:28,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:28,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:28,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:28,262 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:02:28,271 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:02:28,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:28,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:28,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:28,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:28,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:28,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:28,342 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:28,342 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:29,139 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 11:02:29,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:29,139 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:29,139 INFO L225 Difference]: With dead ends: 53 [2018-09-30 11:02:29,139 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 11:02:29,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:29,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 11:02:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 11:02:29,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:02:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:02:29,524 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:02:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:29,524 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:02:29,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:02:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:29,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:29,524 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:02:29,524 INFO L423 AbstractCegarLoop]: === Iteration 334 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:29,525 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:29,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1507915456, now seen corresponding path program 318 times [2018-09-30 11:02:29,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:29,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:29,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:29,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:29,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:29,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:29,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:29,584 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:02:29,596 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:02:29,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:29,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:29,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:29,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:29,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:29,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:29,654 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:29,654 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:02:30,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:30,438 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 11:02:30,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:30,438 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:30,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:30,438 INFO L225 Difference]: With dead ends: 51 [2018-09-30 11:02:30,439 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 11:02:30,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 11:02:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 11:02:30,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:30,828 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:30,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:30,828 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:30,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:30,828 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:30,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:30,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:30,828 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:30,828 INFO L423 AbstractCegarLoop]: === Iteration 335 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:30,829 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:30,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1507913534, now seen corresponding path program 319 times [2018-09-30 11:02:30,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:30,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:30,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:30,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:30,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:30,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:30,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:30,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:30,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:30,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:30,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:30,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:30,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:30,962 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:30,962 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:31,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:31,706 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 11:02:31,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:31,707 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:31,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:31,707 INFO L225 Difference]: With dead ends: 49 [2018-09-30 11:02:31,707 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 11:02:31,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:31,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 11:02:32,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 11:02:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 11:02:32,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 11:02:32,008 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-30 11:02:32,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:32,008 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 11:02:32,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 11:02:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:32,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:32,008 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 11:02:32,008 INFO L423 AbstractCegarLoop]: === Iteration 336 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:32,009 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:32,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1031203644, now seen corresponding path program 320 times [2018-09-30 11:02:32,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:32,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:32,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:32,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:32,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:32,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:32,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:32,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:02:32,087 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:02:32,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:32,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:32,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:32,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:32,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:32,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:32,154 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:32,154 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-30 11:02:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:33,093 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:02:33,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:33,093 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:33,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:33,094 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:02:33,094 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:02:33,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:02:33,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 11:02:33,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:33,498 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:33,498 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:33,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:33,498 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:33,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:33,498 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:33,498 INFO L423 AbstractCegarLoop]: === Iteration 337 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:33,499 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:33,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1031205566, now seen corresponding path program 321 times [2018-09-30 11:02:33,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:33,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:33,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:33,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:33,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:33,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:33,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:33,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:02:33,568 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:02:33,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:33,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:33,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:33,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:33,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:33,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:33,644 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:33,644 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:34,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:34,613 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:02:34,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:34,613 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:34,614 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:02:34,614 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:02:34,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:02:34,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 11:02:34,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:02:34,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:02:34,996 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:02:34,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:34,996 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:02:34,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:02:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:34,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:34,997 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:34,997 INFO L423 AbstractCegarLoop]: === Iteration 338 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:34,997 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:34,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1033050686, now seen corresponding path program 322 times [2018-09-30 11:02:34,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:34,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:34,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:34,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:34,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:35,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:35,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:35,072 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:02:35,079 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:02:35,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:35,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:35,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:35,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:35,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:35,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:35,159 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:35,159 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:02:36,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:36,148 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 11:02:36,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:36,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:36,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:36,149 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:02:36,149 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:02:36,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:36,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:02:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 11:02:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:36,555 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:36,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:36,555 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:36,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:36,555 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:36,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:36,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:36,556 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:02:36,556 INFO L423 AbstractCegarLoop]: === Iteration 339 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:36,556 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:36,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1033052608, now seen corresponding path program 323 times [2018-09-30 11:02:36,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:36,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:36,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:36,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:36,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:36,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:36,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:36,612 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:02:36,620 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:02:36,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:36,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:36,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:36,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:36,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:36,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:36,674 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:36,674 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:37,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:37,563 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:02:37,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:37,563 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:37,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:37,564 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:02:37,564 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:02:37,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:02:37,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 11:02:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 11:02:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 11:02:37,932 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 11:02:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:37,933 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 11:02:37,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 11:02:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:37,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:37,933 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:37,933 INFO L423 AbstractCegarLoop]: === Iteration 340 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:37,933 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:37,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1488756290, now seen corresponding path program 324 times [2018-09-30 11:02:37,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:37,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:37,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:37,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:37,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:37,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:37,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:37,993 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 11:02:38,003 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 11:02:38,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:38,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:38,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:38,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:38,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:38,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:38,067 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:38,067 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 11:02:39,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:39,037 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:02:39,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:39,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:39,038 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:02:39,038 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:02:39,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:39,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:02:39,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 11:02:39,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:39,461 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:39,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:39,461 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:39,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:39,461 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:39,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:39,461 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:02:39,462 INFO L423 AbstractCegarLoop]: === Iteration 341 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:39,462 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:39,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1488754368, now seen corresponding path program 325 times [2018-09-30 11:02:39,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:39,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:39,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:39,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:39,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:39,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:39,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:39,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:39,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:39,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:39,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:39,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:39,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:39,590 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:39,590 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:40,542 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 11:02:40,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:40,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:40,542 INFO L225 Difference]: With dead ends: 61 [2018-09-30 11:02:40,542 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 11:02:40,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:40,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 11:02:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 11:02:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:02:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 11:02:40,932 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 11:02:40,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:40,932 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 11:02:40,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:40,932 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 11:02:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:40,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:40,933 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:02:40,933 INFO L423 AbstractCegarLoop]: === Iteration 342 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:40,933 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:40,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1486909248, now seen corresponding path program 326 times [2018-09-30 11:02:40,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:40,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:40,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:40,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 11:02:40,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:40,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:40,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:40,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 11:02:40,995 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 11:02:40,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:40,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:41,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:41,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:41,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:41,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:41,050 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:41,050 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 11:02:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:41,992 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 11:02:41,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:41,992 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:41,993 INFO L225 Difference]: With dead ends: 59 [2018-09-30 11:02:41,993 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 11:02:41,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 11:02:42,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 11:02:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:42,388 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:42,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:42,388 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:42,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:42,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:42,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:42,388 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:42,388 INFO L423 AbstractCegarLoop]: === Iteration 343 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:42,389 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:42,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1486907326, now seen corresponding path program 327 times [2018-09-30 11:02:42,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:42,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:42,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:42,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:42,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:42,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:42,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:42,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 11:02:42,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 11:02:42,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:42,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:42,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:42,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:42,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:42,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:42,530 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:42,530 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:43,439 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:02:43,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:43,439 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:43,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:43,440 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:02:43,440 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:02:43,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:02:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 11:02:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 11:02:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 11:02:43,776 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 11:02:43,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:43,776 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 11:02:43,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 11:02:43,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:43,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:43,777 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 11:02:43,777 INFO L423 AbstractCegarLoop]: === Iteration 344 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:43,777 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:43,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1711262014, now seen corresponding path program 328 times [2018-09-30 11:02:43,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:43,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:43,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:43,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:43,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:43,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:43,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:43,839 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 11:02:43,844 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 11:02:43,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:43,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:43,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:43,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:43,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:43,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:43,902 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:43,902 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 11:02:44,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:44,802 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 11:02:44,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:44,803 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:44,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:44,803 INFO L225 Difference]: With dead ends: 57 [2018-09-30 11:02:44,803 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 11:02:44,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:44,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 11:02:45,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 11:02:45,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 11:02:45,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 11:02:45,200 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 11:02:45,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 11:02:45,200 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 11:02:45,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 11:02:45,201 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 11:02:45,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 11:02:45,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 11:02:45,201 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 11:02:45,201 INFO L423 AbstractCegarLoop]: === Iteration 345 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 11:02:45,201 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 11:02:45,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1711263936, now seen corresponding path program 329 times [2018-09-30 11:02:45,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 11:02:45,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 11:02:45,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:45,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 11:02:45,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 11:02:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 11:02:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:45,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 11:02:45,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 11:02:45,280 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 11:02:45,289 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 11:02:45,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 11:02:45,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 11:02:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 11:02:45,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 11:02:45,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 11:02:45,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 11:02:45,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 11:02:45,360 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 11:02:45,360 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 11:02:46,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 11:02:46,283 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 11:02:46,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 11:02:46,283 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 11:02:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 11:02:46,284 INFO L225 Difference]: With dead ends: 55 [2018-09-30 11:02:46,284 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 11:02:46,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 11:02:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. Received shutdown request... [2018-09-30 11:02:46,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 11:02:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 11:02:46,691 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 11:02:46,695 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 11:02:46,695 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:02:46 BoogieIcfgContainer [2018-09-30 11:02:46,696 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 11:02:46,696 INFO L168 Benchmark]: Toolchain (without parser) took 258972.19 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -410.5 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 373.0 MB). Peak memory consumption was 161.0 MB. Max. memory is 7.1 GB. [2018-09-30 11:02:46,755 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 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. [2018-09-30 11:02:46,755 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 11:02:46,756 INFO L168 Benchmark]: Boogie Preprocessor took 23.79 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. [2018-09-30 11:02:46,756 INFO L168 Benchmark]: RCFGBuilder took 339.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 11:02:46,756 INFO L168 Benchmark]: TraceAbstraction took 258559.03 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -410.5 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 351.8 MB). Peak memory consumption was 139.9 MB. Max. memory is 7.1 GB. [2018-09-30 11:02:46,759 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 0.21 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 41.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.79 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 339.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 258559.03 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -410.5 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 351.8 MB). Peak memory consumption was 139.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 29]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 29). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 258.4s OverallTime, 345 OverallIterations, 8 TraceHistogramMax, 147.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1382 SDtfs, 2605 SDslu, 4628 SDs, 0 SdLazy, 7879 SolverSat, 4380 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8152 GetRequests, 5549 SyntacticMatches, 0 SemanticMatches, 2603 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=256, 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: 53.7s AutomataMinimizationTime, 345 MinimizatonAttempts, 5078 StatesRemovedByMinimization, 344 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 41.8s InterpolantComputationTime, 11099 NumberOfCodeBlocks, 11099 NumberOfCodeBlocksAsserted, 1929 NumberOfCheckSat, 10410 ConstructedInterpolants, 0 QuantifiedInterpolants, 467400 SizeOfPredicates, 344 NumberOfNonLiveVariables, 14386 ConjunctsInSsa, 2946 ConjunctsInUnsatCore, 689 InterpolantComputations, 1 PerfectInterpolantSequences, 0/30964 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/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_11-02-46-769.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_11-02-46-769.csv Completed graceful shutdown