java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:28:49,501 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:28:49,503 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:28:49,519 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:28:49,519 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:28:49,521 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:28:49,522 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:28:49,526 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:28:49,528 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:28:49,530 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:28:49,531 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:28:49,556 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-26 21:28:49,585 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:28:49,585 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:28:49,586 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:28:49,586 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:28:49,586 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:28:49,587 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:28:49,587 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:28:49,587 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:28:49,587 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:28:49,587 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:28:49,588 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:28:49,588 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:28:49,588 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:28:49,588 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:28:49,588 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:28:49,589 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:28:49,589 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:28:49,589 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:28:49,589 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:28:49,589 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:28:49,590 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:28:49,590 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:28:49,590 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:28:49,590 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:28:49,590 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:28:49,590 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:28:49,591 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:28:49,591 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:28:49,591 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:28:49,591 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:28:49,644 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:28:49,658 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:28:49,663 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:28:49,665 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:28:49,667 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:28:49,668 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl [2018-09-26 21:28:49,668 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HiddenEquality-Safe.bpl' [2018-09-26 21:28:49,724 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:28:49,727 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:28:49,728 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:28:49,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:28:49,729 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:28:49,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:49" (1/1) ... [2018-09-26 21:28:49,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:49" (1/1) ... [2018-09-26 21:28:49,774 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:28:49,775 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:28:49,775 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:28:49,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:28:49,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:28:49,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:28:49,779 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:28:49,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:49" (1/1) ... [2018-09-26 21:28:49,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:49" (1/1) ... [2018-09-26 21:28:49,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:49" (1/1) ... [2018-09-26 21:28:49,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:49" (1/1) ... [2018-09-26 21:28:49,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:49" (1/1) ... [2018-09-26 21:28:49,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:49" (1/1) ... [2018-09-26 21:28:49,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:49" (1/1) ... [2018-09-26 21:28:49,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:28:49,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:28:49,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:28:49,806 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:28:49,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:49" (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 [2018-09-26 21:28:49,892 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-26 21:28:49,893 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-26 21:28:49,893 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-26 21:28:50,070 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:28:50,071 INFO L202 PluginConnector]: Adding new model HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:28:50 BoogieIcfgContainer [2018-09-26 21:28:50,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:28:50,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:28:50,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:28:50,076 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:28:50,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:49" (1/2) ... [2018-09-26 21:28:50,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412c4393 and model type HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:28:50, skipping insertion in model container [2018-09-26 21:28:50,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:28:50" (2/2) ... [2018-09-26 21:28:50,080 INFO L112 eAbstractionObserver]: Analyzing ICFG HiddenEquality-Safe.bpl [2018-09-26 21:28:50,091 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:28:50,103 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:28:50,158 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:28:50,159 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:28:50,159 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:28:50,159 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:28:50,159 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:28:50,160 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:28:50,160 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:28:50,160 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:28:50,160 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:28:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-26 21:28:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-26 21:28:50,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:50,181 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-26 21:28:50,182 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:50,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:50,189 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-26 21:28:50,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:50,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:50,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:50,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:50,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:50,350 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:28:50,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-26 21:28:50,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:28:50,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:28:50,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:28:50,372 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-26 21:28:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:50,416 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 21:28:50,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:28:50,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-26 21:28:50,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:50,429 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:28:50,429 INFO L226 Difference]: Without dead ends: 4 [2018-09-26 21:28:50,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:28:50,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-26 21:28:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-26 21:28:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-26 21:28:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-26 21:28:50,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-26 21:28:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:50,471 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-26 21:28:50,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:28:50,471 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-26 21:28:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:28:50,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:50,472 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:28:50,472 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:50,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:50,473 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-26 21:28:50,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:50,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:50,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:50,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:50,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:50,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:50,622 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 [2018-09-26 21:28:50,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:50,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:50,749 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:50,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-26 21:28:50,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:28:50,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:28:50,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:28:50,751 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-09-26 21:28:50,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:50,837 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-26 21:28:50,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:28:50,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-09-26 21:28:50,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:50,839 INFO L225 Difference]: With dead ends: 6 [2018-09-26 21:28:50,839 INFO L226 Difference]: Without dead ends: 5 [2018-09-26 21:28:50,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:28:50,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-26 21:28:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-26 21:28:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-26 21:28:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-26 21:28:50,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-26 21:28:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:50,843 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-26 21:28:50,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:28:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-26 21:28:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:28:50,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:50,844 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-26 21:28:50,845 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:50,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:50,845 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-26 21:28:50,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:50,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:50,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:50,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:50,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:50,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:50,937 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 [2018-09-26 21:28:50,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:50,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:50,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:50,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:50,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:50,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:28:50,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:28:50,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:28:50,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:28:50,999 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-26 21:28:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:51,026 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-26 21:28:51,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:28:51,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-26 21:28:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:51,027 INFO L225 Difference]: With dead ends: 7 [2018-09-26 21:28:51,027 INFO L226 Difference]: Without dead ends: 6 [2018-09-26 21:28:51,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:28:51,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-26 21:28:51,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-26 21:28:51,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 21:28:51,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-26 21:28:51,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-26 21:28:51,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:51,030 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-26 21:28:51,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:28:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-26 21:28:51,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:28:51,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:51,031 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-26 21:28:51,031 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:51,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:51,032 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-26 21:28:51,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:51,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:51,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:51,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:51,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:51,127 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:51,128 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 [2018-09-26 21:28:51,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:51,157 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:28:51,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:51,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:51,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:51,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:28:51,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:28:51,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:28:51,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:28:51,185 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-26 21:28:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:51,246 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-26 21:28:51,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:28:51,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-26 21:28:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:51,247 INFO L225 Difference]: With dead ends: 8 [2018-09-26 21:28:51,247 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:28:51,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:28:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:28:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:28:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:28:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:28:51,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-26 21:28:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:51,252 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:28:51,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:28:51,252 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:28:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:28:51,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:51,253 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-26 21:28:51,253 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:51,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:51,253 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-26 21:28:51,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:51,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:51,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:51,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:51,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:51,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:51,504 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 [2018-09-26 21:28:51,521 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:51,557 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:51,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:51,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:51,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:51,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:28:51,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:28:51,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:28:51,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:28:51,590 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-26 21:28:51,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:51,625 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 21:28:51,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:28:51,625 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-26 21:28:51,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:51,626 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:28:51,627 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:28:51,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:28:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:28:51,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:28:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:28:51,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-26 21:28:51,631 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-26 21:28:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:51,631 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-26 21:28:51,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:28:51,632 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-26 21:28:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:28:51,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:51,632 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-26 21:28:51,633 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:51,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-26 21:28:51,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:51,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:51,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:51,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:51,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:51,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:51,806 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 [2018-09-26 21:28:51,816 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:51,835 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:28:51,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:51,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:51,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:51,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:28:51,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:28:51,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:28:51,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:28:51,870 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-26 21:28:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:51,908 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-26 21:28:51,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:28:51,908 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-26 21:28:51,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:51,909 INFO L225 Difference]: With dead ends: 10 [2018-09-26 21:28:51,909 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:28:51,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:28:51,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:28:51,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:28:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:28:51,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:28:51,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-26 21:28:51,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:51,914 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:28:51,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:28:51,914 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:28:51,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:28:51,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:51,915 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-26 21:28:51,915 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:51,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:51,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-26 21:28:51,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:51,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:51,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:51,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:51,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:52,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:52,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:52,122 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:52,136 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-26 21:28:52,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:52,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:52,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:52,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:28:52,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:28:52,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:28:52,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:28:52,174 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-26 21:28:52,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:52,213 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:28:52,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:28:52,213 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-26 21:28:52,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:52,214 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:28:52,214 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:28:52,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:28:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:28:52,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-26 21:28:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:28:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-26 21:28:52,219 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-26 21:28:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:52,219 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-26 21:28:52,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:28:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-26 21:28:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:28:52,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:52,220 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-26 21:28:52,220 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:52,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:52,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-26 21:28:52,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:52,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:52,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:52,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:52,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:52,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:52,358 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 [2018-09-26 21:28:52,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:52,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:52,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:52,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:28:52,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:28:52,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:28:52,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:28:52,437 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-26 21:28:52,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:52,655 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-26 21:28:52,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:28:52,656 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-26 21:28:52,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:52,657 INFO L225 Difference]: With dead ends: 12 [2018-09-26 21:28:52,658 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:28:52,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:28:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:28:52,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:28:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:28:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:28:52,663 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-26 21:28:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:52,663 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:28:52,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:28:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:28:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:28:52,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:52,664 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-26 21:28:52,664 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:52,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-26 21:28:52,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:52,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:52,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:52,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:52,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:52,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:52,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:52,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:52,908 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:52,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:52,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:52,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:52,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:28:52,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:28:52,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:28:52,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:28:52,946 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-26 21:28:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:52,991 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:28:52,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:28:52,992 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-26 21:28:52,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:52,992 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:28:52,993 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:28:52,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:28:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:28:52,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-26 21:28:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:28:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-26 21:28:52,996 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-26 21:28:52,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:52,997 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-26 21:28:52,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:28:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-26 21:28:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:28:52,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:52,998 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-26 21:28:52,998 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:52,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:52,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-26 21:28:52,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:52,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:52,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:53,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:53,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:53,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:53,169 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:53,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:53,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:28:53,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:53,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:53,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:53,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:28:53,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:28:53,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:28:53,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:28:53,234 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-26 21:28:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:53,275 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-26 21:28:53,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:28:53,276 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-26 21:28:53,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:53,277 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:28:53,277 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:28:53,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:28:53,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:28:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:28:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:28:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:28:53,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-26 21:28:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:53,282 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:28:53,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:28:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:28:53,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:28:53,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:53,283 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-26 21:28:53,283 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:53,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:53,283 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-26 21:28:53,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:53,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:53,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:53,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:53,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:53,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:53,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:53,497 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:53,511 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:53,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:53,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:53,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:53,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:28:53,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:28:53,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:28:53,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:28:53,549 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-26 21:28:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:53,624 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:28:53,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:28:53,625 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-26 21:28:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:53,626 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:28:53,626 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:28:53,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:28:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:28:53,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-26 21:28:53,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:28:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-26 21:28:53,630 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-26 21:28:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:53,631 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-26 21:28:53,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:28:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-26 21:28:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:28:53,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:53,631 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-26 21:28:53,632 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:53,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:53,632 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-26 21:28:53,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:53,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:53,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:53,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:53,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:53,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:53,895 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 [2018-09-26 21:28:53,907 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:53,924 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:28:53,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:53,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:53,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:53,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:28:53,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:28:53,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:28:53,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:28:53,969 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-26 21:28:54,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:54,112 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-26 21:28:54,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:28:54,112 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-26 21:28:54,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:54,113 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:28:54,113 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:28:54,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:28:54,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:28:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:28:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:28:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:28:54,116 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-26 21:28:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:54,116 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:28:54,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:28:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:28:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:28:54,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:54,117 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-26 21:28:54,117 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:54,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:54,118 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-26 21:28:54,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:54,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:54,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:54,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:54,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:54,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:54,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:54,323 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:54,335 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:28:54,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:54,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:54,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:54,373 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:28:54,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:28:54,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:28:54,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:28:54,375 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-26 21:28:54,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:54,415 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:28:54,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:28:54,416 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-26 21:28:54,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:54,416 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:28:54,416 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:28:54,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:28:54,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:28:54,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:28:54,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:28:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-26 21:28:54,420 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-26 21:28:54,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:54,420 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-26 21:28:54,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:28:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-26 21:28:54,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:28:54,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:54,422 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-26 21:28:54,422 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:54,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:54,422 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-26 21:28:54,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:54,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:54,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:54,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:54,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:54,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:54,679 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 [2018-09-26 21:28:54,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:54,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:54,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:54,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:28:54,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:28:54,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:28:54,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:28:54,743 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-26 21:28:54,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:54,969 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-26 21:28:54,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:28:54,969 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-26 21:28:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:54,970 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:28:54,970 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:28:54,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:28:54,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:28:54,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:28:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:28:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:28:54,974 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-26 21:28:54,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:54,975 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:28:54,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:28:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:28:54,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:28:54,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:54,976 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-26 21:28:54,976 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:54,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:54,977 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-26 21:28:54,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:54,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:54,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:54,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:54,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:55,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:55,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:55,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:55,327 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:55,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:55,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:55,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:55,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:28:55,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:28:55,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:28:55,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:28:55,364 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-26 21:28:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:55,411 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:28:55,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:28:55,412 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-26 21:28:55,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:55,412 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:28:55,413 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:28:55,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:28:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:28:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-26 21:28:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:28:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-26 21:28:55,418 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-26 21:28:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:55,418 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-26 21:28:55,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:28:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-26 21:28:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:28:55,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:55,419 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-26 21:28:55,419 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:55,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:55,420 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-26 21:28:55,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:55,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:55,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:55,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:55,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:55,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:55,696 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 [2018-09-26 21:28:55,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:55,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:28:55,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:55,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:55,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:55,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:28:55,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:28:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:28:55,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:28:55,762 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-26 21:28:55,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:55,839 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-26 21:28:55,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:28:55,839 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-26 21:28:55,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:55,840 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:28:55,840 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:28:55,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:28:55,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:28:55,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:28:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:28:55,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:28:55,845 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-26 21:28:55,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:55,845 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:28:55,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:28:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:28:55,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:28:55,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:55,846 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-26 21:28:55,846 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:55,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:55,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-26 21:28:55,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:55,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:55,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:55,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:55,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:56,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:56,088 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 [2018-09-26 21:28:56,096 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:56,130 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:56,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:56,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:56,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:56,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:28:56,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:28:56,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:28:56,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:28:56,184 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-26 21:28:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:56,532 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:28:56,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:28:56,532 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-26 21:28:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:56,533 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:28:56,533 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:28:56,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:28:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:28:56,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-26 21:28:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:28:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-26 21:28:56,538 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-26 21:28:56,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:56,538 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-26 21:28:56,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:28:56,538 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-26 21:28:56,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:28:56,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:56,539 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-26 21:28:56,539 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:56,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:56,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-26 21:28:56,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:56,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:56,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:56,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:56,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:57,204 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:57,204 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:57,212 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:57,230 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:28:57,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:57,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:57,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:57,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:28:57,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:28:57,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:28:57,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:28:57,269 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-26 21:28:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:57,365 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-26 21:28:57,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:28:57,366 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-26 21:28:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:57,367 INFO L225 Difference]: With dead ends: 22 [2018-09-26 21:28:57,367 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:28:57,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:28:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:28:57,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:28:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:28:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:28:57,372 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-26 21:28:57,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:57,373 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:28:57,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:28:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:28:57,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:28:57,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:57,374 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-26 21:28:57,374 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:57,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:57,374 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-26 21:28:57,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:57,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:57,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:57,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:57,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:57,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:57,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:57,717 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:57,781 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-26 21:28:57,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:57,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:57,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:57,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:28:57,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:28:57,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:28:57,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:28:57,826 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-26 21:28:57,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:57,903 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:28:57,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:28:57,903 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-26 21:28:57,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:57,904 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:28:57,904 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:28:57,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:28:57,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:28:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-26 21:28:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:28:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-26 21:28:57,909 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-26 21:28:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:57,909 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-26 21:28:57,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:28:57,910 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-26 21:28:57,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:28:57,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:57,910 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-26 21:28:57,911 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:57,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:57,911 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-26 21:28:57,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:57,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:57,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:57,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:57,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:58,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:58,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:58,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:58,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:58,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:58,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:28:58,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:28:58,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:28:58,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:28:58,222 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-26 21:28:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:58,364 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-26 21:28:58,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:28:58,365 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-26 21:28:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:58,365 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:28:58,366 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:28:58,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:28:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:28:58,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:28:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:28:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:28:58,371 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-26 21:28:58,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:58,371 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:28:58,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:28:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:28:58,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:28:58,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:58,372 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-26 21:28:58,372 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:58,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:58,373 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-26 21:28:58,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:58,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:58,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:58,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:58,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:58,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:58,647 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 [2018-09-26 21:28:58,654 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:58,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:58,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:58,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:58,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:58,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:28:58,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:28:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:28:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:28:58,720 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-26 21:28:58,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:58,785 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:28:58,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:28:58,785 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-26 21:28:58,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:58,786 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:28:58,786 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:28:58,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:28:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:28:58,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-26 21:28:58,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:28:58,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-26 21:28:58,790 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-26 21:28:58,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:58,790 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-26 21:28:58,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:28:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-26 21:28:58,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:28:58,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:58,791 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-26 21:28:58,792 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:58,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:58,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-26 21:28:58,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:58,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:58,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:58,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:58,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:59,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:59,279 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 [2018-09-26 21:28:59,286 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:59,306 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:28:59,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:59,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:59,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:59,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:28:59,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:28:59,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:28:59,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:28:59,353 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-26 21:28:59,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:59,513 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-26 21:28:59,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:28:59,516 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-26 21:28:59,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:59,516 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:28:59,516 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:28:59,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:28:59,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:28:59,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:28:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:28:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 21:28:59,520 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-26 21:28:59,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:59,520 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 21:28:59,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:28:59,520 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 21:28:59,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:28:59,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:59,521 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-26 21:28:59,521 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:59,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:59,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-26 21:28:59,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:59,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:59,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:59,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:59,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:00,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:00,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:00,070 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:00,087 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:00,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:00,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:00,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:00,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:29:00,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:29:00,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:29:00,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:29:00,126 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-26 21:29:00,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:00,169 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:29:00,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:29:00,170 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-26 21:29:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:00,170 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:29:00,171 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:29:00,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:29:00,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:29:00,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-26 21:29:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:29:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-26 21:29:00,176 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-26 21:29:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:00,176 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-26 21:29:00,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:29:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-26 21:29:00,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:29:00,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:00,177 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-26 21:29:00,177 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:00,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:00,177 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-26 21:29:00,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:00,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:00,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:00,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:00,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:00,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:00,774 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 [2018-09-26 21:29:00,786 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:00,810 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:29:00,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:00,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:00,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:00,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:29:00,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:29:00,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:29:00,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:29:00,858 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-26 21:29:00,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:00,947 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-26 21:29:00,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:29:00,948 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-26 21:29:00,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:00,949 INFO L225 Difference]: With dead ends: 28 [2018-09-26 21:29:00,949 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:29:00,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:29:00,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:29:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:29:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:29:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 21:29:00,953 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-26 21:29:00,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:00,953 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 21:29:00,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:29:00,954 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 21:29:00,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:29:00,954 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:00,955 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-26 21:29:00,955 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:00,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:00,955 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-26 21:29:00,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:00,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:00,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:00,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:00,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:01,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:01,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:01,679 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:01,747 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:29:01,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:01,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:01,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:01,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:29:01,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:29:01,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:29:01,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:29:01,780 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-26 21:29:01,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:01,868 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:29:01,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:29:01,868 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-26 21:29:01,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:01,868 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:29:01,869 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:29:01,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:29:01,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:29:01,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-26 21:29:01,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:29:01,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-26 21:29:01,873 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-26 21:29:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:01,873 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-26 21:29:01,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:29:01,873 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-26 21:29:01,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-26 21:29:01,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:01,874 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-26 21:29:01,874 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:01,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:01,874 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-26 21:29:01,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:01,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:01,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:01,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:01,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:02,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:02,417 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 [2018-09-26 21:29:02,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:02,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:02,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:02,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:29:02,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:29:02,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:29:02,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:29:02,474 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-26 21:29:02,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:02,518 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-26 21:29:02,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:29:02,519 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-26 21:29:02,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:02,519 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:29:02,520 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:29:02,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:29:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:29:02,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:29:02,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:29:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-26 21:29:02,524 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-26 21:29:02,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:02,525 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-26 21:29:02,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:29:02,525 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-26 21:29:02,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:29:02,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:02,526 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-26 21:29:02,526 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:02,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:02,526 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-26 21:29:02,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:02,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:02,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:02,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:02,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:03,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:03,638 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 [2018-09-26 21:29:03,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:03,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:03,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:03,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:03,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:03,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:29:03,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:29:03,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:29:03,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:29:03,700 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-26 21:29:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:03,799 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 21:29:03,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:29:03,799 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-26 21:29:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:03,800 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:29:03,800 INFO L226 Difference]: Without dead ends: 30 [2018-09-26 21:29:03,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:29:03,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-26 21:29:03,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-26 21:29:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:29:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-26 21:29:03,804 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-26 21:29:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:03,804 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-26 21:29:03,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:29:03,804 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-26 21:29:03,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:29:03,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:03,805 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-26 21:29:03,805 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:03,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:03,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-26 21:29:03,806 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:03,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:03,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:03,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:03,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:04,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:04,676 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 [2018-09-26 21:29:04,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:04,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:29:04,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:04,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:04,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:04,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:29:04,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:29:04,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:29:04,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:29:04,754 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-26 21:29:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:04,992 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-26 21:29:04,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:29:04,993 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-26 21:29:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:04,993 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:29:04,993 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:29:04,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:29:04,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:29:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:29:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:29:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 21:29:04,997 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-26 21:29:04,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:04,998 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 21:29:04,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:29:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 21:29:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:29:04,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:04,999 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-26 21:29:04,999 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:04,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:04,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-26 21:29:04,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:04,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:05,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:05,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:05,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:05,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:05,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:05,384 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:05,402 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:05,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:05,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:05,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:05,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:29:05,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:29:05,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:29:05,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:29:05,436 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-26 21:29:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:05,484 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:29:05,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:29:05,485 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-26 21:29:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:05,485 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:29:05,486 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:29:05,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:29:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:29:05,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-26 21:29:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:29:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-26 21:29:05,491 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-26 21:29:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:05,491 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-26 21:29:05,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:29:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-26 21:29:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-26 21:29:05,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:05,492 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-26 21:29:05,492 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:05,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:05,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-26 21:29:05,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:05,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:05,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:05,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:05,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:06,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:06,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:06,199 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:06,225 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:29:06,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:06,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:06,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:06,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:29:06,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:29:06,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:29:06,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:29:06,259 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-26 21:29:06,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:06,354 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-26 21:29:06,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:29:06,355 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-26 21:29:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:06,355 INFO L225 Difference]: With dead ends: 34 [2018-09-26 21:29:06,356 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:29:06,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:29:06,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:29:06,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:29:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:29:06,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-26 21:29:06,361 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-26 21:29:06,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:06,361 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-26 21:29:06,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:29:06,361 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-26 21:29:06,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:29:06,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:06,362 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-26 21:29:06,363 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:06,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:06,363 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-26 21:29:06,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:06,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:06,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:06,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:06,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:07,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:07,049 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 [2018-09-26 21:29:07,059 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:07,083 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-26 21:29:07,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:07,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:07,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:07,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:29:07,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:29:07,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:29:07,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:29:07,127 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-26 21:29:07,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:07,191 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 21:29:07,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:29:07,192 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-26 21:29:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:07,192 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:29:07,193 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:29:07,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:29:07,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:29:07,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-26 21:29:07,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:29:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-26 21:29:07,198 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-26 21:29:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:07,198 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-26 21:29:07,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:29:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-26 21:29:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-26 21:29:07,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:07,199 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-26 21:29:07,199 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:07,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:07,200 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-26 21:29:07,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:07,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:07,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:07,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:07,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:07,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:07,817 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 [2018-09-26 21:29:07,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:07,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:07,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:07,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:29:07,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:29:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:29:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:29:07,887 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-26 21:29:08,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:08,155 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-26 21:29:08,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:29:08,156 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-26 21:29:08,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:08,156 INFO L225 Difference]: With dead ends: 36 [2018-09-26 21:29:08,156 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:29:08,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:29:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:29:08,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:29:08,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:29:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-26 21:29:08,161 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-26 21:29:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:08,161 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-26 21:29:08,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:29:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-26 21:29:08,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:29:08,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:08,162 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-26 21:29:08,162 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:08,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:08,162 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-26 21:29:08,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:08,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:08,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:08,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:08,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:08,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:08,729 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 [2018-09-26 21:29:08,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:08,756 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:08,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:08,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:08,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:08,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:29:08,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:29:08,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:29:08,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:29:08,797 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-26 21:29:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:08,845 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:29:08,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:29:08,846 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-26 21:29:08,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:08,846 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:29:08,846 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:29:08,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:29:08,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 21:29:08,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-26 21:29:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:29:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-26 21:29:08,851 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-26 21:29:08,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:08,852 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-26 21:29:08,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:29:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-26 21:29:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-26 21:29:08,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:08,852 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-26 21:29:08,853 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:08,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:08,853 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-26 21:29:08,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:08,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:08,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:08,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:08,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:09,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:09,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:09,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:09,761 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:29:09,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:09,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:09,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:09,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:29:09,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:29:09,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:29:09,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:29:09,796 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-26 21:29:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:09,852 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-26 21:29:09,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:29:09,852 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-26 21:29:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:09,853 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:29:09,853 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:29:09,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:29:09,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:29:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:29:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:29:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-26 21:29:09,857 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-26 21:29:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:09,858 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-26 21:29:09,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:29:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-26 21:29:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:29:09,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:09,859 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-26 21:29:09,859 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:09,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:09,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-26 21:29:09,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:09,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:09,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:09,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:09,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:10,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:10,979 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 [2018-09-26 21:29:10,987 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:11,009 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:11,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:11,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:11,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:11,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:29:11,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:29:11,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:29:11,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:29:11,040 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-26 21:29:11,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:11,093 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-26 21:29:11,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:29:11,094 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-26 21:29:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:11,095 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:29:11,095 INFO L226 Difference]: Without dead ends: 38 [2018-09-26 21:29:11,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:29:11,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-26 21:29:11,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-26 21:29:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-26 21:29:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-26 21:29:11,098 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-26 21:29:11,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:11,099 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-26 21:29:11,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:29:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-26 21:29:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-26 21:29:11,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:11,099 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-26 21:29:11,099 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:11,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:11,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-26 21:29:11,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:11,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:11,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:11,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:11,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:11,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:11,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:11,882 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:11,909 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:29:11,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:11,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:11,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:11,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:29:11,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:29:11,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:29:11,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:29:11,942 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-26 21:29:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:12,017 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-26 21:29:12,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:29:12,017 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-26 21:29:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:12,018 INFO L225 Difference]: With dead ends: 40 [2018-09-26 21:29:12,018 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:29:12,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:29:12,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:29:12,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:29:12,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:29:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-26 21:29:12,023 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-26 21:29:12,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:12,023 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-26 21:29:12,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:29:12,023 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-26 21:29:12,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:29:12,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:12,024 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-26 21:29:12,024 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:12,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:12,025 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-26 21:29:12,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:12,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:12,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:12,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:12,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:12,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:12,601 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 [2018-09-26 21:29:12,609 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:12,639 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:29:12,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:12,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:12,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:12,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:29:12,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:29:12,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:29:12,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:29:12,684 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-26 21:29:13,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:13,188 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:29:13,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:29:13,189 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-26 21:29:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:13,189 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:29:13,189 INFO L226 Difference]: Without dead ends: 40 [2018-09-26 21:29:13,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:29:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-26 21:29:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-26 21:29:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:29:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-26 21:29:13,192 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-26 21:29:13,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:13,192 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-26 21:29:13,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:29:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-26 21:29:13,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-26 21:29:13,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:13,193 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-26 21:29:13,193 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:13,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:13,193 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-26 21:29:13,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:13,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:13,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:13,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:13,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:13,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:13,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:13,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:13,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:13,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:13,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:29:13,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:29:13,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:29:13,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:29:13,875 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-26 21:29:13,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:13,938 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-26 21:29:13,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:29:13,939 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-26 21:29:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:13,939 INFO L225 Difference]: With dead ends: 42 [2018-09-26 21:29:13,940 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:29:13,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:29:13,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:29:13,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:29:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:29:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-26 21:29:13,943 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-26 21:29:13,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:13,943 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-26 21:29:13,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:29:13,943 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-26 21:29:13,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:29:13,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:13,944 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-26 21:29:13,944 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:13,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:13,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-26 21:29:13,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:13,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:13,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:13,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:13,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:14,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:14,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:14,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:14,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:14,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:14,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:15,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:15,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:29:15,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:29:15,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:29:15,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:29:15,020 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-26 21:29:15,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:15,089 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-26 21:29:15,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:29:15,089 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-26 21:29:15,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:15,090 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:29:15,090 INFO L226 Difference]: Without dead ends: 42 [2018-09-26 21:29:15,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:29:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-26 21:29:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-26 21:29:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-26 21:29:15,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-26 21:29:15,093 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-26 21:29:15,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:15,094 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-26 21:29:15,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:29:15,094 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-26 21:29:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-26 21:29:15,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:15,097 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-26 21:29:15,097 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:15,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:15,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-26 21:29:15,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:15,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:15,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:15,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:15,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:15,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:15,872 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 [2018-09-26 21:29:15,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:15,911 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:29:15,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:15,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:15,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:15,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:29:15,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:29:15,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:29:15,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:29:15,947 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-26 21:29:16,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:16,020 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-26 21:29:16,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:29:16,021 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-26 21:29:16,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:16,021 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:29:16,022 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:29:16,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:29:16,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:29:16,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:29:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:29:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-26 21:29:16,026 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-26 21:29:16,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:16,026 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-26 21:29:16,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:29:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-26 21:29:16,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:29:16,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:16,027 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-26 21:29:16,028 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:16,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:16,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-26 21:29:16,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:16,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:16,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:16,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:16,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:16,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:16,964 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 [2018-09-26 21:29:16,971 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:16,997 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:16,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:16,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:17,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:17,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:29:17,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:29:17,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:29:17,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:29:17,032 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-26 21:29:17,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:17,111 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:29:17,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:29:17,112 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-26 21:29:17,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:17,112 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:29:17,113 INFO L226 Difference]: Without dead ends: 44 [2018-09-26 21:29:17,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:29:17,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-26 21:29:17,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-26 21:29:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-26 21:29:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-26 21:29:17,116 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-26 21:29:17,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:17,116 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-26 21:29:17,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:29:17,116 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-26 21:29:17,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-26 21:29:17,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:17,117 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-26 21:29:17,117 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:17,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-26 21:29:17,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:17,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:17,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:17,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:17,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:17,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:17,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:17,843 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:17,881 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:29:17,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:17,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:17,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:17,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:29:17,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:29:17,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:29:17,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:29:17,917 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-26 21:29:17,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:17,981 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-26 21:29:17,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:29:17,981 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-26 21:29:17,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:17,982 INFO L225 Difference]: With dead ends: 46 [2018-09-26 21:29:17,982 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:29:17,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:29:17,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:29:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:29:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:29:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-26 21:29:17,986 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-26 21:29:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:17,986 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-26 21:29:17,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:29:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-26 21:29:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:29:17,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:17,987 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-26 21:29:17,987 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:17,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:17,987 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-26 21:29:17,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:17,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:17,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:17,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:17,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:18,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:18,826 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 [2018-09-26 21:29:18,833 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:18,870 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-26 21:29:18,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:18,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:18,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:18,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:29:18,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:29:18,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:29:18,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:29:18,910 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-26 21:29:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:18,980 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-26 21:29:18,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:29:18,981 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-26 21:29:18,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:18,981 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:29:18,982 INFO L226 Difference]: Without dead ends: 46 [2018-09-26 21:29:18,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:29:18,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-26 21:29:18,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-26 21:29:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-26 21:29:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-26 21:29:18,985 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-26 21:29:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:18,985 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-26 21:29:18,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:29:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-26 21:29:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-26 21:29:18,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:18,986 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-26 21:29:18,986 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:18,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:18,986 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-26 21:29:18,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:18,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:18,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:18,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:18,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:20,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:20,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:20,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:20,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:20,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:20,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:29:20,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:29:20,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:29:20,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:29:20,206 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-26 21:29:20,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:20,273 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-26 21:29:20,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:29:20,274 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-26 21:29:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:20,275 INFO L225 Difference]: With dead ends: 48 [2018-09-26 21:29:20,275 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:29:20,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:29:20,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:29:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:29:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:29:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-26 21:29:20,279 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-26 21:29:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:20,279 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-26 21:29:20,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:29:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-26 21:29:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:29:20,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:20,279 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-26 21:29:20,280 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:20,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:20,280 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-26 21:29:20,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:20,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:20,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:20,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:20,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:21,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:21,324 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 [2018-09-26 21:29:21,332 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:21,358 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:21,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:21,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:21,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:21,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:29:21,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:29:21,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:29:21,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:29:21,392 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-26 21:29:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:21,447 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-26 21:29:21,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:29:21,447 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-26 21:29:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:21,448 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:29:21,448 INFO L226 Difference]: Without dead ends: 48 [2018-09-26 21:29:21,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:29:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-26 21:29:21,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-26 21:29:21,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-26 21:29:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-26 21:29:21,451 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-26 21:29:21,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:21,452 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-26 21:29:21,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:29:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-26 21:29:21,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-26 21:29:21,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:21,452 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-26 21:29:21,453 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:21,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:21,453 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-26 21:29:21,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:21,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:21,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:21,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:21,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:22,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:22,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:22,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:22,423 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:29:22,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:22,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:22,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:22,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:29:22,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:29:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:29:22,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:29:22,463 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-26 21:29:22,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:22,844 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-26 21:29:22,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:29:22,845 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-26 21:29:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:22,845 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:29:22,846 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:29:22,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:29:22,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:29:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:29:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:29:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-26 21:29:22,851 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-26 21:29:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:22,852 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-26 21:29:22,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:29:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-26 21:29:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:29:22,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:22,852 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-26 21:29:22,853 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:22,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:22,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-26 21:29:22,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:22,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:22,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:22,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:22,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:23,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:23,924 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 [2018-09-26 21:29:23,936 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:23,965 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:23,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:23,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:24,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:24,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:29:24,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:29:24,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:29:24,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:29:24,010 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-26 21:29:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:24,117 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-26 21:29:24,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:29:24,117 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-26 21:29:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:24,118 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:29:24,118 INFO L226 Difference]: Without dead ends: 50 [2018-09-26 21:29:24,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:29:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-26 21:29:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-26 21:29:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-26 21:29:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-26 21:29:24,121 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-26 21:29:24,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:24,122 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-26 21:29:24,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:29:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-26 21:29:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-26 21:29:24,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:24,123 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-26 21:29:24,123 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:24,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:24,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-26 21:29:24,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:24,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:24,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:24,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:24,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:25,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:25,567 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 [2018-09-26 21:29:25,574 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:25,613 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:29:25,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:25,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:25,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:25,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:29:25,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:29:25,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:29:25,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:29:25,660 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-26 21:29:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:25,739 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-26 21:29:25,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:29:25,739 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-26 21:29:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:25,740 INFO L225 Difference]: With dead ends: 52 [2018-09-26 21:29:25,740 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:29:25,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:29:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:29:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:29:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:29:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-26 21:29:25,744 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-26 21:29:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:25,745 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-26 21:29:25,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:29:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-26 21:29:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:29:25,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:25,745 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-26 21:29:25,746 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:25,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:25,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-26 21:29:25,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:25,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:25,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:25,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:25,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:26,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:26,764 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 [2018-09-26 21:29:26,772 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:26,806 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:29:26,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:26,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:26,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:26,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:29:26,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:29:26,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:29:26,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:29:26,846 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-26 21:29:26,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:26,907 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-26 21:29:26,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:29:26,907 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-26 21:29:26,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:26,908 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:29:26,909 INFO L226 Difference]: Without dead ends: 52 [2018-09-26 21:29:26,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:29:26,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-26 21:29:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-26 21:29:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-26 21:29:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-26 21:29:26,912 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-26 21:29:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:26,913 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-26 21:29:26,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:29:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-26 21:29:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-26 21:29:26,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:26,913 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-26 21:29:26,914 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:26,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:26,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-26 21:29:26,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:26,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:26,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:26,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:26,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:28,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:28,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:28,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:28,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:28,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:28,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:29:28,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:29:28,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:29:28,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:29:28,578 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-26 21:29:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:28,648 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-26 21:29:28,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:29:28,648 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-26 21:29:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:28,649 INFO L225 Difference]: With dead ends: 54 [2018-09-26 21:29:28,649 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:29:28,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:29:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:29:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:29:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:29:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-26 21:29:28,653 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-26 21:29:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:28,654 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-26 21:29:28,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:29:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-26 21:29:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:29:28,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:28,654 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-26 21:29:28,655 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:28,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:28,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-26 21:29:28,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:28,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:28,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:28,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:28,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:29,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:29,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:29,745 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:29,779 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:29,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:29,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:29,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:29,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:29:29,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:29:29,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:29:29,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:29:29,824 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-26 21:29:29,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:29,973 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-26 21:29:29,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:29:29,973 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-26 21:29:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:29,974 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:29:29,975 INFO L226 Difference]: Without dead ends: 54 [2018-09-26 21:29:29,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:29:29,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-26 21:29:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-26 21:29:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-26 21:29:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-26 21:29:29,978 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-26 21:29:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:29,978 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-26 21:29:29,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:29:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-26 21:29:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:29:29,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:29,979 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-26 21:29:29,979 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:29,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:29,979 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-26 21:29:29,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:29,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:29,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:29,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:29,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:31,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:31,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:31,265 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:31,306 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-26 21:29:31,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:31,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:31,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:31,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:29:31,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:29:31,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:29:31,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:29:31,341 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-26 21:29:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:31,459 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-26 21:29:31,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:29:31,460 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-26 21:29:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:31,461 INFO L225 Difference]: With dead ends: 56 [2018-09-26 21:29:31,461 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:29:31,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:29:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:29:31,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:29:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:29:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-26 21:29:31,464 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-26 21:29:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:31,464 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-26 21:29:31,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:29:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-26 21:29:31,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:29:31,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:31,465 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-26 21:29:31,465 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:31,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:31,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-26 21:29:31,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:31,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:31,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:31,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:31,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:32,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:32,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:32,570 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:32,602 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:32,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:32,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:32,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:32,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:29:32,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:29:32,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:29:32,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:29:32,637 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-26 21:29:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:32,700 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-26 21:29:32,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:29:32,701 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-26 21:29:32,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:32,702 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:29:32,702 INFO L226 Difference]: Without dead ends: 56 [2018-09-26 21:29:32,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:29:32,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-26 21:29:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-26 21:29:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:29:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-26 21:29:32,706 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-26 21:29:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:32,706 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-26 21:29:32,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:29:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-26 21:29:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-26 21:29:32,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:32,707 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-26 21:29:32,707 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:32,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:32,707 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-26 21:29:32,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:32,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:32,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:32,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:32,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:33,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:33,849 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 [2018-09-26 21:29:33,857 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:33,904 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-26 21:29:33,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:33,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:33,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:33,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:29:33,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:29:33,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:29:33,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:29:33,953 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-26 21:29:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:34,236 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-26 21:29:34,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:29:34,237 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-26 21:29:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:34,237 INFO L225 Difference]: With dead ends: 58 [2018-09-26 21:29:34,238 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:29:34,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:29:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:29:34,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:29:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:29:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-26 21:29:34,241 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-26 21:29:34,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:34,242 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-26 21:29:34,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:29:34,242 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-26 21:29:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:29:34,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:34,243 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-26 21:29:34,243 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:34,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:34,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-26 21:29:34,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:34,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:34,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:34,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:34,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:35,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:35,718 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 [2018-09-26 21:29:35,724 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:35,767 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-26 21:29:35,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:35,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:35,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:35,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:29:35,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:29:35,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:29:35,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:29:35,814 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-26 21:29:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:35,923 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-26 21:29:35,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:29:35,923 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-26 21:29:35,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:35,924 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:29:35,924 INFO L226 Difference]: Without dead ends: 58 [2018-09-26 21:29:35,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:29:35,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-26 21:29:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-26 21:29:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-26 21:29:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-26 21:29:35,928 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-26 21:29:35,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:35,928 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-26 21:29:35,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:29:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-26 21:29:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-26 21:29:35,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:35,928 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-26 21:29:35,929 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:35,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:35,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-26 21:29:35,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:35,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:35,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:35,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:35,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:37,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:37,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:37,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:37,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:37,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:37,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:29:37,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:29:37,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:29:37,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:29:37,309 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-26 21:29:37,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:37,409 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-26 21:29:37,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:29:37,410 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-26 21:29:37,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:37,410 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:29:37,410 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:29:37,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:29:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:29:37,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:29:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:29:37,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-26 21:29:37,414 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-26 21:29:37,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:37,415 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-26 21:29:37,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:29:37,415 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-26 21:29:37,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:29:37,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:37,415 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-26 21:29:37,416 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:37,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:37,416 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-26 21:29:37,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:37,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:37,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:37,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:37,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:39,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:39,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:39,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:39,262 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:39,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:39,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:39,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:39,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:29:39,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:29:39,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:29:39,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:29:39,296 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-26 21:29:39,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:39,365 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-26 21:29:39,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:29:39,366 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-26 21:29:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:39,367 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:29:39,367 INFO L226 Difference]: Without dead ends: 60 [2018-09-26 21:29:39,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:29:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-26 21:29:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-26 21:29:39,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-26 21:29:39,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-26 21:29:39,371 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-26 21:29:39,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:39,371 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-26 21:29:39,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:29:39,371 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-26 21:29:39,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-26 21:29:39,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:39,372 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-26 21:29:39,372 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:39,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:39,373 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-26 21:29:39,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:39,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:39,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:39,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:39,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:41,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:41,069 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 [2018-09-26 21:29:41,076 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:41,144 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-26 21:29:41,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:41,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:41,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:41,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:29:41,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:29:41,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:29:41,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:29:41,190 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-26 21:29:41,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:41,366 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-26 21:29:41,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:29:41,367 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-26 21:29:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:41,368 INFO L225 Difference]: With dead ends: 62 [2018-09-26 21:29:41,368 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:29:41,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:29:41,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:29:41,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:29:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:29:41,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-26 21:29:41,372 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-26 21:29:41,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:41,372 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-26 21:29:41,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:29:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-26 21:29:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:29:41,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:41,373 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-26 21:29:41,373 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:41,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:41,374 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-26 21:29:41,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:41,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:41,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:41,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:41,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:43,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:43,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:43,188 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:43,224 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:43,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:43,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:43,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:43,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:29:43,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:29:43,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:29:43,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:29:43,271 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-26 21:29:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:43,378 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-26 21:29:43,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:29:43,378 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-26 21:29:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:43,379 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:29:43,379 INFO L226 Difference]: Without dead ends: 62 [2018-09-26 21:29:43,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:29:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-26 21:29:43,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-26 21:29:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-26 21:29:43,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-26 21:29:43,383 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-26 21:29:43,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:43,383 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-26 21:29:43,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:29:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-26 21:29:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-26 21:29:43,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:43,384 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-09-26 21:29:43,384 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:43,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:43,384 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-09-26 21:29:43,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:43,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:43,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:43,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:43,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:45,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:45,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:45,305 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:45,356 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-26 21:29:45,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:45,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:45,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:45,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-26 21:29:45,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:29:45,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:29:45,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:29:45,401 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-26 21:29:45,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:45,497 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-26 21:29:45,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:29:45,498 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-26 21:29:45,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:45,498 INFO L225 Difference]: With dead ends: 64 [2018-09-26 21:29:45,499 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:29:45,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:29:45,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:29:45,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-26 21:29:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:29:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-26 21:29:45,502 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-26 21:29:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:45,502 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-26 21:29:45,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:29:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-26 21:29:45,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:29:45,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:45,503 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-09-26 21:29:45,503 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:45,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:45,503 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-09-26 21:29:45,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:45,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:45,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:45,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:45,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:47,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:47,003 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 [2018-09-26 21:29:47,012 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:47,063 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:29:47,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:47,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:47,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:47,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:29:47,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:29:47,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:29:47,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:29:47,105 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-26 21:29:47,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:47,185 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-26 21:29:47,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:29:47,186 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-26 21:29:47,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:47,186 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:29:47,186 INFO L226 Difference]: Without dead ends: 64 [2018-09-26 21:29:47,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:29:47,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-26 21:29:47,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-26 21:29:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-26 21:29:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-26 21:29:47,190 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-26 21:29:47,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:47,190 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-26 21:29:47,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:29:47,190 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-26 21:29:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-26 21:29:47,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:47,190 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-09-26 21:29:47,191 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:47,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:47,191 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-09-26 21:29:47,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:47,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:47,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:47,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:47,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:48,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:48,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:48,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:49,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:49,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:49,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-26 21:29:49,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:29:49,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:29:49,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:29:49,078 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-26 21:29:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:49,206 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-26 21:29:49,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:29:49,206 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-26 21:29:49,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:49,207 INFO L225 Difference]: With dead ends: 66 [2018-09-26 21:29:49,207 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:29:49,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:29:49,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:29:49,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:29:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:29:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-26 21:29:49,210 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-26 21:29:49,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:49,211 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-26 21:29:49,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:29:49,211 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-26 21:29:49,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:29:49,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:49,211 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-09-26 21:29:49,211 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:49,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:49,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-09-26 21:29:49,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:49,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:49,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:49,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:49,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:50,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:50,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:50,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:51,041 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:51,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:51,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:51,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:51,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:29:51,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:29:51,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:29:51,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:29:51,103 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-26 21:29:51,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:51,274 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-26 21:29:51,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:29:51,274 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-26 21:29:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:51,275 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:29:51,275 INFO L226 Difference]: Without dead ends: 66 [2018-09-26 21:29:51,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:29:51,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-26 21:29:51,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-26 21:29:51,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-26 21:29:51,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-26 21:29:51,280 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-26 21:29:51,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:51,281 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-26 21:29:51,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:29:51,281 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-26 21:29:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-26 21:29:51,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:51,282 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-09-26 21:29:51,282 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:51,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:51,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-09-26 21:29:51,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:51,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:51,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:51,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:51,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:53,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:53,535 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 [2018-09-26 21:29:53,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:53,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-26 21:29:53,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:53,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:53,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:53,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-26 21:29:53,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:29:53,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:29:53,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:29:53,640 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-26 21:29:53,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:53,771 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-26 21:29:53,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:29:53,771 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-26 21:29:53,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:53,772 INFO L225 Difference]: With dead ends: 68 [2018-09-26 21:29:53,772 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:29:53,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:29:53,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:29:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:29:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:29:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-26 21:29:53,776 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-26 21:29:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:53,777 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-26 21:29:53,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:29:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-26 21:29:53,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:29:53,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:53,777 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-09-26 21:29:53,778 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:53,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:53,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-09-26 21:29:53,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:53,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:53,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:53,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:53,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:55,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:55,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:55,621 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:55,676 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:55,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:55,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:55,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:55,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:29:55,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:29:55,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:29:55,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:29:55,727 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-26 21:29:55,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:55,887 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-26 21:29:55,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:29:55,888 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-26 21:29:55,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:55,890 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:29:55,890 INFO L226 Difference]: Without dead ends: 68 [2018-09-26 21:29:55,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:29:55,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-26 21:29:55,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-26 21:29:55,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-26 21:29:55,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-26 21:29:55,897 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-26 21:29:55,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:55,898 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-26 21:29:55,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:29:55,898 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-26 21:29:55,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-26 21:29:55,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:55,899 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-09-26 21:29:55,899 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:55,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:55,899 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-09-26 21:29:55,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:55,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:55,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:55,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:55,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:57,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:57,573 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 [2018-09-26 21:29:57,581 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:57,637 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-26 21:29:57,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:57,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:57,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:57,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-26 21:29:57,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:29:57,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:29:57,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:29:57,676 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-26 21:29:57,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:57,790 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-26 21:29:57,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:29:57,790 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-26 21:29:57,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:57,792 INFO L225 Difference]: With dead ends: 70 [2018-09-26 21:29:57,792 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:29:57,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:29:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:29:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:29:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:29:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-26 21:29:57,795 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-26 21:29:57,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:57,796 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-26 21:29:57,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:29:57,796 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-26 21:29:57,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:29:57,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:57,796 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-09-26 21:29:57,797 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:57,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:57,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-09-26 21:29:57,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:57,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:57,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:57,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:57,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:59,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:59,401 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 [2018-09-26 21:29:59,415 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:59,534 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-26 21:29:59,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:59,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:59,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:59,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:29:59,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:29:59,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:29:59,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:29:59,584 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-26 21:29:59,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:59,773 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-26 21:29:59,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:29:59,774 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-26 21:29:59,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:59,775 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:29:59,775 INFO L226 Difference]: Without dead ends: 70 [2018-09-26 21:29:59,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:29:59,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-26 21:29:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-26 21:29:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-26 21:29:59,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-26 21:29:59,778 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-26 21:29:59,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:59,778 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-26 21:29:59,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:29:59,778 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-26 21:29:59,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-26 21:29:59,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:59,779 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-09-26 21:29:59,779 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:59,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:59,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-09-26 21:29:59,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:59,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:59,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:59,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:59,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:01,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:01,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:01,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:01,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:02,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:02,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-26 21:30:02,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:30:02,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:30:02,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:30:02,021 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-26 21:30:02,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:02,195 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-26 21:30:02,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:30:02,195 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-26 21:30:02,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:02,196 INFO L225 Difference]: With dead ends: 72 [2018-09-26 21:30:02,196 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:30:02,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:30:02,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:30:02,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-26 21:30:02,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:30:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-26 21:30:02,199 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-26 21:30:02,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:02,200 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-26 21:30:02,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:30:02,200 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-26 21:30:02,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:30:02,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:02,200 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-09-26 21:30:02,200 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:02,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:02,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-09-26 21:30:02,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:02,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:02,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:02,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:02,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:03,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:03,935 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 [2018-09-26 21:30:03,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:03,984 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:03,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:03,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:04,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:04,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:30:04,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:30:04,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:30:04,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:30:04,021 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-26 21:30:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:04,115 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-26 21:30:04,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:30:04,116 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-26 21:30:04,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:04,117 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:30:04,117 INFO L226 Difference]: Without dead ends: 72 [2018-09-26 21:30:04,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:30:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-26 21:30:04,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-26 21:30:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-26 21:30:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-26 21:30:04,120 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-26 21:30:04,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:04,121 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-26 21:30:04,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:30:04,121 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-26 21:30:04,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-26 21:30:04,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:04,121 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-09-26 21:30:04,122 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:04,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:04,122 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-09-26 21:30:04,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:04,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:04,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:04,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:04,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:06,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:06,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:06,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:06,348 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-26 21:30:06,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:06,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:06,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:06,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-26 21:30:06,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:30:06,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:30:06,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:30:06,386 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-26 21:30:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:06,571 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-26 21:30:06,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:30:06,571 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-26 21:30:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:06,572 INFO L225 Difference]: With dead ends: 74 [2018-09-26 21:30:06,572 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:30:06,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:30:06,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:30:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:30:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:30:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-26 21:30:06,576 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-26 21:30:06,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:06,576 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-26 21:30:06,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:30:06,577 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-26 21:30:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:30:06,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:06,577 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-09-26 21:30:06,577 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:06,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:06,578 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-09-26 21:30:06,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:06,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:06,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:06,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:06,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:08,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:08,400 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 [2018-09-26 21:30:08,409 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:08,458 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:08,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:08,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:08,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:08,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:30:08,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-26 21:30:08,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-26 21:30:08,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:30:08,516 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-26 21:30:10,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:10,215 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-26 21:30:10,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:30:10,216 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-26 21:30:10,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:10,217 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:30:10,217 INFO L226 Difference]: Without dead ends: 74 [2018-09-26 21:30:10,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:30:10,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-26 21:30:10,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-26 21:30:10,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-26 21:30:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-26 21:30:10,221 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-26 21:30:10,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:10,221 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-26 21:30:10,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-26 21:30:10,221 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-26 21:30:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-26 21:30:10,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:10,222 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-09-26 21:30:10,222 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:10,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:10,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-09-26 21:30:10,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:10,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:10,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:10,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:10,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:12,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:12,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:12,682 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:12,749 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-26 21:30:12,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:12,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:12,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:12,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-26 21:30:12,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:30:12,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:30:12,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:30:12,799 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-26 21:30:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:13,067 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-26 21:30:13,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:30:13,067 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-26 21:30:13,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:13,068 INFO L225 Difference]: With dead ends: 76 [2018-09-26 21:30:13,068 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:30:13,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:30:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:30:13,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-26 21:30:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:30:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-26 21:30:13,073 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-26 21:30:13,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:13,073 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-26 21:30:13,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:30:13,073 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-26 21:30:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:30:13,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:13,074 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-09-26 21:30:13,074 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:13,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:13,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-09-26 21:30:13,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:13,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:13,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:13,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:13,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:15,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:15,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:15,232 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:15,339 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:30:15,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:15,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:15,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:15,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:30:15,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:30:15,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:30:15,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:30:15,392 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-26 21:30:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:15,723 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-26 21:30:15,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:30:15,723 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-26 21:30:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:15,724 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:30:15,724 INFO L226 Difference]: Without dead ends: 76 [2018-09-26 21:30:15,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:30:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-26 21:30:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-26 21:30:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-26 21:30:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-26 21:30:15,729 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-26 21:30:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:15,729 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-26 21:30:15,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-26 21:30:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-26 21:30:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-26 21:30:15,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:15,730 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-09-26 21:30:15,730 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:15,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:15,730 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-09-26 21:30:15,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:15,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:15,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:15,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:15,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:17,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:17,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:17,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:17,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:17,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:17,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-26 21:30:17,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:30:17,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:30:17,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:30:17,973 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-26 21:30:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:18,120 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-26 21:30:18,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:30:18,120 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-26 21:30:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:18,121 INFO L225 Difference]: With dead ends: 78 [2018-09-26 21:30:18,122 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:30:18,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:30:18,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:30:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:30:18,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:30:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-26 21:30:18,125 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-26 21:30:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:18,125 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-26 21:30:18,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:30:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-26 21:30:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:30:18,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:18,126 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-09-26 21:30:18,126 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:18,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:18,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-09-26 21:30:18,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:18,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:18,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:18,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:18,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:20,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:20,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:20,204 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:20,247 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:20,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:20,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:20,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:20,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:30:20,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:30:20,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:30:20,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:30:20,294 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-26 21:30:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:20,496 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-26 21:30:20,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:30:20,496 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-26 21:30:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:20,497 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:30:20,497 INFO L226 Difference]: Without dead ends: 78 [2018-09-26 21:30:20,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:30:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-26 21:30:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-26 21:30:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-26 21:30:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-26 21:30:20,501 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-26 21:30:20,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:20,501 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-26 21:30:20,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:30:20,501 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-26 21:30:20,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-26 21:30:20,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:20,502 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-09-26 21:30:20,502 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:20,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:20,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-09-26 21:30:20,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:20,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:20,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:20,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:20,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:22,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:22,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:22,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:23,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-26 21:30:23,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:23,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:23,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:23,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-26 21:30:23,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:30:23,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:30:23,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:30:23,092 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-26 21:30:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:23,203 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-26 21:30:23,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:30:23,204 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-26 21:30:23,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:23,204 INFO L225 Difference]: With dead ends: 80 [2018-09-26 21:30:23,205 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:30:23,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:30:23,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:30:23,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-26 21:30:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:30:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-26 21:30:23,208 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-26 21:30:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:23,208 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-26 21:30:23,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:30:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-26 21:30:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:30:23,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:23,209 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-09-26 21:30:23,209 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:23,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:23,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-09-26 21:30:23,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:23,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:23,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:23,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:23,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:25,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:25,283 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 [2018-09-26 21:30:25,289 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:25,332 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:25,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:25,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:25,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:25,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-26 21:30:25,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-26 21:30:25,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-26 21:30:25,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:30:25,372 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-26 21:30:26,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:26,257 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-26 21:30:26,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:30:26,257 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-26 21:30:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:26,258 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:30:26,258 INFO L226 Difference]: Without dead ends: 80 [2018-09-26 21:30:26,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:30:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-26 21:30:26,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-26 21:30:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-26 21:30:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-26 21:30:26,261 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-26 21:30:26,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:26,262 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-26 21:30:26,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-26 21:30:26,262 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-26 21:30:26,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-26 21:30:26,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:26,263 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-09-26 21:30:26,263 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:26,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:26,263 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-09-26 21:30:26,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:26,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:26,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:26,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:26,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:28,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:28,839 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 [2018-09-26 21:30:28,847 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:28,915 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-26 21:30:28,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:28,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:28,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:28,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-26 21:30:28,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:30:28,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:30:28,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:30:28,955 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-26 21:30:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:29,176 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-26 21:30:29,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:30:29,176 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-26 21:30:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:29,176 INFO L225 Difference]: With dead ends: 82 [2018-09-26 21:30:29,177 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:30:29,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:30:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:30:29,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:30:29,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:30:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-26 21:30:29,179 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-26 21:30:29,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:29,179 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-26 21:30:29,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:30:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-26 21:30:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:30:29,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:29,180 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-09-26 21:30:29,180 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:29,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:29,181 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-09-26 21:30:29,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:29,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:29,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:29,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:29,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:31,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:31,709 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 [2018-09-26 21:30:31,716 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:31,783 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-26 21:30:31,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:31,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:31,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:31,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-26 21:30:31,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-26 21:30:31,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-26 21:30:31,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:30:31,825 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-26 21:30:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:31,985 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-26 21:30:31,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:30:31,986 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-26 21:30:31,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:31,987 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:30:31,987 INFO L226 Difference]: Without dead ends: 82 [2018-09-26 21:30:31,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:30:31,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-26 21:30:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-26 21:30:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-26 21:30:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-26 21:30:31,990 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-26 21:30:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:31,991 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-26 21:30:31,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-26 21:30:31,991 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-26 21:30:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-26 21:30:31,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:31,991 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-09-26 21:30:31,992 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:31,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:31,992 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-09-26 21:30:31,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:31,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:31,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:31,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:31,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:34,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:34,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:34,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:34,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:34,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:34,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-26 21:30:34,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:30:34,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:30:34,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:30:34,486 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-26 21:30:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:34,757 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-26 21:30:34,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:30:34,757 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-26 21:30:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:34,758 INFO L225 Difference]: With dead ends: 84 [2018-09-26 21:30:34,758 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:30:34,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:30:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:30:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:30:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:30:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-26 21:30:34,761 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-26 21:30:34,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:34,762 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-26 21:30:34,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:30:34,762 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-26 21:30:34,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:30:34,762 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:34,762 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-09-26 21:30:34,763 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:34,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:34,763 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-09-26 21:30:34,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:34,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:34,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:34,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:34,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:37,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:37,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:37,509 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:37,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:37,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:37,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:37,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:37,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-26 21:30:37,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:30:37,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:30:37,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:30:37,593 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-09-26 21:30:37,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:37,715 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-26 21:30:37,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:30:37,716 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-09-26 21:30:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:37,717 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:30:37,717 INFO L226 Difference]: Without dead ends: 84 [2018-09-26 21:30:37,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:30:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-26 21:30:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-26 21:30:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-26 21:30:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-26 21:30:37,720 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-26 21:30:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:37,721 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-26 21:30:37,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-26 21:30:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-26 21:30:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-26 21:30:37,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:37,721 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1] [2018-09-26 21:30:37,721 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:37,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:37,722 INFO L82 PathProgramCache]: Analyzing trace with hash 723579617, now seen corresponding path program 81 times [2018-09-26 21:30:37,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:37,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:37,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:37,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:37,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:40,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:40,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:40,380 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:40,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-26 21:30:40,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:40,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:40,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:40,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-26 21:30:40,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:30:40,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:30:40,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:30:40,517 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-26 21:30:40,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:40,795 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-26 21:30:40,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-26 21:30:40,795 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-26 21:30:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:40,796 INFO L225 Difference]: With dead ends: 86 [2018-09-26 21:30:40,796 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:30:40,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:30:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:30:40,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:30:40,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:30:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-26 21:30:40,800 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-26 21:30:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:40,800 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-26 21:30:40,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:30:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-26 21:30:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:30:40,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:40,801 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1] [2018-09-26 21:30:40,801 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:40,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:40,801 INFO L82 PathProgramCache]: Analyzing trace with hash 956131591, now seen corresponding path program 82 times [2018-09-26 21:30:40,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:40,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:40,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:40,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:40,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:43,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:43,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:43,643 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:43,693 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:43,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:43,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:43,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:43,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-26 21:30:43,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-26 21:30:43,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-26 21:30:43,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:30:43,736 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-09-26 21:30:43,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:43,884 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-26 21:30:43,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-26 21:30:43,884 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-09-26 21:30:43,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:43,885 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:30:43,886 INFO L226 Difference]: Without dead ends: 86 [2018-09-26 21:30:43,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:30:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-26 21:30:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-26 21:30:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-26 21:30:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-26 21:30:43,890 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-26 21:30:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:43,890 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-26 21:30:43,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-26 21:30:43,890 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-26 21:30:43,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-26 21:30:43,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:43,891 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1] [2018-09-26 21:30:43,891 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:43,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:43,892 INFO L82 PathProgramCache]: Analyzing trace with hash -424691807, now seen corresponding path program 83 times [2018-09-26 21:30:43,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:43,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:43,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:43,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:43,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:46,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:46,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:46,836 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:46,913 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-26 21:30:46,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:46,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:46,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:46,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-26 21:30:46,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:30:46,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:30:46,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:30:46,970 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-26 21:30:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:47,285 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-26 21:30:47,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:30:47,285 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-26 21:30:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:47,286 INFO L225 Difference]: With dead ends: 88 [2018-09-26 21:30:47,286 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:30:47,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:30:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:30:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-26 21:30:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:30:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-26 21:30:47,290 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-26 21:30:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:47,291 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-26 21:30:47,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:30:47,291 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-26 21:30:47,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:30:47,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:47,292 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1] [2018-09-26 21:30:47,292 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:47,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:47,292 INFO L82 PathProgramCache]: Analyzing trace with hash -280544185, now seen corresponding path program 84 times [2018-09-26 21:30:47,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:47,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:47,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:47,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:47,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:49,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:49,856 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:49,931 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-26 21:30:49,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:49,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:49,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-26 21:30:49,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-26 21:30:49,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-26 21:30:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:30:49,972 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-09-26 21:30:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:50,111 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-26 21:30:50,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-26 21:30:50,112 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-09-26 21:30:50,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:50,112 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:30:50,113 INFO L226 Difference]: Without dead ends: 88 [2018-09-26 21:30:50,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:30:50,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-26 21:30:50,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-26 21:30:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-26 21:30:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-26 21:30:50,117 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-26 21:30:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:50,118 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-26 21:30:50,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-26 21:30:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-26 21:30:50,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-26 21:30:50,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:50,119 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1] [2018-09-26 21:30:50,119 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:50,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:50,119 INFO L82 PathProgramCache]: Analyzing trace with hash -106935199, now seen corresponding path program 85 times [2018-09-26 21:30:50,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:50,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:50,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:50,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:50,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:53,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:53,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:53,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:53,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:53,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:53,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-26 21:30:53,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:30:53,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:30:53,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:30:53,164 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-26 21:30:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:53,373 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-26 21:30:53,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-26 21:30:53,374 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-26 21:30:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:53,375 INFO L225 Difference]: With dead ends: 90 [2018-09-26 21:30:53,375 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:30:53,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:30:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:30:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:30:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:30:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-26 21:30:53,379 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-26 21:30:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:53,379 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-26 21:30:53,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:30:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-26 21:30:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:30:53,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:53,380 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1] [2018-09-26 21:30:53,380 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:53,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:53,381 INFO L82 PathProgramCache]: Analyzing trace with hash 979976071, now seen corresponding path program 86 times [2018-09-26 21:30:53,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:53,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:53,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:53,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:53,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:56,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:56,268 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 [2018-09-26 21:30:56,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:56,324 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:56,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:56,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:56,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:56,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-26 21:30:56,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:30:56,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:30:56,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:30:56,366 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-09-26 21:30:56,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:56,565 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-26 21:30:56,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:30:56,566 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-09-26 21:30:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:56,566 INFO L225 Difference]: With dead ends: 91 [2018-09-26 21:30:56,567 INFO L226 Difference]: Without dead ends: 90 [2018-09-26 21:30:56,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:30:56,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-26 21:30:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-26 21:30:56,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-26 21:30:56,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-26 21:30:56,570 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-26 21:30:56,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:56,570 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-26 21:30:56,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:30:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-26 21:30:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-26 21:30:56,571 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:56,571 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1] [2018-09-26 21:30:56,571 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:56,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:56,571 INFO L82 PathProgramCache]: Analyzing trace with hash 314487073, now seen corresponding path program 87 times [2018-09-26 21:30:56,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:56,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:56,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:56,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:56,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:59,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:59,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:59,460 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:59,542 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-26 21:30:59,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:59,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:59,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:59,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-26 21:30:59,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:30:59,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:30:59,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:30:59,582 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-26 21:30:59,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:59,758 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-26 21:30:59,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-26 21:30:59,758 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-26 21:30:59,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:59,759 INFO L225 Difference]: With dead ends: 92 [2018-09-26 21:30:59,759 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:30:59,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:30:59,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:30:59,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:30:59,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:30:59,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-26 21:30:59,762 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-26 21:30:59,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:59,762 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-26 21:30:59,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:30:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-26 21:30:59,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:30:59,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:59,763 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1] [2018-09-26 21:30:59,763 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:59,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:59,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164615, now seen corresponding path program 88 times [2018-09-26 21:30:59,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:59,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:59,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:59,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:59,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:02,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:02,879 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 [2018-09-26 21:31:02,893 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:02,947 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:02,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:02,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:02,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:02,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-26 21:31:02,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-26 21:31:02,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-26 21:31:02,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:31:02,990 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-09-26 21:31:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:03,144 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-26 21:31:03,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-26 21:31:03,144 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-09-26 21:31:03,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:03,145 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:31:03,145 INFO L226 Difference]: Without dead ends: 92 [2018-09-26 21:31:03,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:31:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-26 21:31:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-26 21:31:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-26 21:31:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-26 21:31:03,149 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-26 21:31:03,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:03,149 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-26 21:31:03,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-26 21:31:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-26 21:31:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-26 21:31:03,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:03,150 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1] [2018-09-26 21:31:03,150 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:03,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:03,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364641, now seen corresponding path program 89 times [2018-09-26 21:31:03,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:03,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:03,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:03,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:06,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:06,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:06,014 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:06,095 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-26 21:31:06,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:06,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:06,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:06,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-26 21:31:06,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:31:06,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:31:06,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:31:06,146 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-26 21:31:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:06,353 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-26 21:31:06,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-26 21:31:06,353 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-26 21:31:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:06,354 INFO L225 Difference]: With dead ends: 94 [2018-09-26 21:31:06,354 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:31:06,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:31:06,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:31:06,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:31:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:31:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-26 21:31:06,358 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-26 21:31:06,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:06,358 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-26 21:31:06,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:31:06,358 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-26 21:31:06,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:31:06,358 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:06,358 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1] [2018-09-26 21:31:06,359 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:06,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:06,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663559, now seen corresponding path program 90 times [2018-09-26 21:31:06,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:06,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:06,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:06,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:06,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:09,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:09,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:09,538 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:09,702 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-26 21:31:09,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:09,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:09,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:09,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-26 21:31:09,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-26 21:31:09,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-26 21:31:09,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-26 21:31:09,763 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-09-26 21:31:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:09,951 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-26 21:31:09,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:31:09,951 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-09-26 21:31:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:09,952 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:31:09,952 INFO L226 Difference]: Without dead ends: 94 [2018-09-26 21:31:09,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-26 21:31:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-26 21:31:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-26 21:31:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-26 21:31:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-26 21:31:09,955 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-26 21:31:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:09,955 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-26 21:31:09,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-26 21:31:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-26 21:31:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-26 21:31:09,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:09,956 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1] [2018-09-26 21:31:09,956 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:09,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:09,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930017, now seen corresponding path program 91 times [2018-09-26 21:31:09,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:09,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:09,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:09,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:09,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:13,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:13,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:13,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:13,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:13,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:13,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-26 21:31:13,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:31:13,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:31:13,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:31:13,290 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-26 21:31:13,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:13,428 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-26 21:31:13,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-26 21:31:13,429 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-26 21:31:13,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:13,430 INFO L225 Difference]: With dead ends: 96 [2018-09-26 21:31:13,430 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:31:13,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:31:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:31:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-26 21:31:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:31:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-26 21:31:13,434 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-26 21:31:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:13,434 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-26 21:31:13,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:31:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-26 21:31:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:31:13,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:13,435 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1] [2018-09-26 21:31:13,435 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:13,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:13,435 INFO L82 PathProgramCache]: Analyzing trace with hash 854092103, now seen corresponding path program 92 times [2018-09-26 21:31:13,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:13,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:13,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:13,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:13,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:16,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:16,496 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 [2018-09-26 21:31:16,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:16,559 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:16,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:16,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:16,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:16,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-26 21:31:16,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-26 21:31:16,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-26 21:31:16,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:31:16,617 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-09-26 21:31:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:17,457 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-26 21:31:17,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-26 21:31:17,458 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-09-26 21:31:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:17,459 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:31:17,459 INFO L226 Difference]: Without dead ends: 96 [2018-09-26 21:31:17,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:31:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-26 21:31:17,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-26 21:31:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-26 21:31:17,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-26 21:31:17,463 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-26 21:31:17,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:17,463 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-26 21:31:17,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-26 21:31:17,463 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-26 21:31:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-26 21:31:17,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:17,464 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1] [2018-09-26 21:31:17,464 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:17,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:17,464 INFO L82 PathProgramCache]: Analyzing trace with hash 707051361, now seen corresponding path program 93 times [2018-09-26 21:31:17,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:17,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:17,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:17,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:17,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:21,238 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:21,238 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 [2018-09-26 21:31:21,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:21,340 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-26 21:31:21,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:21,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:21,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:21,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-26 21:31:21,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:31:21,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:31:21,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:31:21,394 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-26 21:31:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:21,628 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-26 21:31:21,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-26 21:31:21,628 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-26 21:31:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:21,629 INFO L225 Difference]: With dead ends: 98 [2018-09-26 21:31:21,629 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:31:21,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:31:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:31:21,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 21:31:21,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:31:21,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-26 21:31:21,633 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-26 21:31:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:21,633 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-26 21:31:21,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:31:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-26 21:31:21,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:31:21,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:21,634 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1] [2018-09-26 21:31:21,634 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:21,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:21,635 INFO L82 PathProgramCache]: Analyzing trace with hash 443755655, now seen corresponding path program 94 times [2018-09-26 21:31:21,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:21,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:21,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:21,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:21,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:25,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:25,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:25,231 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:25,288 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:25,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:25,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:25,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:25,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-26 21:31:25,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-26 21:31:25,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-26 21:31:25,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-26 21:31:25,331 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-09-26 21:31:25,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:25,567 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-26 21:31:25,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-26 21:31:25,568 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-09-26 21:31:25,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:25,569 INFO L225 Difference]: With dead ends: 99 [2018-09-26 21:31:25,569 INFO L226 Difference]: Without dead ends: 98 [2018-09-26 21:31:25,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-26 21:31:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-26 21:31:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-26 21:31:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-26 21:31:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-26 21:31:25,572 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-26 21:31:25,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:25,573 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-26 21:31:25,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-26 21:31:25,573 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-26 21:31:25,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-26 21:31:25,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:25,574 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1] [2018-09-26 21:31:25,574 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:25,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:25,574 INFO L82 PathProgramCache]: Analyzing trace with hash 871523361, now seen corresponding path program 95 times [2018-09-26 21:31:25,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:25,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:25,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:25,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:25,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:29,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:29,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:29,144 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:29,232 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-26 21:31:29,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:29,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:29,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:29,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-26 21:31:29,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:31:29,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:31:29,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:31:29,293 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-26 21:31:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:29,538 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-26 21:31:29,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-26 21:31:29,539 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-26 21:31:29,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:29,540 INFO L225 Difference]: With dead ends: 100 [2018-09-26 21:31:29,540 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:31:29,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:31:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:31:29,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-26 21:31:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:31:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-26 21:31:29,543 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-26 21:31:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:29,544 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-26 21:31:29,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:31:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-26 21:31:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:31:29,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:29,544 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1] [2018-09-26 21:31:29,545 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:29,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:29,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420359, now seen corresponding path program 96 times [2018-09-26 21:31:29,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:29,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:29,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:29,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:29,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:33,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:33,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:33,137 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:33,230 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-26 21:31:33,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:33,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:33,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:33,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-26 21:31:33,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-26 21:31:33,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-26 21:31:33,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-26 21:31:33,274 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-09-26 21:31:33,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:33,442 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-26 21:31:33,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-26 21:31:33,442 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-09-26 21:31:33,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:33,443 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:31:33,444 INFO L226 Difference]: Without dead ends: 100 [2018-09-26 21:31:33,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-26 21:31:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-26 21:31:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-26 21:31:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-26 21:31:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-26 21:31:33,448 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-26 21:31:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:33,448 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-26 21:31:33,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-26 21:31:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-26 21:31:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-26 21:31:33,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:33,449 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1] [2018-09-26 21:31:33,449 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:33,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:33,449 INFO L82 PathProgramCache]: Analyzing trace with hash 15325409, now seen corresponding path program 97 times [2018-09-26 21:31:33,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:33,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:33,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:33,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:33,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:36,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:36,806 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 [2018-09-26 21:31:36,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:36,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:36,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:36,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-26 21:31:36,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:31:36,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:31:36,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:31:36,912 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-26 21:31:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:37,069 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-26 21:31:37,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-26 21:31:37,069 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-26 21:31:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:37,070 INFO L225 Difference]: With dead ends: 102 [2018-09-26 21:31:37,070 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:31:37,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:31:37,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:31:37,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:31:37,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:31:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-26 21:31:37,074 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-26 21:31:37,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:37,074 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-26 21:31:37,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:31:37,074 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-26 21:31:37,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:31:37,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:37,075 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1] [2018-09-26 21:31:37,075 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:37,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:37,075 INFO L82 PathProgramCache]: Analyzing trace with hash 475087623, now seen corresponding path program 98 times [2018-09-26 21:31:37,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:37,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:37,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:37,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:40,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:40,845 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 [2018-09-26 21:31:40,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:40,912 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:40,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:40,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:40,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:40,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-26 21:31:40,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 21:31:40,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 21:31:40,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:31:40,954 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-09-26 21:31:41,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:41,139 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-26 21:31:41,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-26 21:31:41,140 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-09-26 21:31:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:41,141 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:31:41,141 INFO L226 Difference]: Without dead ends: 102 [2018-09-26 21:31:41,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:31:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-26 21:31:41,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-26 21:31:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-26 21:31:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-26 21:31:41,145 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-26 21:31:41,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:41,145 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-26 21:31:41,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-26 21:31:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-26 21:31:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-26 21:31:41,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:41,146 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1] [2018-09-26 21:31:41,146 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:41,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814369, now seen corresponding path program 99 times [2018-09-26 21:31:41,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:41,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:41,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:41,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:41,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:44,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:44,892 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 [2018-09-26 21:31:44,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:45,003 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-26 21:31:45,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:45,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:45,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:45,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-26 21:31:45,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:31:45,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:31:45,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:31:45,048 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-26 21:31:45,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:45,340 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-26 21:31:45,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-26 21:31:45,340 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-26 21:31:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:45,341 INFO L225 Difference]: With dead ends: 104 [2018-09-26 21:31:45,341 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:31:45,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:31:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:31:45,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-26 21:31:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:31:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-26 21:31:45,345 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-26 21:31:45,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:45,345 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-26 21:31:45,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:31:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-26 21:31:45,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:31:45,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:45,346 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1] [2018-09-26 21:31:45,346 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:45,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:45,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670535, now seen corresponding path program 100 times [2018-09-26 21:31:45,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:45,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:45,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:45,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:45,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:50,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:50,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:50,872 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:50,936 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:50,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:50,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:51,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:51,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-26 21:31:51,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-26 21:31:51,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-26 21:31:51,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:31:51,165 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-09-26 21:31:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:57,967 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-26 21:31:57,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-26 21:31:57,967 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-09-26 21:31:57,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:57,968 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:31:57,969 INFO L226 Difference]: Without dead ends: 104 [2018-09-26 21:31:57,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:31:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-26 21:31:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-26 21:31:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-26 21:31:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-26 21:31:57,975 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-26 21:31:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:57,975 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-26 21:31:57,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-26 21:31:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-26 21:31:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-26 21:31:57,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:57,976 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1] [2018-09-26 21:31:57,976 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:57,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:57,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080865, now seen corresponding path program 101 times [2018-09-26 21:31:57,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:57,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:57,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:57,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:57,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:03,309 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:32:03,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-09-26 21:32:03,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 21:32:03,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 21:32:03,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:32:03,310 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-26 21:32:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:03,553 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-26 21:32:03,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-26 21:32:03,554 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-26 21:32:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:03,554 INFO L225 Difference]: With dead ends: 104 [2018-09-26 21:32:03,554 INFO L226 Difference]: Without dead ends: 0 [2018-09-26 21:32:03,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:32:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-26 21:32:03,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-26 21:32:03,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-26 21:32:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-26 21:32:03,557 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2018-09-26 21:32:03,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:03,557 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-26 21:32:03,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 21:32:03,557 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-26 21:32:03,558 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-26 21:32:03,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-26 21:32:03,721 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 610 [2018-09-26 21:32:05,635 WARN L178 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 610 [2018-09-26 21:32:05,644 INFO L426 ceAbstractionStarter]: For program point mainENTRY(lines 17 31) no Hoare annotation was computed. [2018-09-26 21:32:05,644 INFO L426 ceAbstractionStarter]: For program point mainFINAL(lines 17 31) no Hoare annotation was computed. [2018-09-26 21:32:05,644 INFO L426 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONASSERT(line 29) no Hoare annotation was computed. [2018-09-26 21:32:05,644 INFO L426 ceAbstractionStarter]: For program point mainEXIT(lines 17 31) no Hoare annotation was computed. [2018-09-26 21:32:05,647 INFO L422 ceAbstractionStarter]: At program point L24-1(lines 24 27) the Hoare annotation is: (or (and (<= main_x 49) (<= main_y 49) (<= 49 main_x) (<= 49 main_y)) (and (<= 8 main_y) (<= main_y 8) (<= main_x 8) (<= 8 main_x)) (and (<= 99 main_x) (<= main_y 99) (<= 99 main_y) (<= main_x 99)) (and (<= 42 main_x) (<= main_y 42) (<= main_x 42) (<= 42 main_y)) (and (<= 59 main_x) (<= 59 main_y) (<= main_y 59) (<= main_x 59)) (and (<= 9 main_y) (<= 9 main_x) (<= main_x 9) (<= main_y 9)) (and (<= 55 main_y) (<= main_y 55) (<= 55 main_x) (<= main_x 55)) (and (<= 74 main_x) (<= main_x 74) (<= 74 main_y) (<= main_y 74)) (and (<= main_x 97) (<= 97 main_y) (<= main_y 97) (<= 97 main_x)) (and (<= 12 main_x) (<= 12 main_y) (<= main_y 12) (<= main_x 12)) (and (<= main_x 65) (<= main_y 65) (<= 65 main_x) (<= 65 main_y)) (and (<= 32 main_x) (<= main_x 32) (<= 32 main_y) (<= main_y 32)) (and (<= main_y 73) (<= main_x 73) (<= 73 main_x) (<= 73 main_y)) (and (<= 6 main_x) (<= main_x 6) (<= 6 main_y) (<= main_y 6)) (and (<= 14 main_x) (<= 14 main_y) (<= main_y 14) (<= main_x 14)) (and (<= main_x 0) (<= 0 main_y) (<= 0 main_x) (<= main_y 0)) (and (<= main_y 44) (<= main_x 44) (<= 44 main_y) (<= 44 main_x)) (and (<= 38 main_x) (<= 38 main_y) (<= main_y 38) (<= main_x 38)) (and (<= 43 main_x) (<= main_x 43) (<= main_y 43) (<= 43 main_y)) (and (<= 21 main_y) (<= 21 main_x) (<= main_x 21) (<= main_y 21)) (and (<= 94 main_x) (<= 94 main_y) (<= main_x 94) (<= main_y 94)) (and (<= 52 main_x) (<= 52 main_y) (<= main_y 52) (<= main_x 52)) (and (<= main_y 46) (<= 46 main_x) (<= main_x 46) (<= 46 main_y)) (and (<= main_x 18) (<= 18 main_y) (<= 18 main_x) (<= main_y 18)) (and (<= 61 main_y) (<= main_x 61) (<= main_y 61) (<= 61 main_x)) (<= 101 main_x) (and (<= 88 main_y) (<= main_y 88) (<= 88 main_x) (<= main_x 88)) (and (<= 80 main_y) (<= main_x 80) (<= main_y 80) (<= 80 main_x)) (and (<= main_x 92) (<= 92 main_y) (<= main_y 92) (<= 92 main_x)) (and (<= 87 main_x) (<= main_x 87) (<= 87 main_y) (<= main_y 87)) (and (<= 35 main_y) (<= main_y 35) (<= main_x 35) (<= 35 main_x)) (and (<= 85 main_x) (<= main_x 85) (<= 85 main_y) (<= main_y 85)) (and (<= 63 main_x) (<= 63 main_y) (<= main_y 63) (<= main_x 63)) (and (<= 15 main_y) (<= main_y 15) (<= 15 main_x) (<= main_x 15)) (and (<= main_y 64) (<= 64 main_x) (<= main_x 64) (<= 64 main_y)) (and (<= 47 main_x) (<= 47 main_y) (<= main_y 47) (<= main_x 47)) (and (<= 51 main_y) (<= main_x 51) (<= 51 main_x) (<= main_y 51)) (and (<= 4 main_y) (<= main_y 4) (<= main_x 4) (<= 4 main_x)) (and (<= 54 main_y) (<= main_y 54) (<= 54 main_x) (<= main_x 54)) (and (<= main_x 33) (<= 33 main_x) (<= main_y 33) (<= 33 main_y)) (and (<= 37 main_x) (<= 37 main_y) (<= main_y 37) (<= main_x 37)) (and (<= 20 main_y) (<= 20 main_x) (<= main_y 20) (<= main_x 20)) (and (<= 26 main_y) (<= main_x 26) (<= 26 main_x) (<= main_y 26)) (and (<= 86 main_x) (<= 86 main_y) (<= main_x 86) (<= main_y 86)) (and (<= main_x 27) (<= main_y 27) (<= 27 main_y) (<= 27 main_x)) (and (<= main_y 95) (<= 95 main_x) (<= 95 main_y) (<= main_x 95)) (and (<= main_x 56) (<= 56 main_x) (<= 56 main_y) (<= main_y 56)) (and (<= 1 main_x) (<= main_x 1) (<= main_y 1) (<= 1 main_y)) (and (<= main_y 75) (<= main_x 75) (<= 75 main_y) (<= 75 main_x)) (and (<= main_x 62) (<= 62 main_x) (<= 62 main_y) (<= main_y 62)) (and (<= 68 main_y) (<= main_x 68) (<= main_y 68) (<= 68 main_x)) (and (<= main_y 78) (<= 78 main_x) (<= 78 main_y) (<= main_x 78)) (and (<= main_y 3) (<= 3 main_y) (<= 3 main_x) (<= main_x 3)) (and (<= main_x 36) (<= main_y 36) (<= 36 main_x) (<= 36 main_y)) (and (<= 57 main_y) (<= main_x 57) (<= main_y 57) (<= 57 main_x)) (and (<= main_x 25) (<= main_y 25) (<= 25 main_x) (<= 25 main_y)) (and (<= 5 main_x) (<= main_x 5) (<= main_y 5) (<= 5 main_y)) (and (<= 82 main_x) (<= 82 main_y) (<= main_x 82) (<= main_y 82)) (and (<= main_y 17) (<= 17 main_y) (<= 17 main_x) (<= main_x 17)) (and (<= main_y 83) (<= 83 main_x) (<= main_x 83) (<= 83 main_y)) (and (<= 77 main_x) (<= 77 main_y) (<= main_x 77) (<= main_y 77)) (and (<= 31 main_x) (<= 31 main_y) (<= main_y 31) (<= main_x 31)) (and (<= main_y 98) (<= main_x 98) (<= 98 main_y) (<= 98 main_x)) (and (<= 71 main_y) (<= 71 main_x) (<= main_y 71) (<= main_x 71)) (and (<= main_y 41) (<= 41 main_x) (<= 41 main_y) (<= main_x 41)) (and (<= 30 main_x) (<= 30 main_y) (<= main_x 30) (<= main_y 30)) (and (<= 24 main_y) (<= main_x 24) (<= main_y 24) (<= 24 main_x)) (and (<= main_y 50) (<= 50 main_y) (<= main_x 50) (<= 50 main_x)) (and (<= 84 main_y) (<= main_y 84) (<= main_x 84) (<= 84 main_x)) (and (<= main_y 93) (<= 93 main_y) (<= 93 main_x) (<= main_x 93)) (and (<= main_y 60) (<= main_x 60) (<= 60 main_y) (<= 60 main_x)) (and (<= 29 main_y) (<= main_x 29) (<= 29 main_x) (<= main_y 29)) (and (<= main_y 40) (<= main_x 40) (<= 40 main_y) (<= 40 main_x)) (and (<= main_y 53) (<= 53 main_y) (<= main_x 53) (<= 53 main_x)) (and (<= main_y 58) (<= 58 main_y) (<= 58 main_x) (<= main_x 58)) (and (<= 67 main_x) (<= 67 main_y) (<= main_y 67) (<= main_x 67)) (and (<= main_y 22) (<= main_x 22) (<= 22 main_x) (<= 22 main_y)) (and (<= 39 main_y) (<= 39 main_x) (<= main_x 39) (<= main_y 39)) (and (<= 13 main_x) (<= main_x 13) (<= main_y 13) (<= 13 main_y)) (and (<= main_y 79) (<= 79 main_x) (<= main_x 79) (<= 79 main_y)) (and (<= 69 main_x) (<= main_x 69) (<= 69 main_y) (<= main_y 69)) (and (<= 81 main_x) (<= main_y 81) (<= main_x 81) (<= 81 main_y)) (and (<= 28 main_y) (<= main_x 28) (<= 28 main_x) (<= main_y 28)) (and (<= main_y 66) (<= main_x 66) (<= 66 main_x) (<= 66 main_y)) (and (<= main_x 91) (<= 91 main_y) (<= 91 main_x) (<= main_y 91)) (and (<= 34 main_x) (<= main_y 34) (<= main_x 34) (<= 34 main_y)) (and (<= 89 main_x) (<= main_y 89) (<= main_x 89) (<= 89 main_y)) (and (<= 10 main_y) (<= main_x 10) (<= main_y 10) (<= 10 main_x)) (and (<= main_x 16) (<= main_y 16) (<= 16 main_x) (<= 16 main_y)) (and (<= 100 main_x) (<= main_y 100) (< 99 main_y)) (and (<= 2 main_y) (<= 2 main_x) (<= main_y 2) (<= main_x 2)) (and (<= main_x 7) (<= 7 main_y) (<= 7 main_x) (<= main_y 7)) (and (<= main_x 72) (<= 72 main_x) (<= 72 main_y) (<= main_y 72)) (and (<= 48 main_x) (<= main_x 48) (<= main_y 48) (<= 48 main_y)) (and (<= main_y 76) (<= main_x 76) (<= 76 main_y) (<= 76 main_x)) (and (<= 96 main_x) (<= main_y 96) (<= 96 main_y) (<= main_x 96)) (and (<= 45 main_x) (<= 45 main_y) (<= main_y 45) (<= main_x 45)) (and (<= 11 main_x) (<= main_x 11) (<= 11 main_y) (<= main_y 11)) (and (<= 90 main_x) (<= main_y 90) (<= 90 main_y) (<= main_x 90)) (and (<= main_x 19) (<= main_y 19) (<= 19 main_x) (<= 19 main_y)) (and (<= main_x 70) (<= main_y 70) (<= 70 main_x) (<= 70 main_y)) (and (<= 23 main_x) (<= 23 main_y) (<= main_y 23) (<= main_x 23))) [2018-09-26 21:32:05,677 INFO L202 PluginConnector]: Adding new model HiddenEquality-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:32:05 BoogieIcfgContainer [2018-09-26 21:32:05,677 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:32:05,678 INFO L168 Benchmark]: Toolchain (without parser) took 195953.58 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 7.3 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 113.8 MB). Peak memory consumption was 592.8 MB. Max. memory is 7.1 GB. [2018-09-26 21:32:05,679 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:32:05,679 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.72 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:32:05,679 INFO L168 Benchmark]: Boogie Preprocessor took 26.11 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:32:05,679 INFO L168 Benchmark]: RCFGBuilder took 265.91 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:32:05,680 INFO L168 Benchmark]: TraceAbstraction took 195604.98 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 7.3 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 92.7 MB). Peak memory consumption was 571.7 MB. Max. memory is 7.1 GB. [2018-09-26 21:32:05,681 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 0.23 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 49.72 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.11 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 265.91 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 195604.98 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 7.3 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 92.7 MB). Peak memory consumption was 571.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 29]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((x <= 49 && y <= 49) && 49 <= x) && 49 <= y) || (((8 <= y && y <= 8) && x <= 8) && 8 <= x)) || (((99 <= x && y <= 99) && 99 <= y) && x <= 99)) || (((42 <= x && y <= 42) && x <= 42) && 42 <= y)) || (((59 <= x && 59 <= y) && y <= 59) && x <= 59)) || (((9 <= y && 9 <= x) && x <= 9) && y <= 9)) || (((55 <= y && y <= 55) && 55 <= x) && x <= 55)) || (((74 <= x && x <= 74) && 74 <= y) && y <= 74)) || (((x <= 97 && 97 <= y) && y <= 97) && 97 <= x)) || (((12 <= x && 12 <= y) && y <= 12) && x <= 12)) || (((x <= 65 && y <= 65) && 65 <= x) && 65 <= y)) || (((32 <= x && x <= 32) && 32 <= y) && y <= 32)) || (((y <= 73 && x <= 73) && 73 <= x) && 73 <= y)) || (((6 <= x && x <= 6) && 6 <= y) && y <= 6)) || (((14 <= x && 14 <= y) && y <= 14) && x <= 14)) || (((x <= 0 && 0 <= y) && 0 <= x) && y <= 0)) || (((y <= 44 && x <= 44) && 44 <= y) && 44 <= x)) || (((38 <= x && 38 <= y) && y <= 38) && x <= 38)) || (((43 <= x && x <= 43) && y <= 43) && 43 <= y)) || (((21 <= y && 21 <= x) && x <= 21) && y <= 21)) || (((94 <= x && 94 <= y) && x <= 94) && y <= 94)) || (((52 <= x && 52 <= y) && y <= 52) && x <= 52)) || (((y <= 46 && 46 <= x) && x <= 46) && 46 <= y)) || (((x <= 18 && 18 <= y) && 18 <= x) && y <= 18)) || (((61 <= y && x <= 61) && y <= 61) && 61 <= x)) || 101 <= x) || (((88 <= y && y <= 88) && 88 <= x) && x <= 88)) || (((80 <= y && x <= 80) && y <= 80) && 80 <= x)) || (((x <= 92 && 92 <= y) && y <= 92) && 92 <= x)) || (((87 <= x && x <= 87) && 87 <= y) && y <= 87)) || (((35 <= y && y <= 35) && x <= 35) && 35 <= x)) || (((85 <= x && x <= 85) && 85 <= y) && y <= 85)) || (((63 <= x && 63 <= y) && y <= 63) && x <= 63)) || (((15 <= y && y <= 15) && 15 <= x) && x <= 15)) || (((y <= 64 && 64 <= x) && x <= 64) && 64 <= y)) || (((47 <= x && 47 <= y) && y <= 47) && x <= 47)) || (((51 <= y && x <= 51) && 51 <= x) && y <= 51)) || (((4 <= y && y <= 4) && x <= 4) && 4 <= x)) || (((54 <= y && y <= 54) && 54 <= x) && x <= 54)) || (((x <= 33 && 33 <= x) && y <= 33) && 33 <= y)) || (((37 <= x && 37 <= y) && y <= 37) && x <= 37)) || (((20 <= y && 20 <= x) && y <= 20) && x <= 20)) || (((26 <= y && x <= 26) && 26 <= x) && y <= 26)) || (((86 <= x && 86 <= y) && x <= 86) && y <= 86)) || (((x <= 27 && y <= 27) && 27 <= y) && 27 <= x)) || (((y <= 95 && 95 <= x) && 95 <= y) && x <= 95)) || (((x <= 56 && 56 <= x) && 56 <= y) && y <= 56)) || (((1 <= x && x <= 1) && y <= 1) && 1 <= y)) || (((y <= 75 && x <= 75) && 75 <= y) && 75 <= x)) || (((x <= 62 && 62 <= x) && 62 <= y) && y <= 62)) || (((68 <= y && x <= 68) && y <= 68) && 68 <= x)) || (((y <= 78 && 78 <= x) && 78 <= y) && x <= 78)) || (((y <= 3 && 3 <= y) && 3 <= x) && x <= 3)) || (((x <= 36 && y <= 36) && 36 <= x) && 36 <= y)) || (((57 <= y && x <= 57) && y <= 57) && 57 <= x)) || (((x <= 25 && y <= 25) && 25 <= x) && 25 <= y)) || (((5 <= x && x <= 5) && y <= 5) && 5 <= y)) || (((82 <= x && 82 <= y) && x <= 82) && y <= 82)) || (((y <= 17 && 17 <= y) && 17 <= x) && x <= 17)) || (((y <= 83 && 83 <= x) && x <= 83) && 83 <= y)) || (((77 <= x && 77 <= y) && x <= 77) && y <= 77)) || (((31 <= x && 31 <= y) && y <= 31) && x <= 31)) || (((y <= 98 && x <= 98) && 98 <= y) && 98 <= x)) || (((71 <= y && 71 <= x) && y <= 71) && x <= 71)) || (((y <= 41 && 41 <= x) && 41 <= y) && x <= 41)) || (((30 <= x && 30 <= y) && x <= 30) && y <= 30)) || (((24 <= y && x <= 24) && y <= 24) && 24 <= x)) || (((y <= 50 && 50 <= y) && x <= 50) && 50 <= x)) || (((84 <= y && y <= 84) && x <= 84) && 84 <= x)) || (((y <= 93 && 93 <= y) && 93 <= x) && x <= 93)) || (((y <= 60 && x <= 60) && 60 <= y) && 60 <= x)) || (((29 <= y && x <= 29) && 29 <= x) && y <= 29)) || (((y <= 40 && x <= 40) && 40 <= y) && 40 <= x)) || (((y <= 53 && 53 <= y) && x <= 53) && 53 <= x)) || (((y <= 58 && 58 <= y) && 58 <= x) && x <= 58)) || (((67 <= x && 67 <= y) && y <= 67) && x <= 67)) || (((y <= 22 && x <= 22) && 22 <= x) && 22 <= y)) || (((39 <= y && 39 <= x) && x <= 39) && y <= 39)) || (((13 <= x && x <= 13) && y <= 13) && 13 <= y)) || (((y <= 79 && 79 <= x) && x <= 79) && 79 <= y)) || (((69 <= x && x <= 69) && 69 <= y) && y <= 69)) || (((81 <= x && y <= 81) && x <= 81) && 81 <= y)) || (((28 <= y && x <= 28) && 28 <= x) && y <= 28)) || (((y <= 66 && x <= 66) && 66 <= x) && 66 <= y)) || (((x <= 91 && 91 <= y) && 91 <= x) && y <= 91)) || (((34 <= x && y <= 34) && x <= 34) && 34 <= y)) || (((89 <= x && y <= 89) && x <= 89) && 89 <= y)) || (((10 <= y && x <= 10) && y <= 10) && 10 <= x)) || (((x <= 16 && y <= 16) && 16 <= x) && 16 <= y)) || ((100 <= x && y <= 100) && 99 < y)) || (((2 <= y && 2 <= x) && y <= 2) && x <= 2)) || (((x <= 7 && 7 <= y) && 7 <= x) && y <= 7)) || (((x <= 72 && 72 <= x) && 72 <= y) && y <= 72)) || (((48 <= x && x <= 48) && y <= 48) && 48 <= y)) || (((y <= 76 && x <= 76) && 76 <= y) && 76 <= x)) || (((96 <= x && y <= 96) && 96 <= y) && x <= 96)) || (((45 <= x && 45 <= y) && y <= 45) && x <= 45)) || (((11 <= x && x <= 11) && 11 <= y) && y <= 11)) || (((90 <= x && y <= 90) && 90 <= y) && x <= 90)) || (((x <= 19 && y <= 19) && 19 <= x) && 19 <= y)) || (((x <= 70 && y <= 70) && 70 <= x) && 70 <= y)) || (((23 <= x && 23 <= y) && y <= 23) && x <= 23) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. SAFE Result, 195.4s OverallTime, 102 OverallIterations, 101 TraceHistogramMax, 24.1s AutomataDifference, 0.0s DeadEndRemovalTime, 2.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 204 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 19355 SolverSat, 142 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10403 GetRequests, 5148 SyntacticMatches, 2 SemanticMatches, 5253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 155.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 102 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 102 NumberOfFragments, 1314 HoareAnnotationTreeSize, 1 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 158.9s InterpolantComputationTime, 10605 NumberOfCodeBlocks, 10605 NumberOfCodeBlocksAsserted, 1494 NumberOfCheckSat, 10403 ConstructedInterpolants, 0 QuantifiedInterpolants, 2204123 SizeOfPredicates, 0 NumberOfNonLiveVariables, 21100 ConjunctsInSsa, 5351 ConjunctsInUnsatCore, 202 InterpolantComputations, 2 PerfectInterpolantSequences, 5151/348551 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEquality-Safe.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-32-05-697.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/HiddenEquality-Safe.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-32-05-697.csv Received shutdown request...